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WO2007136039A1 - structure de panneau pour dispositif de transport ou structure de panneau POUR ÉlÉment structurel de construction, ET SON PROCÉDÉ DE FABRICATION - Google Patents

structure de panneau pour dispositif de transport ou structure de panneau POUR ÉlÉment structurel de construction, ET SON PROCÉDÉ DE FABRICATION Download PDF

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Publication number
WO2007136039A1
WO2007136039A1 PCT/JP2007/060382 JP2007060382W WO2007136039A1 WO 2007136039 A1 WO2007136039 A1 WO 2007136039A1 JP 2007060382 W JP2007060382 W JP 2007060382W WO 2007136039 A1 WO2007136039 A1 WO 2007136039A1
Authority
WO
WIPO (PCT)
Prior art keywords
rectangular plate
protrusions
panel structure
protrusion
cross
Prior art date
Application number
PCT/JP2007/060382
Other languages
English (en)
Japanese (ja)
Inventor
Ichiro Okura
Toshiyuki Ishikawa
Nobuyasu Hagisawa
Original Assignee
Osaka University
Kansai Technology Licensing Organization Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Osaka University, Kansai Technology Licensing Organization Co., Ltd. filed Critical Osaka University
Priority to JP2008516687A priority Critical patent/JPWO2007136039A1/ja
Publication of WO2007136039A1 publication Critical patent/WO2007136039A1/fr

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
    • E04C2/32—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure formed of corrugated or otherwise indented sheet-like material; composed of such layers with or without layers of flat sheet-like material
    • E04C2/324—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure formed of corrugated or otherwise indented sheet-like material; composed of such layers with or without layers of flat sheet-like material with incisions or reliefs in the surface
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
    • E04C2003/0443—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by substantial shape of the cross-section
    • E04C2003/0452—H- or I-shaped

Definitions

  • the present invention mainly relates to a panel structure for a transport device or a panel structure for a structural member for a building, and a manufacturing method thereof.
  • the members constituting the structure are required to have a predetermined buckling strength against compressive loads and bending loads.
  • each buckling is different from the deformation pattern when receiving a compressive load.
  • the member buckling strength decreases. Therefore, before the member buckling occurs, the cross-sectional dimensions of the plate are determined so that plate buckling does not occur.
  • the material of the member can be reduced by reducing the thickness of the rectangular plate constituting the member.
  • the rectangular plate is simply reduced in thickness, the rectangular plate has a compressive load acting in the in-plane direction. The problem that it becomes easy to raise
  • the rectangular plate is provided with ribs, there has been no technology for further thinning the rectangular plate without reducing the buckling strength.
  • the technology for thinning a rectangular plate without reducing the buckling strength has been strong.
  • the main object of the present invention is to provide a thinned rectangular plate that can be manufactured with a smaller number of saddle materials while satisfying substantially the same buckling strength as a rectangular plate not provided with a protrusion.
  • the inventors of the present invention conducted intensive research to solve the above-described problems. As a result, by providing protrusions on the rectangular plate, while satisfying substantially the same buckling strength as the rectangular plate without protrusions, The present inventors have found that the width-thickness ratio of the rectangular plate can be increased and the total cross-sectional area of the protrusion and the rectangular plate can be reduced as compared with the conventional rectangular plate having no protrusions, and the present invention has been completed.
  • the present invention relates to the following panel structure for transport equipment or panel structure for a structural member for building, and a method for producing the same.
  • a panel structure for a transportation equipment or a structural member for a building comprising a rectangular plate, two or more supports, and one or more protrusions,
  • the rectangular plate is supported by two or more supports, including two supports at the ends of the rectangular plate.
  • the one or more protrusions are provided on the rectangular plate across a region sandwiched by two opposing supports out of the two or more supports,
  • the width-thickness ratio of the rectangular plate is larger than the width-thickness ratio of the rectangular plate, provided with protrusions.
  • a rectangular plate with one or more protrusions has substantially the same buckling strength as a rectangular plate without protrusions
  • Panel structure for transportation equipment or structural member for buildings are Panel structure for transportation equipment or structural member for buildings.
  • the rectangular plate is made of at least one material selected from the group consisting of metal, resin, and fiber reinforced resin, and the protrusion is made of metal, resin, and fiber reinforced resin.
  • Item 2 The panel structure according to Item 1, which also has at least one material force selected from the group consisting of:
  • Item 2 The method for producing a panel structure according to Item 1, comprising (wherein steps (I) and (ii) may be performed in any order or simultaneously! /)).
  • the rectangular plate In the region sandwiched between the two opposing supports, the rectangular plate is provided on the rectangular plate at an equal interval parallel to the opposing two supports, and the rectangular plate is in the plane of compression or bending.
  • the transport device panel structure or building structure member panel structure according to any one of Items 1 to 12, which is less than 7?
  • k Buckling coefficient of a rectangular plate without protrusions, when subjected to compression, 4 when subjected to bending 23.
  • n E ZE: Ratio of Young's modulus of protrusion to Young's modulus of rectangular plate
  • ⁇ Buckling strength of a rectangular plate without protrusions or a rectangular plate with protrusions that is subjected to compression or bending.
  • the feature of the present invention is that for each s (total number of plate elements delimited by protrusions),
  • s and ⁇ that minimize r? Can be easily obtained.
  • the panel structure for transportation equipment or the panel structure for structural members for buildings of the present invention can be obtained as follows.
  • the protrusions created by the above-described calculation may move several times in the out-of-plane direction of the rectangular plate (for example, 0, 1, 2). Or three places, the number of places restrained in proportion to the length of the rectangular plate can be increased), and the same between the adjacent protrusions or between the protrusions and the adjacent end support
  • a new protrusion can be formed (point D in FIG. 26 of Example 5), and the cross-sectional area can be further reduced (further thinning).
  • thinning has been achieved by providing a rib (intermediate support) on a rectangular plate, but in the conventional panel structure design, thinning is achieved when a specific rib (intermediate support) is provided. Since the degree of this was only clarified at a specific point, no means for achieving further thinning was known.
