JP6888301B2 - Assembly materials, bearing walls, truss beams and beams - Google Patents

Description

The present invention relates to assembly materials, bearing walls, truss beams and beams.

The following Non-Patent Document 1, Patent Document 1 and Patent Document 2 disclose an assembly material formed by combining and joining a plurality of shaped steels. These assembly materials are used for frame members of bearing walls, chord members of truss beams, diagonal members of truss beams, bundles of truss beams, beams and the like.

Supervised by National Institute for Land and Infrastructure Management and Building Research Institute, Ministry of Land, Infrastructure, Transport and Tourism, edited by Japan Iron and Steel Federation, "Guide for Designing Thin Plate Lightweight Shaped Steel Buildings, 2nd Edition"

Japanese Unexamined Patent Publication No. 2005-97914 Japanese Unexamined Patent Publication No. 2001-329653

By the way, it is desired that an assembly material that resists an external force, such as a frame material for a bearing wall or a chord material for a truss beam, has a high resistance to compression and bending.

In consideration of the above facts, it is an object of the present invention to obtain an assembly material capable of improving the yield strength against compression and bending, and to obtain a bearing wall, a truss beam, a beam and a windproof beam.

The assembly material of the first aspect is the first from the web portion, the first flange portion that bends and extends from one end of the web portion in the lateral direction, and the other end of the web portion in the lateral direction. The second flange portion is bent and extended in the same direction as the one flange portion extends, and the extension distance from the web portion is set to be longer than that of the first flange portion, and the web portion in the first flange portion. The first lip portion that bends and extends from the end portion on the opposite side toward the second flange portion side, and the first flange portion side from the end portion of the second flange portion on the side opposite to the web portion. It has a second lip portion that bends and extends toward, and includes a first shape member and a second shape member formed in a long shape, and the first flange portion and the first flange portion of the first shape member. The second flange portion of the two shaped members is joined, and the first flange portion of the second shaped member and the second flange portion of the first shaped member are joined to the second shape member. The web portion, the first flange portion, the second flange portion, and the second flange portion of the first shape member, in a cross-sectional view obtained by cutting the first shape member and the second shape member along a direction orthogonal to the longitudinal direction. A closed cross section is formed between the web portion, the first flange portion, and the second flange portion of the two-shaped member.

According to the assembly material of the first aspect , the first flange portion of the first profile and the second flange portion of the second profile are joined, and the first flange portion and the first form of the second profile are joined. The second flange portion of the material is joined. As a result, the web portion, the first flange portion, the second flange portion, and the second shape of the first shape member are cross-sectionally viewed by cutting the first shape member and the second shape member along the direction orthogonal to the longitudinal direction. A closed cross section is formed between the web portion, the first flange portion, and the second flange portion of the material. Here, in the assembly material of the first aspect , both the first shape member and the second shape member have a first lip portion extending from the first flange portion and a second lip portion extending from the second flange portion. It is provided. As a result, the deformation of the first flange portion and the second flange portion of the first shape member and the second shape member in the out-of-plane direction is restrained by the first lip portion and the second lip portion. In addition to this, a closed cross section is formed between the web portion, the first flange portion and the second flange portion of the first profile and the web portion, the first flange portion and the second flange portion of the second profile. The first flange portion and the second flange portion having a small plate width give rotational resistance to the side portions of the web portion having a large plate width, and restrain the deformation of the web portion in the out-of-plane direction. To do. As a result, in the assembly material of the first aspect , the proof stress against compression and bending can be improved.

In the assembly material of the second aspect, in the assembly material of the first aspect , the first lip portion of the first profile is separated from the web portion of the second profile, and the second profile is formed. The first lip portion of the first shape member is separated from the web portion of the first shape member.

According to the assembly material of the second aspect , by arranging the first lip portion of the first shape member and the second shape member at the above positions, the center of the second flange portion of the first shape member and the second shape member is provided. Deformation of the portion in the out-of-plane direction can be effectively suppressed. Thereby, the proof stress against compression and bending can be further improved.

The assembly material of the third aspect is the first aspect of the assembly material of the first aspect or the second aspect in a cross-sectional view obtained by cutting the first form member and the second form member along a direction orthogonal to the longitudinal direction. The cross-sectional shapes of the profile and the second profile are the same.