  • the transport device panel structure or the structural member panel structure of the present invention basically includes a rectangular plate, two or more supports and one or more. Consists of protrusions.
  • Two or more supports are provided as “two or more supports” because they can be provided with a pair of supports on opposite sides (ends) of the rectangular plate and further provided with one or more intermediate supports.
  • the number of intermediate supports is a force determined by the size and material of the rectangular plate and the manufacturing conditions of the panel structure. For example, the number of intermediate supports can be set appropriately based on the following concept.
  • the distance between adjacent intermediate supports is generally required to be 300 mm or more due to the workability of welding.
  • a maximum of two intermediate supports are provided in the region above half the width of the rectangular plate that receives compressive stress.
  • one intermediate support is provided, as shown in FIG. 18 (b) of Example 2
  • it is provided at a position 0.2 times the plate width from the upper end of the rectangular plate.
  • the upper end force of the rectangular plate is also provided at a position 0.14 times and 0.36 times the plate width.
  • a rectangular plate provided with one or more protrusions has substantially the same buckling strength as a rectangular plate not provided with protrusions.
  • the numerical values obtained can be rounded up for manufacturing.
  • the thickness of a rectangular plate with the required buckling strength When the thickness and the thickness of the protrusion are calculated to be 7.3 mm and 9.3 mm, respectively, rounding to 7 mm and 9 mm respectively will not provide the required buckling strength.
  • the dimensions may be determined by rounding up. In this case, the value of ⁇ becomes large. “Substantially the same buckling strength” means that the buckling strength may be slightly increased from such a design or practical requirement.
  • FIG. 3 shows a schematic diagram of the panel structure of the present invention.
  • FIG. 3 (a) is a schematic view of the panel structure of the present invention in the case where the rectangular plate is provided with a rib (intermediate support).
  • the buckling strength of the rectangular plate has been increased by attaching ribs to the rectangular plate so that the position of the ribs is not moved.
  • the rectangular plate with ribs is made thinner without reducing the buckling strength.
  • the technology to make it was a great effort.
  • the present invention as shown in FIG. 3 (a), by providing one or more protrusions on a rectangular plate having ribs, the rectangular plate can be further thinned without reducing buckling strength. .
  • FIG. 3 (b) is a schematic view of the panel structure of the present invention when the rectangular plate is not provided with a rib.
  • the technology for thinning a rectangular plate without ribs without reducing the buckling strength has been strong.
  • the rectangular plate can be thinned without reducing buckling strength. .
  • ribs have a large cross-sectional dimension, so that a large number of materials are required even if a large number of ribs cannot be provided on a rectangular plate, or many can be provided on a rectangular plate. It becomes.
  • the projections in the present invention have a relatively small cross-sectional dimension, a large number of protrusions can be provided on a rectangular plate. I'm sorry.
  • the rib and the protrusion in the present invention are different.
  • the rib When the rib is provided on the rectangular plate between the two supporting bodies, when the rectangular plate is subjected to a compressive load exceeding a predetermined level, buckling occurs between the rib and each support using the rib as a node. At this time, the rib position does not move (Fig. 4 (a)).
  • the ribs increase the buckling strength of the rectangular plate by not moving its own position, and function as a support.
  • the projection is provided on the rectangular plate between the two supports, if the rectangular plate is subjected to a large compressive load exceeding a predetermined level, buckling occurs between the support and the support.
  • the rectangular plate is not particularly limited, but the material force used in the field of transportation equipment or building such as metal, fiber reinforced metal, resin, fiber reinforced resin is also made.
  • a metal used in the field of transportation equipment or buildings can be widely used, and is not particularly limited.
  • at least one selected from the group consisting of iron, aluminum, and magnesium force, or An alloy based on this (for example, containing 50% by weight or more) is preferably used.
  • the alloy is not particularly limited to a force that can suitably use steel, stainless steel, aluminum alloy, and the like.
  • phosphorus-added steel, BH (Bake-Hardening) steel, ultra-deep drawn high-strength steel, aluminum alloy, etc. can be suitably used for the rectangular plate in the panel structure for transportation equipment.
  • steel, stainless steel, aluminum alloy, etc. can be suitably used for the rectangular plate in the structural member panel structure for buildings.
  • the resin it is possible to use a synthetic or natural resin such as thermoplastic resin, engineering plastic, thermosetting resin, and the like appropriately mixed with plasticizer, filler, colorant and the like.
  • a synthetic or natural resin such as thermoplastic resin, engineering plastic, thermosetting resin, and the like appropriately mixed with plasticizer, filler, colorant and the like.
  • the Synthetic or natural fats include polyethylene, polypropylene, polychlorinated butyl, polyacetic acid butyl, ABS (Acrylonitrile Butadiene Styrene) rosin, AS (Acrylonitril e Styrene) rosin, AES (Acrylonitrile Ethylene Styrene) rosin, AAS (Acrylonitrile).
  • Nitrile Acrylate Styrene acrylic (acid) resin, polyamide, polycarbonate, polyacetal, modified polyphenylene ether, polybutylene terephthalate, GF—P ET resin, polyphenylene sulfide, sulfone-based resin, polyether At least one selected from the group consisting of ether ketone, polyarylate, polyamideimide, thermoplastic polyimide, polyetherimide, fluorine resin, phenol resin, polyurethane, unsaturated polyester resin, and epoxy resin, or this -Based mixed fat (containing 50% by weight or more) It can be used, in particular, polypropylene, acrylic (acid) ⁇ , phenol ⁇ fat, polyurethane, unsaturated polyester ⁇ , Ru can be suitably used epoxy ⁇ .
  • a fiber-reinforced metal or fiber-reinforced resin obtained by reinforcing the metal or the resin with fibers can also be used as a material for the rectangular plate.
  • the fiber reinforced metal or fiber reinforced resin it is possible to use a metal or resin in which fibers are dispersed by a conventional method, or a non-woven fabric or woven fabric made of fibers solidified with a metal or resin by a conventional method. Can also be used.
  • the fiber used for the fiber reinforced metal or fiber reinforced resin include glass fiber, carbon fiber, silicon carbide fiber, Tyranno fiber, boron fiber, aramid fiber, polyarylate fiber, high strength polyethylene fiber, alumina fiber, and amorphous fiber.
  • Metal fibers, steel fibers, stainless steel fibers and the like can be mentioned, and glass fibers, carbon fibers and aramid fibers are particularly preferable.
  • one type of fiber may be used alone, or two or more types of fibers may be used in combination.
  • the rectangular plate includes a curved rectangular plate that is slightly curved in whole or in part in the width direction of the rectangular plate.
  • the radius of curvature R of the curved surface portion is not particularly limited, but is, for example, 0.05 times or more, preferably 0.1 times or more, more preferably 0.2 times or more with respect to b 2 ZT.
  • b is the width of the curved rectangular plate
  • T is the thickness of the curved rectangular plate.
  • the rectangular plate in the present invention includes a substantially plate-shaped rectangular plate having a slightly wavy surface or a slightly rough surface.
  • the support is not particularly limited, but is made of a material used in the field of transportation equipment or building such as metal, fiber reinforced metal, greaves, and fiber reinforced greaves. About a metal, a fiber reinforced metal, a resin, a fiber reinforced resin etc., the thing similar to a rectangular plate can be used conveniently.
  • the shape of the support is not particularly limited.
  • the protrusion is not particularly limited, but is a piece of material made of a material used in the field of transport equipment or building such as metal, fiber reinforced metal, resin, fiber reinforced resin. About a metal, a fiber reinforced metal, a resin, a fiber reinforced resin etc., the thing similar to a rectangular board can be used.
  • the material of the protrusion may be different from the material of the rectangular plate, but the viewpoint power such as the integrity of the protrusion and the rectangular plate, the ease of setting conditions when the protrusion is provided on the rectangular plate, and the material of the rectangular plate It is desirable to be the same.
  • the protrusion is preferably a metal or carbon fiber, and the rectangular plate and the protrusion are preferably made of the same metal.
  • the shape of the protrusion is, for example, a shape having a cross section such as a rectangle, a trapezoid, an ellipse, a mountain, an L shape, and a T shape, but is not limited thereto.
  • the rectangular plate is supported by two or more supports including two supports at the end of the rectangular plate.
  • support means to support at least temporarily.
  • “Support” does not necessarily mean fixing, but usually high safety is required in this field, so it is usually fixed by fusion welding, pressure welding, brazing, bolting, bonding, etc., screw, It is desirable to be done by fixing using bolts, hooks, hinges and other auxiliary tools, fixing using the shape of members such as fitting U, etc.
  • the material of the rectangular plate is aluminum or an aluminum alloy, it is possible to manufacture a rectangular plate having projections by bonding such as friction stir welding (FSW) and to bond the rectangular plate having projections or projections to the support. .
  • FSW friction stir welding
  • a rectangular plate is integrated with two or more supports by a molding technique such as rolling or extrusion, or when the rectangular plate is “supported” by two or more supports. included.
  • a molding technique such as rolling or extrusion
  • the rectangular plate is “supported” by two or more supports. included.
  • prisms are integrated as shown in Fig. 23 (a) and Fig. 23 (b).
  • the rectangular plate may be supported by two or more supports in any state.
  • FIG. 6 (a) when the rectangular plate 1 is supported by the support 2 (type I), Fig. 6 (b)
  • FIG. 2 shows a schematic cross-sectional view when a rectangular plate of 2 is supported by a support of 2 (box type).
  • Figure 7 also shows several patterns in which a rectangular plate is supported by two supports located at the ends of the rectangular plate.
  • Figure 8 shows the pattern of forces in which a rectangular plate is supported by two or more supports and ribs (intermediate supports) located at the ends of the rectangular plate. However, the projections are omitted in FIGS.
  • the l or more protrusions are provided on the rectangular plate in a region sandwiched by two of the two or more supports facing each other.
  • facing means facing in parallel or almost in parallel.
  • the "region sandwiched between two opposing supports” means a region on a rectangular plate between one support and the other support of the two supports facing each other.
  • the two supports facing each other include a combination of upper and lower supports in FIG. 8, a combination of upper and lower supports and an intermediate support, and a combination of two intermediate supports.
  • the two supports facing each other are in parallel or substantially parallel to each other.
  • Examples of the “region sandwiched between two opposing supports” include rectangular plate 1, rectangular plate 2, and rectangular plate 3 in FIG.
  • the “region sandwiched between two opposing supports” includes the region sandwiched by two members that are supposed to support the rectangular plate facing each other in the event of a collision.
  • the hood of an automobile is in a state where it is lightly in contact with the parts of the front part of the vehicle body (for example, front fender, frame, etc.) during normal times, it receives a collision load at the time of collision and is strongly sandwiched between these parts. May be supported.
  • the region on the rectangular plate that is assumed to be sandwiched at least temporarily by the support is also included in the “region sandwiched by the two opposing supports”.
  • the support provided in the region inside the end of the rectangular plate is referred to as a "rib (intermediate support)". Since the “rib” supports the rectangular plate, it is included in the “support” in the present invention. Thus, for example, when a rectangular plate having a support at the end portion is further provided with a rib, the “region sandwiched between the two support members facing each other” is the region sandwiched between each support member at the end portion and the rib. , And Z or a region sandwiched between ribs.
  • the protrusion can be provided on the rectangular plate by a conventional method such as fusion welding, pressure welding, brazing, bolt joining, or adhesion.
  • the protrusion is rolled, extruded, It is desirable that the rectangular plate be provided in an integrated state with the rectangular plate by a molding technique such as shape.
  • the protrusion may be provided on one side of the rectangular plate (FIG. 9 (a)) or may be provided on both sides (FIG. 9 (b) and FIG. 9 (c)).
  • the protrusions be provided substantially parallel to the two opposing supports. By being provided in parallel as described above, since the force acts on the protrusion only in the direction along the protrusion, the buckling strength of the rectangular plate is higher than when the protrusion is not provided in parallel.