According to the assembly material of the third aspect, the assembly material can be formed by using the first shape member and the second shape member which are members having the same cross-sectional shape. As a result, it is possible to reduce the number of types of members required for manufacturing the assembly material, and it is possible to reduce the management labor of construction and manufacturing.

Assembling member of the fourth embodiment, in assembling member according to any one aspect of the first aspect to third aspect, and a second flange portion of the second profile and the first flange portion of the first profile It is joined via a fastening member, and the first flange portion of the second shape member and the second flange portion of the first shape member are joined via a fastening member.

According to the assembly material of the fourth aspect, the assembly material can be easily formed by joining the first shape material and the second shape material by using a fastening member.

Assembly material of the fifth aspect, in the assembly member of any one aspect of the first to fourth embodiments, at least the second lip portion of the second lip portion and the second profile of the first profile One is in contact with the web portion.

According to the assembly material of the fifth aspect , at least one of the second lip portion of the first profile and the second lip portion of the second profile functions as a positioning portion of the second profile with respect to the first profile. Can be done.

In the assembly material of the sixth aspect, in the assembly material of the third aspect , the Young's modulus of the material forming the first profile and the second profile is E (N / mm ² ), and the yield strength of the material is F. When (N / mm ² ), the thickness is t (mm), and the width of the web portion is W0 (mm), the following formula (1) is satisfied.

According to the assembly material of the sixth aspect , the thickness t of the first and second profiles and the width W0 of the web portion of the Young's modulus E and the yield strength F of the material are set within the range satisfying the above formula (1). Has been done. As a result, the deformation of the web portion of the first profile and the second profile in the out-of-plane direction is restrained by the first flange portion and the second flange portion of the first profile and the second profile, and the web portion is concerned. Improves proof stress. As a result, the yield strength of the assembly material against compression and bending can be effectively improved.

In the assembly material of the seventh aspect, in the assembly material of the third aspect , the Young's modulus of the material forming the first shape material and the second shape material is E (N / mm ² ), and the yield strength of the material is F. When (N / mm ² ) is set, the thickness is t (mm), and the width of the second flange portion is W2 (mm), the following formula (2) is satisfied.

According to the assembly material of the seventh aspect, the range in which the thickness t of the first and second profiles and the width W2 of the second flange portion of the Young's modulus E and the yield strength F of the material satisfy the above formula (2). Is set to. As a result, the deformation of the second flange portion in the out-of-plane direction is restrained by the first flange portion and the first lip portion, and the proof stress of the second flange portion is improved. As a result, the yield strength of the assembly material against compression and bending can be effectively improved.

The assembly material of the eighth aspect is the assembly material of the sixth aspect , and the material forming the first profile and the second profile is a steel ^{material having a yield strength F of 280 to 345 N / mm 2.} The following equation (3) is satisfied.

According to the assembly material of the eighth aspect , the thickness t of the first shape member and the second shape member formed by using the steel material and the width W0 of the web portion are set in a range satisfying the above formula (3). .. As a result, the deformation of the web portion of the first profile and the second profile in the out-of-plane direction is restrained by the first flange portion and the second flange portion of the first profile and the second profile, and the web portion is concerned. Improves proof stress. As a result, the yield strength of the assembly material against compression and bending can be effectively improved.

The assembly material of the ninth aspect is the assembly material of the seventh aspect , and the material forming the first profile and the second profile is a steel ^{material having a yield strength F of 280 to 345 N / mm 2.} The following equation (4) is satisfied.

According to the assembly material of the ninth aspect , the thickness t of the first shape member and the second shape member formed by using the steel material and the width W2 of the second flange portion are set in a range satisfying the above formula (4). ing. As a result, the deformation of the second flange portion in the out-of-plane direction is restrained by the first flange portion and the first lip portion, and the proof stress of the second flange portion is improved. As a result, the yield strength of the assembly material against compression and bending can be effectively improved.

The bearing wall of the tenth aspect includes a pair of vertical members extending in the vertical direction at intervals in the horizontal direction, which is a direction orthogonal to the longitudinal direction, and a pair of vertical members extending in the vertical direction at intervals in the vertical direction. A frame material having a plurality of horizontal members for connecting the vertical members in the horizontal direction and a wall surface material joined to the frame material are provided, and at least one of the vertical member and the horizontal member is the first aspect to the first aspect. It is formed by using an assembly member of any one aspect of the ninth embodiment.

According to the bearing wall of the tenth aspect , at least one of the vertical member and the horizontal member forming the frame material is formed by using the assembly member of any one aspect of the first aspect to the ninth aspect. , The bearing capacity of the bearing wall can be effectively improved.

The truss beam of the eleventh aspect includes a pair of upper chord members and lower chord members arranged at intervals in the vertical direction, and a connecting member for connecting the upper chord members and the lower chord members. At least one of the lower chord member and said connecting member is formed with an assembly member of any one aspect of the first aspect to ninth aspect.

According to the truss beam of the eleventh aspect , at least one of the upper chord member, the lower chord member and the connecting member is formed by using the assembly material of any one aspect of the first aspect to the ninth aspect. The strength of the beam can be effectively improved.

The beam of the twelfth aspect is formed by using the assembly material of any one aspect of the first aspect to the ninth aspect , and connects the columns extending in the vertical direction of the building in the vertical direction, and is used in the vertical direction and the horizontal direction of the building. Supports loads in at least one direction.

According to the beam of the twelfth aspect , the bending strength against the load in the vertical direction and the horizontal direction of the building is improved by being formed by using the assembly material of any one aspect of the first aspect to the ninth aspect. be able to.

The assembly material, bearing wall, truss beam and beam according to the present invention have an excellent effect that the yield strength can be improved.

It is sectional drawing which shows the assembly material which concerns on 1st Embodiment. It is sectional drawing which shows the assembly material which concerns on a comparative example. It is sectional drawing which shows the shaped steel which concerns on analysis condition 1. It is sectional drawing which shows the shaped steel which concerns on analysis condition 2. It is sectional drawing which shows the shaped steel which concerns on analysis condition 3. It is a perspective view which shows the analysis model of an assembly material, and shows the state which the compressive load is acting on the assembly material. It is a graph which shows the evaluation result with respect to the compression of an assembly material, and shows the effect by restraining the deformation of a web part by a 1st flange part and a 2nd flange part. It is a graph which shows the evaluation result with respect to the compression of an assembly material, and shows the effect by restraining the deformation of a 2nd flange part by a 1st flange part. It is a perspective view which shows the analysis model of an assembly material, and shows the state which a bending load is acting on the assembly material. It is a table which shows the evaluation result with respect to bending of an assembly material. It is a side view which shows the bearing wall. It is a side view which shows the truss beam. It is a perspective view which shows the skeleton of a building. It is sectional drawing corresponding to FIG. 1 which shows the assembly material which concerns on 2nd Embodiment. It is sectional drawing corresponding to FIG. 1 which shows the assembly material which concerns on 3rd Embodiment. It is sectional drawing corresponding to FIG. 1 which shows the assembly material which concerns on 4th Embodiment.

(Assembly material according to the first embodiment)
The assembly material according to the embodiment of the present invention will be described with reference to FIG.

FIG. 1 shows a cross-sectional view of the elongated assembly member 10 according to the first embodiment cut along a direction orthogonal to the longitudinal direction. As shown in this figure, the assembly material 10 is formed by joining two long lip groove-shaped steels having the same cross-sectional shape and dimensions. In addition, "long shape" means extending in the longitudinal direction of a member. That is, "long" means that the member extends in a specific direction. Further, one of the two lip groove-shaped steels is referred to as the first shaped member 12, and the other is referred to as the second shaped member 14.

The first profile 12 is manufactured by cold-rolling a coil material having a thickness dimension of t, bending molding a plate material having a thickness dimension of t, and the like. Specifically, in the first profile 12, the direction orthogonal to the paper surface in FIG. 1 is the longitudinal direction (arrow Z direction), and the dimension (width dimension) in the lateral direction (arrow Y direction) is W0. A rectangular plate-shaped web portion 16 and a first flange portion 18 extending from one end of the web portion 16 to one side in the thickness direction (arrow X direction) of the web portion 16 by approximately 90 °. It has.