  • the protrusions are provided at substantially equal intervals between the two supports. As shown in FIG. 10, when the rectangular plate receives a shearing load, the buckling strength of the rectangular plate against the shearing load can be maximized by being provided at equal intervals.
  • FIG. 11 shows several patterns in which one or more protrusions are provided on a rectangular plate.
  • the width-thickness ratio of the rectangular plate is provided with protrusions! /,!, Greater than the width-thickness ratio of the rectangular plate.
  • the designer is provided with a protrusion, and the width-thickness ratio satisfying the buckling strength of the rectangular plate
  • the total cross-sectional area of the rectangular plate and the one or more protrusions is smaller than the cross-sectional area of the rectangular plate provided with the protrusions.
  • the rectangular plate with protrusions has substantially the same buckling strength as the rectangular plate without protrusions.
  • the buckling strength substantially the same as the rectangular plate provided with the protrusions is the buckling strength arbitrarily determined by the designer.
  • the designer cannot generally set the buckling strength to be greater than the yield stress of the material or 0.2% resistance (for materials that do not have a clear yield point).
  • the material yield stress or 0.2% resistance (for materials that do not have a clear yield point) is used!
  • the rectangular plate has a width-thickness ratio that is larger than the width-thickness ratio of the rectangular plate, and has a total cross-sectional area of the rectangular plate and one or more protrusions. Is provided with one or more protrusions that are just smaller than the cross-sectional area of a rectangular plate without protrusions.
  • the rectangular plate has substantially the same buckling strength as the rectangular plate having no protrusion.
  • the rectangular plate having protrusions has substantially the same buckling strength as the rectangular plate having no protrusions, and the width-thickness ratio of the rectangular plates is increased (that is, The rectangular plate is thinned to a certain width), and the cross-sectional area of the rectangular plate including the protrusion is reduced. Reducing the cross-sectional area of the rectangular plate including the protrusions means that a rectangular plate having the protrusions can be manufactured with less material.
  • the transport device panel structure of the present invention is not particularly limited, but can be applied to transport devices such as automobiles, motorcycles, railway vehicles, ships, airplanes, and spacecrafts.
  • Automobiles, railway vehicles, ships, airplanes, and spacecraft are transportation equipment that can move at high speed, and are highly likely to receive large compression loads and Z or bending loads in the in-plane direction due to collisions. Since the bending strength is required, the present invention can be applied particularly to these high-speed movable transportation equipment.
  • the panel structure for a structural member for a building of the present invention is not particularly limited, but can be applied to a building such as a building or a bridge.
  • the present invention includes (I) a step of supporting a rectangular plate with two or more supports including two supports at the end of the rectangular plate, and (i) one or more protrusions with two or more supports.
  • a method for producing a panel structure for a transportation device or a panel structure for a structural member for a building according to the present invention comprising a step of preparing a rectangular plate in a region sandwiched by two opposing supports in the body.
  • the steps (I) and (ii) may be performed in any order or at the same time.
  • a welding method or a joining method performed in the relevant field such as fusion welding, pressure welding, brazing, bolt joining, adhesion or the like, or screws, bolts, hooks, hinges, etc.
  • the rectangular plate can be fixed to two or more supports using an auxiliary tool, but is not limited thereto. Further, the rectangular plate may be supported by the support by integrating the rectangular plate and the support by molding performed in the field such as rolling or extrusion. The rectangular plate and the support are as described above.
  • one or more protrusions are formed on two or more supports by a welding method or a joining method performed in the relevant field such as fusion welding, pressure welding, brazing, bolt joining, or adhesion. Heading out
  • the force that can be provided to the rectangular plate in the region sandwiched between the two supporting members is not limited to these.
  • the projection may be provided on the rectangular plate by integrally forming the projection and the rectangular plate by molding performed in this field such as rolling or extrusion molding.
  • the protrusions are as described above.
  • a T-shaped member that forms part of the protrusion and the rectangular plate, and a support (there is a part of the support and the rectangular plate) It is also possible to form the rectangular plate and the protrusion at the same time by connecting the T-shaped member) by an appropriate method such as friction stir welding (FSW). This method is particularly useful when the material of the rectangular plate and the projections or intermediate support is aluminum or aluminum alloy.
  • FSW friction stir welding
  • A is the cross-sectional area of a rectangular plate with protrusions having substantially the same buckling strength as a rectangular plate without protrusions, and a conventional plate with a predetermined buckling strength but without protrusions.
  • A is the cross-sectional area of the rectangular plate
  • Example 1 it is described that a rectangular plate with 5 protrusions can further reduce the cross-sectional area by 31% compared to a rectangular plate with 1 intermediate support.
  • Example 2 3 protrusions are provided. It is described that the rectangular plate can further reduce the cross-sectional area by 16% than the rectangular plate with two intermediate supports! RU
  • Rectangular plates used in the field of transportation equipment or buildings require a large amount of material that is larger in size than rectangular plates used in fields such as precision machinery and home appliances.
  • the ability to reduce materials in this area is very meaningful in terms of reducing manufacturing costs and saving resources.
  • reducing the amount of material used can reduce the weight of the transport equipment. , Leading to fuel reduction or increased loading capacity. Furthermore, reducing the amount of materials used can reduce the weight of the building, allowing construction of the building in areas where the ground strength is weak, reducing seismic loads, and construction work. It leads to improvement of sex.
  • k Buckling coefficient of a rectangular plate without protrusions 4 when subjected to compression and 23 when subjected to bending.
  • ⁇ bZT: Width / thickness ratio of rectangular plate without protrusions
  • T Thickness of rectangular plate without protrusions
  • the buckling strength ⁇ of the rectangular plate without protrusions cannot be set larger than the yield stress of the material or 0.2% resistance (in the case of a material having no clear yield point). Therefore, in general, the buckling strength ⁇ of the rectangular plate without protrusions is often set to the yield stress of the material or 0.2% resistance (with no clear yield point !, for the material).
  • ⁇ bZt: Width-thickness ratio of rectangular plate with protrusions
  • the buckling coefficient k of a rectangular plate with protrusions for compression or bending is given by the following formula (Ichiro Okura: Fundamental of Structural Design of Steel, Toyo Shoten, PP. 223-264, 2004 and Ichiro Oshoku, Kogo Kitamura, Shinsuke Akasaki, Takahisa Tsuji, Big 'Lazzro' Gergeri, Katsumi Mikawa: Proposal of a new aluminum alloy stiffening girder, Journal of Structural Engineering, Vol. 51 A, pp. 203-210, 2005).
  • t Thickness of the root of the protrusion (see Table 1)
  • b When there are protrusions on one side of the rectangular plate b, when there are protrusions on both sides of the rectangular plate b (Table b: Height of protrusions (see Table 1)
  • the plate width b of the rectangular plate with protrusions has the following relationship with the width b of the plate elements divided by the protrusions and the total number s of plate elements.
  • n E ZE: Ratio of Young's modulus of protrusion to Young's modulus of rectangular plate
  • ⁇ b Zt: Width / thickness ratio of the plate elements delimited by protrusions
  • n E i ZE: Ratio of Young's modulus of protrusion to Young's modulus of rectangular plate
  • ⁇ b Zt: Width / thickness ratio of the plate elements delimited by protrusions
  • the width-thickness ratio ⁇ of the rectangular plate with protrusions and the width-thickness ratio j8 of the plate elements separated by the protrusions have the following relationship.
  • the buckling strength of the rectangular plate without protrusions is set equal to that of the rectangular plate with protrusions.
  • the following equation is obtained by placing the equations (1) and (3) equally.
  • ⁇ bZt: Width-thickness ratio of rectangular plate with protrusions
  • ⁇ bZT: Width / thickness ratio of rectangular plate without protrusions
  • ⁇ b Zt: Width / thickness ratio of the plate elements delimited by protrusions
  • Equation 14 [0099] [Equation 14] c [0100] Substituting Equation (5) into Equation (16) and solving for ⁇ , we obtain
  • n E ZE: Ratio of Young's modulus of protrusion to Young's modulus of rectangular plate
  • ⁇ bZT: Width / thickness ratio of rectangular plate without protrusions
  • ⁇ b Zt: Width / thickness ratio of the plate elements delimited by protrusions
  • T Thickness of rectangular plate without protrusions
  • the buckling strength of the rectangular plate with protrusions cannot exceed the buckling strength of the plate elements separated by the protrusions. Therefore, the buckling coefficient k for compression or bending of the rectangular plate with protrusions is subject to the following restrictions.
  • k The buckling coefficient of a plate element separated by protrusions against compression or bending is expressed as the buckling coefficient of the entire rectangular plate with protrusions.
  • 4sV 2. Is— 2 (Ochiro Ichiro: Fundamentals of Steel Structural Design, Toyo Shoten, PP. 223-264, 2004) and Ochiro Ichiro, Kitamura Kosuke, Akasaki Kosuke, Tsuji Takahisa, Big 'Razguchi' Gergeri, Katsumi Mikawa: Proposal of a new aluminum alloy stiffening girder, Structural Engineering Papers, Vol. 51 A, pp. 203-210, 2005).
  • the protrusion should be less than the buckling strength of the rectangular plate with protrusions and should not buckle. Therefore, if the protrusion is regarded as a free protruding plate subjected to compression, the protrusion must satisfy the following equation.
  • Equation (28) The left side of equation (28) is the buckling strength of the free protruding plate subjected to compression (Okura Ichiro: Fundamental Design of Steel Structure, Toyo Shoten, pp. 223-264) o
  • the average thickness t of the protrusion is , Protrusion breakage
  • the area (if there are protrusions on both sides of the rectangular plate, the sectional area of the protrusion on one side) is the height of the protrusion b
  • the stress ⁇ generated in the protrusion is given by the following equation under the condition that the strain generated in the rectangular plate is equal to the strain generated in the protrusion.
  • the stress ⁇ e generated on the protrusion cannot be greater than the yield stress of the protrusion material or 0.2% resistance (for materials that do not have a clear yield point). Therefore, the stress ⁇ generated in the protrusion is subject to the following restrictions.
  • Equation (30) always holds when the material of the rectangular plate and the material of the protrusion are the same. If a material different from that of the rectangular plate is used for the projection, depending on the material, equation (30) may not be satisfied! Because there are some materials, it must be confirmed that the material selected for the projection satisfies equation (30). I must.
  • the Young's modulus and Poisson's ratio can be obtained with reference to JIS standards and the like.
  • the Young's modulus E and Poisson's ratio of a metal material can be determined according to the standard of JIS Z 2241 “Metal material tensile test method”.
  • the Young's modulus E and Poisson's ratio of the plastic can be determined according to the standard of JIS K 7113 “Plastic tensile test method”.
  • the Young's modulus E and Poisson's ratio of the carbon fiber reinforced resin can be obtained according to the standard of JIS K 7073 “Tensile test method for carbon fiber reinforced plastic”.
  • the thickness, width, and height of the rectangular plate and the protrusion are measured by a conventional method using a measuring instrument such as a caliper, a micrometer, a laser displacement sensor, and a microscope.
  • a measuring instrument such as a caliper, a micrometer, a laser displacement sensor, and a microscope.
  • Young's modulus, Poisson's ratio, thickness, etc. are often described in catalogs and instructions, so use those values. Say it with a word.
  • the width-thickness ratio of the rectangular plate is satisfied while satisfying substantially the same buckling strength as that of the rectangular plate without the protrusions. It is possible to make the cross-sectional area of the rectangular plate including the protrusion larger than the width-thickness ratio of the rectangular plate not including the protrusion and smaller than the cross-sectional area of the rectangular plate not including the protrusion.
  • the panel structure for a transportation device or the structural member for a building of the present invention satisfies substantially the same buckling strength as a rectangular plate not provided with a projection, and is less than the conventional one. ! / Can be manufactured with materials.