Further, the first shape member 12 bends and extends by substantially 90 ° in the same direction as the direction in which the first flange portion 18 extends from the other end of the web portion 16, and extends substantially parallel to the first flange portion 18. 2 Flange portion 20 is provided. The extension distance W2 of the second flange portion 20 from the web portion 16 (width dimension W2 of the second flange portion 20) is the extension distance W1 of the first flange portion 18 from the web portion 16 (first flange portion 18). It is set longer than the width dimension W1) of.

Further, the first shape member 12 has a first lip portion 22 extending by being bent by approximately 90 ° from an end portion of the first flange portion 18 opposite to the web portion 16 toward the second flange portion 20 side. 2 The flange portion 20 includes a second lip portion 24 that bends and extends by approximately 90 ° from an end portion on the side opposite to the web portion 16 toward the first flange portion 18 side. The extension distance (width dimension) of the first lip portion 22 from the first flange portion 18 and the extension distance (width dimension) of the second lip portion 24 from the second flange portion 20 are the same extension distance W3. (Width dimension W3 of the first lip portion 22 and the second lip portion 24) is set. The extension distance of the first lip portion 22 from the first flange portion 18 and the extension distance of the second lip portion 24 from the second flange portion 20 may be different.

In the second shape member 14, the parts corresponding to the web portion 16, the first flange portion 18, the second flange portion 20, the first lip portion 22, and the second lip portion 24 of the first shape member 12 are respectively the web portion 26. , The first flange portion 28, the second flange portion 30, the first lip portion 32, and the second lip portion 34.

The first shape member 12 and the second shape member 14 are arranged so as to be point-symmetrical with each other in the cross-sectional view shown in FIG. More specifically, in a state where the portion 16A on the first flange portion 18 side of the web portion 16 of the first shape member 12 is in contact with the second lip portion 34 of the second shape member 14, the first shape member 12 is in contact with the second shape member 12. The 1-flange portion 18 and the portion 30A on the second lip portion 34 side of the second flange portion 30 of the second shape member 14 are overlapped with each other. Then, the first flange portion 18 of the first shape member 12 and the portion 30A on the second lip portion 34 side of the second flange portion 30 of the second shape member 14 are connected to each other via a plurality of drill screws 36 as fastening members. It is joined. The plurality of drill screws 36 are arranged in a row at predetermined intervals along the longitudinal direction of the first shape member 12 and the second shape member 14, but are arranged in a plurality of rows or in a staggered pattern. You may be. Further, instead of the drill screw 36, a welded portion, a rivet, a nail or the like as a fastening member may be used.

Further, the first flange of the second shape member 14 is in a state where the part 26A on the first flange part 28 side of the web part 26 of the second shape member 14 is in contact with the second lip portion 24 of the first shape member 12. The portion 28 and the portion 20A on the second lip portion 24 side of the second flange portion 20 of the first profile 12 are overlapped with each other. Then, the first flange portion 28 of the second shape member 14 and the portion 20A on the second lip portion 24 side of the second flange portion 20 of the first shape member 12 are connected to each other via a plurality of drill screws 36 as fastening members. It is joined. The plurality of drill screws 36 are arranged in one row at predetermined intervals along the longitudinal direction of the first shape member 12 and the second shape member 14, but are arranged in a plurality of rows or in a staggered pattern. You may. Further, instead of the drill screw 36, a welded portion, a rivet, a nail or the like as a fastening member may be used.

As described above, the first shape member 12 and the second shape member 14 are joined to the second shape member 14 via a plurality of drill screws 36 (the second shape member 12). The material 14 is fixed to the first shape member 12). As a result, the web portion 16, the first flange portion 18, and the second flange portion 20 of the first shape member 12, and the web portion 26, the first flange portion 28, and the second flange portion 30 of the second shape member 14 A rectangular closed cross section (rectangular tubular portion 38) is formed between them. Further, in a state where the first shape member 12 and the second shape member 14 are joined, the first lip portion 22 of the first shape member 12 is at the center of the second flange portion 30 of the second shape member 14 in the width direction. The first lip portion 32 of the second profile 14 is arranged at the center of the second flange portion 20 of the first profile 12 in the width direction.

(Action and effect of this embodiment)
Next, the operation and effect of this embodiment will be described.