  • the total cross-sectional area of the rectangular plate and the protrusion can be increased. , About 0.4 to about 0.6 of the cross-sectional area of a rectangular plate without conventional protrusions It is possible to reduce by a factor of two.
  • the present invention uses protrusions having a smaller cross-sectional dimension than the ribs, the present invention can be applied to a panel structure in which it is difficult to design a rib having a large cross-sectional dimension.
  • Fig. 1 (a) shows member buckling
  • Fig. (B) shows plate buckling
  • FIG. 2 A conventional panel structure for a structural member, in which a support called a rib is attached to a rectangular plate.
  • FIG. 3 The structural member panel structure of the present invention when the rectangular plate is provided with ribs or when the rectangular plate is provided with ribs.
  • Fig. (A) is a panel structure for a structural member of the present invention having one or more protrusions on a rectangular plate having ribs.
  • Fig. (B) is one or more protrusions on a rectangular plate having no ribs. It is the panel structure for structural members of this invention provided with these.
  • Fig. 4 Fig. (A) is a buckling deformation pattern of a rectangular plate with ribs
  • Fig. (B) is a buckling deformation pattern of a rectangular plate with protrusions
  • Fig. (C) is a plurality of protrusions
  • (D) shows the buckling deformation pattern of a rectangular plate with ribs and protrusions.
  • FIG. 5 A curved rectangular plate that is slightly curved in whole or in part in the width direction of the rectangular plate.
  • Fig. (A) is a schematic cross-sectional view of the case where 1 rectangular plate is supported by 2 supports (type I cross section), and Fig. 6 (b) is that 2 rectangular plates are supported by 2 supports. A schematic cross-sectional view when supported (box-shaped cross section) is shown.
  • the rectangular plate shows several patterns supported by two supports located at the ends of the rectangular plate.
  • FIG. 8 A rectangular plate shows several patterns supported by two or more supports and ribs (intermediate supports) located at the end of the rectangular plate.
  • Fig. 9 Fig. (A) is provided with protrusions on one side of the rectangular plate, Fig. (B) is provided with protrusions on both sides of the rectangular plate, and Fig. (C) is shown on both sides of the rectangular plate. Are provided with protrusions at the same position.
  • FIG. 10 A rectangular plate with protrusions at equal intervals is subjected to a shear load.
  • FIG. 11 Shows several turns that have one or more protrusions on a rectangular plate.
  • FIG.12 Four-sided simply supported rectangular plate subjected to compression or bending.
  • Fig. (A) shows the case where a rectangular plate supported simply by 4 sides is subjected to compression
  • Fig. (B) shows the case where a rectangular plate supported simply by 4 sides is subjected to bending.
  • FIG. 13 A rectangular plate with protrusions at equal intervals, subject to compression or bending.
  • Figure (a) shows the case where rectangular plates with projections at equal intervals are subjected to compression
  • Fig. (B) shows the case where rectangular plates with projections at equal intervals are bent.
  • FIG.14 Location of protrusion.
  • Figure (a) shows b and b when there are protrusions on one side of the rectangular plate
  • Figure (b) shows b and b when there are protrusions on both sides of the rectangular plate.
  • Figure 15 Cross-sectional shape of aluminum alloy web according to “Aluminum alloy civil engineering design 'production guidelines”.
  • Figure (a) shows the cross-sectional shape of an aluminum alloy web without protrusions or ribs (intermediate support), and
  • Figure (b) shows aluminum with one rib (intermediate support). The cross-sectional shape of an alloy web is shown.
  • FIG. 17 is a cross-sectional shape of an aluminum alloy web having 5 protrusions obtained by applying the present invention.
  • FIG.18 Cross section of steel web according to “Road Bridge Specification / Common Explanation I Common Section II Steel Bridge Section”.
  • Figure (a) shows the cross-sectional shape of a steel web without protrusions or ribs (intermediate support), and
  • Figure (b) shows the cross-sectional shape of a steel web with one rib (intermediate support).
  • Figure (c) shows the cross-sectional shape of a steel web with two ribs (intermediate support).
  • FIG. (A) shows the cross-sectional shape of a steel web provided with 6 projections obtained by applying the present invention.
  • Fig. (B) shows the half of the width of the web in the figure (a). The cross-sectional shape of the web from which the protrusions have been removed is shown.
  • FIG.21 Cross section of aluminum beam.
  • Figure (a) shows the general cross-sectional shape of the aluminum girder without protrusions
  • Figure (b) shows the final cross-sectional shape of the aluminum girder without protrusions
  • Figure (c) shows the cross-sectional shape of the aluminum girder with protrusions.
  • FIG. 22 Relationship between ⁇ and e of aluminum alloy web with protrusions subjected to bending.
  • FIG.23 Cross section of aluminum column.
  • Figure (a) shows the cross-sectional shape of an aluminum column without protrusions.
  • Figure (b) shows the cross-sectional shape of the aluminum column with protrusions.
  • FIG. 26 Sectional shape of aluminum alloy plate corresponding to points 0, A, B, C, D in FIG.
  • FIG. 27 is a panel structure obtained by applying the present invention twice.
  • FIG.29 Cross-sectional shape of steel plate subjected to compression.
  • Fig. (A) shows the cross-sectional shape of a steel plate without projections
  • Fig. (B) shows the cross-sectional shape of a steel plate with projections.
  • FIG.31 Cross-sectional shape of steel plate subjected to bending.
  • Fig. (A) shows the cross-sectional shape of a steel plate without projections
  • Fig. (B) shows the cross-sectional shape of a steel plate with projections.
  • A Cross-sectional area of a rectangular plate without protrusions
  • A Cross-sectional area of a rectangular plate with protrusions, including protrusions
  • T Thickness of rectangular plate without protrusions
  • k The buckling coefficient of a plate element separated by protrusions, expressed as the buckling coefficient of the entire rectangular plate with protrusions
  • n Ratio of Young's modulus of protrusion to Young's modulus of rectangular plate
  • Width-thickness ratio of rectangular plate without protrusions 18 Width-thickness ratio of plate elements delimited by protrusions
  • ⁇ Buckling strength of a rectangular plate with or without protrusions subjected to compression or bending
  • an aluminum alloy girder web There are provisions for the case where one rib (intermediate support) is provided on a rectangular plate to be bent.
  • the aluminum alloy type is A6061——6, the width / thickness ratio of a web without ribs is limited to 65 or less, and the width / thickness ratio of a web with one rib is limited to 90 or less. Yes. Therefore, the width-thickness ratio j8 of a web without ribs is set to 65.
  • the ratio of the area of the cross-sectional shape of Fig. 15 (b) to the area of the cross-sectional shape of Fig. 15 (a) is 0.820.
  • the present invention is applied to a web without protrusions having a width-thickness ratio 13 of 65.
  • Protrusion is width to thickness ratio
  • Figure 16 shows the relationship between 7? And j8.
  • s 6
  • ⁇ 173.8
  • ⁇ takes the maximum value / J and takes the value 0.565.
  • the cross-sectional shape of the web at this time is shown in FIG.
  • "Aluminum alloy civil engineering structure design 'production guideline draft" by reducing the cross-sectional area of the web by providing one rib (intermediate support)
  • the cross-sectional area of the web can be further reduced by 31%.
  • FIG. 18 (a) shows a cross-sectional shape of a web without ribs.
  • Figure 18 shows the results for a web width b of 2829 mm.
  • the ratio of the area of the cross-sectional shape of FIG. 18 (b) to the area of the cross-sectional shape of FIG. 18 (a) is 0.627, and the ratio of the area of the cross-sectional shape of FIG. 18 (a) to that of FIG.
  • the ratio of the cross-sectional area is 0.464.
  • the “Road Bridge Specification Manual” in the same description I Common Edition ⁇ Steel Bridge Edition it is possible to reduce the cross-sectional area by 37% by providing 1 rib on the web, and 54% by providing 2 rib on the web.
  • the cross-sectional area can be reduced.
  • the present invention is applied to a web without protrusions having a width-thickness ratio of 8 forces.
  • the protrusion is wide and thick
  • FIG. 20 (a) shows the relationship between 7? And j8.
  • ⁇ takes the maximum value / J and takes the value 0.452.
  • the cross-sectional shape of the web at this time is shown in FIG. 20 (a).
  • An aluminum girder with an H-shaped section will be applied to a 20m highway bridge.
  • the width and height of the girders are 400mm and 1400mm, respectively.
  • the effect of light weight by providing the projection described in the present invention on the girder web is shown below.
  • the required cross-sectional second moment for the girder is 1.3 X 10 1C) mm 4 . Since the cross-sectional shape of the girder is shown in Fig. 21 (a), the cross-sectional secondary moment is expressed by the following equation.
  • the type of aluminum alloy is A6061-T6. This aluminum alloy has a 0.2% yield strength of 245 MPa, a Young's modulus of 7.0 X 10 4 MPa, and a Poisson's ratio of 0.3.
  • the width-to-thickness ratio j8 of the web without protrusions is
  • a protrusion having a rectangular cross section is attached to one side of the web. From equation (31),
  • Figure 22 shows the relationship between 7? And j8.
  • the cross-sectional secondary moment of the cross-sectional shape of Fig. 21 (c) is 1. 334X10 lc> mm 4, which is larger than the required cross-sectional secondary moment of 1.3X10 10 mm 4 .
  • Sectional area of the [0174] FIG. 21 (b) is 43220mm 2
  • the cross-sectional area shown in FIG. 21 (c) is 36795mm 2.
  • the ratio of the cross-sectional area of the girders with protrusions to the cross-sectional area of the girders without protrusions is 0.85. Therefore, by attaching a protrusion, the weight is reduced to 15%.
  • a girder having the cross-sectional shape of Fig. 21 (c) can be obtained by friction stir welding (FSW) of a T-shaped extruded profile Example 4
  • Box-shaped aluminum profile is applied to the 4m span column.
  • the inner dimension of the box section is 280 mm X 280 mm.
  • the effect of light weight by providing the projections described in the present invention is shown below.
  • the type of aluminum alloy is A6061-T6. This aluminum alloy has a 0.2% proof stress of 245 MPa, a Young's modulus of 7.0 ⁇ 10 4 MPa, and a Poisson's ratio of 0.3. Protrusive The web width-thickness ratio j8 is
  • a protrusion having a rectangular cross section is attached to one side of the aluminum plate. From equation (31)
  • Sectional area of the [0185] FIG. 23 (a) is 10047mm 2
  • the cross-sectional area of FIG. 23 (b) is a 5565mm 2.
  • the ratio of the cross-sectional area of the column with protrusions to the cross-sectional area of the column without protrusions is 0.55. Therefore, a 45% lighter weight can be achieved by attaching protrusions.
  • Example 5
  • the type of aluminum alloy is A6061-T6. This aluminum alloy has a 0.2% yield strength of 245 MPa, a Young's modulus of 7. OX 10 4 MPa, and a Poisson's ratio of 0.3. Adopt 0.2% resistance against aluminum for buckling strength of rectangular plate. A protrusion with a rectangular cross section is attached to one side of the rectangular plate.
  • the width-thickness ratio ⁇ of the rectangular plate provided with the protrusions is in the following range.
  • FIG. 26 shows the cross-sectional shapes corresponding to points 0, A, B, and C in FIG. Figure 26 shows the results for a plate width b of 128.56mm.
  • Point C is a cross-sectional shape in which r? Is minimized by the first use of the present invention.
  • the present invention is again applied between the protrusion and the end of the rectangular plate.
  • the results are shown by the broken lines in FIG.
  • the protrusion created by the first use of the present invention may buckle as a column of a T-shaped cross section (a black-painted portion) as shown in FIG. If the protrusion may buckle as a column with a T-shaped cross section, it will be necessary to constrain the movement of the protrusion in the out-of-plane direction of the rectangular plate at several points (black dots in Fig. 27) to prevent this. .
  • s is the distance between adjacent protrusions of the rectangular plate obtained by the first use of the present invention.
  • a board separated by a protrusion newly created by the second use of the present invention (when the protrusion is 1 in the first use of the present invention, between the end of the rectangular plate and the protrusion) The total number of elements.
  • Fig. 26 shows the cross-sectional shape for point D where the value of 7?
  • the cross-sectional area of point D is 0.62 times that of point C.
  • SM490Y steel rectangular plate is subjected to compression.
  • the yield stress of SM49 OY steel is 355 MPa
  • Young's modulus is 2.0 X 10 5 MPa
  • Poisson's ratio is 0.3.
  • the yield stress of steel is adopted for the buckling strength of the rectangular plate.
  • a protrusion with a rectangular cross section is attached to one side of the steel plate.
  • 8 of the rectangular plate provided with the protrusions is in the following range.
  • Figure 28 shows the relationship between r? And j8.
  • ⁇ Cross-sectional area of a rectangular plate with protrusions, including protrusions
  • the relationship between 7? And ⁇ in the region above this horizon does not buckle.
  • the cross-sectional shape for point ⁇ is shown in Fig. 29 (b).
  • Fig. 29 (a) shows the cross-sectional shape of a rectangular plate without protrusions.
  • the ratio of the cross-sectional area in Fig. 29 (b) to the cross-sectional area in Fig. 29 (a) is 0.50. Therefore, 50% cross-sectional area can be reduced by providing the protrusions.
  • SM490Y steel rectangular plate receives a shear load (load as shown in Fig. 10) in addition to the bending load.
  • the yield stress of SM490Y steel is 355 MPa, Young's modulus is 2. OX 10 5 MPa, and Poisson's ratio is 0.3.
  • the yield stress of steel is used for the buckling strength of the rectangular plate.
  • a protrusion having a rectangular cross section is attached to one side of the steel plate.
  • equation (31) the coefficient c varies depending on the total number s of plate elements delimited by the protrusions.
  • ⁇ b / t: Width-thickness ratio of rectangular plate with protrusions
  • A Cross-sectional area of a rectangular plate with protrusions, including protrusions
  • r? A / A: Including the protrusion of the rectangular plate with protrusions relative to the cross-sectional area of the rectangular plate without protrusions.
  • A Cross-sectional area of a rectangular plate without protrusions
  • r is the ratio of the bending rigidity of one protrusion to the bending rigidity of the rectangular plate, and is given by Expression (11).
  • Equation (37) Substituting Equation (37) and Equation (41) into Equation (40) and solving for 7?
  • FIG. 30 in the region above the broken line, the rectangular plate with protrusions does not buckle against the shearing force.
  • Figure 31 (b) shows the cross-sectional shape of the rectangular plate with protrusions relative to the dots.
  • Fig. 31 (a) shows the cross-sectional shape of a rectangular plate without projections.
  • the ratio of the cross-sectional area of Fig. 31 (b) to the cross-sectional area of Fig. 31 (a) is 0.54. But Therefore, by providing protrusions, the cross-sectional area can be reduced by 46%.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Panels For Use In Building Construction (AREA)

Abstract

L'invention concerne une mince plaque oblongue présentant sensiblement la même résistance au gauchissement qu'une plaque oblongue sans parties saillantes, et capable d'être produite en utilisant moins de matériau. Elle concerne donc une structure de panneau pour dispositif de transport ou une structure de panneau pour élément structurel de construction, présentant la plaque oblongue, deux ou plus de deux corps supports, et une ou plusieurs parties saillantes, caractérisée en ce que (i) la plaque oblongue est supportée par les deux ou plus de deux corps supports englobant deux corps supports aux extrémités de la plaque, (ii) la ou les parties saillantes sont aménagées au niveau de la plaque oblongue, dans une région prise en sandwich par deux corps supports opposés parmi les deux ou plus ou deux corps supports, (iii) le rapport largeur-épaisseur de la plaque oblongue est supérieur à celui de la plaque oblongue sans parties saillantes, (iv) la somme des zones de coupe transversale de la plaque oblongue et de la ou des parties saillantes est inférieure à celle de la plaque oblongue sans parties saillantes, (v) la plaque oblongue avec la ou les parties saillantes possède sensiblement la même résistance au gauchissement que la plaque oblongue sans parties saillantes, (vi) les positions des parties saillantes se déplacent dans la direction de déformation de concert avec la déformation de gauchissement de la plaque oblongue, et les positions des corps supports ne se déplacent pas en cas de déformation de gauchissement.
PCT/JP2007/060382 2006-05-22 2007-05-21 structure de panneau pour dispositif de transport ou structure de panneau POUR ÉlÉment structurel de construction, ET SON PROCÉDÉ DE FABRICATION WO2007136039A1 (fr)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013509550A (ja) * 2009-10-29 2013-03-14 アーケル・エンジニアリング・アンド・テクノロジー・アクティーゼルスカブ リブによって固定された支持体
CN112900742A (zh) * 2021-01-15 2021-06-04 西南交通大学 一种工形梁

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5254225A (en) * 1975-10-28 1977-05-02 Mitsui Keikinzoku Kako Combination shape material in aluminium
JPH0670927U (ja) * 1993-03-18 1994-10-04 新日本製鐵株式会社 金属製エキスパンド形材
JP2006037577A (ja) * 2004-07-29 2006-02-09 Hitachi Zosen Corp 補剛桁およびその製作方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5254225A (en) * 1975-10-28 1977-05-02 Mitsui Keikinzoku Kako Combination shape material in aluminium
JPH0670927U (ja) * 1993-03-18 1994-10-04 新日本製鐵株式会社 金属製エキスパンド形材
JP2006037577A (ja) * 2004-07-29 2006-02-09 Hitachi Zosen Corp 補剛桁およびその製作方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013509550A (ja) * 2009-10-29 2013-03-14 アーケル・エンジニアリング・アンド・テクノロジー・アクティーゼルスカブ リブによって固定された支持体
CN112900742A (zh) * 2021-01-15 2021-06-04 西南交通大学 一种工形梁

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