According to the assembly material 10 of the present embodiment described above, both the first shape member 12 and the second shape member 14 constituting the assembly material 10 are made of lip groove-shaped steel. That is, the second lip extending from the first flange portions 18 and 28 and the second lip portion 22 and 32 extending from the second flange portions 20 and 30 on both the first profile portion 12 and the second profile portion 14. Parts 24 and 34 are provided. As a result, the first flange portions 18, 28 and the second flange portions 20, 30 of the first profile portion 12 and the second profile 14 are deformed in the out-of-plane direction, and the first lip portions 22, 32 and the second lip portion are deformed. Restrained by 24, 34. In addition to this, in the present embodiment, the web portion 16, the first flange portion 18, and the second flange portion 20 of the first shape member 12, and the web portion 26, the first flange portion 28, and the second flange portion of the second shape member 14. A closed cross section is formed between the two flange portions 30 and the flange portion 30. As a result, the first flange portions 18, 28 and the second flange portions of the first profile 12 and the second profile 14 having a narrower plate width than the web portions 16 and 26 of the first profile 12 and the second profile 14. 20 and 30 generate rotational resistance in the web portions 16 and 26 of the first profile 12 and the second profile 14, thereby causing the web portions 16 of the first profile 12 and the second profile 14 to generate rotational resistance. It restrains the deformation of 26 in the out-of-plane direction. As a result, in the assembly material 10 of the present embodiment, the proof stress against compression and bending can be improved.

In particular, in the present embodiment, the first lip portion 22 of the first profile 12 is arranged at the center of the second flange portion 30 of the second profile 14 in the width direction, and the second profile 14 The first lip portion 32 is arranged at the center portion in the width direction of the second flange portion 20 of the first shape member 12. In other words, the first lip portion 22 of the first profile 12 is separated from the web portion 26 of the second profile 14, and the first lip portion 32 of the second profile 14 is the first profile 12. It is separated from the web portion 16 of the above. As a result, deformation of the central portions of the second flange portions 20 and 30 of the first profile 12 and the second profile 14 in the out-of-plane direction can be effectively suppressed. As a result, the yield strength against compression and bending can be further improved.

Further, in the present embodiment, the assembly member 10 is joined with two lip groove-shaped steels (first shaped member 12 and second shaped member 14) having the same cross-sectional shape and dimensions (first shaped member 12 and second shaped member 14). It is composed by being assembled). As a result, it is not necessary to manufacture a plurality of types of members, the manufacturing of the assembly material 10 can be facilitated, and the workability when assembling the assembly material 10 with the two lip groove-shaped steels can be improved. .. Further, in the present embodiment, two lip groove-shaped steels (first shaped member 12 and second shaped member 14) are assembled by a drill screw 36. Therefore, at the construction site where the assembly material 10 is used, the assembly material 10 can be assembled by joining a pair of lip groove steels (first shape member 12 and second shape member 14) which are the same members to each other with a drill screw 36. Well, the assembly can be easily managed even at the construction site. Further, in the present embodiment, when the pair of lip groove-shaped steels (first shaped member 12 and second shaped member 14) are joined by the drill screw 36, the first flange portion in the web portion 16 of the first shaped member 12 is formed. The portion 16A on the 18 side is brought into contact with the second lip portion 34 of the second shape member 14, and the portion 26A on the first flange portion 28 side of the web portion 26 of the second shape member 14 is brought into contact with the second shape member 12. By abutting the two lip portions 24, the second shaped member 14 can be positioned with respect to the first shaped member 12 (positioning of the first shaped member 12 with respect to the second shaped member 14). This configuration also makes it possible to easily assemble the assembly material 10.

(Comparison with the assembly material according to the comparative example)
Here, the comparison result of the proof stress against compression of the assembly material 10 of the present embodiment and the assembly material 40 according to the comparative example shown in FIG. 2 will be described.

As shown in FIG. 2, the assembly member 40 according to the comparative example is configured by joining the first shaped member 42, which is a lip groove shaped steel, and the second shaped member 44, which is a light grooved shaped steel. There is.

The web portion 46, the first flange portion 48, the second flange portion 50, the first lip portion 52, and the second lip portion 54 of the first shape member 42 constitute the assembly member 10 (see FIG. 1) of the first embodiment. Web portions 16, 26, first flange portions 18, 28, second flange portions 20, 30, first lip portions 22, 32, and second lip portions 24, 34 of the first profile portion 12 and the second profile portion 14. Corresponds to each. Further, in the assembly material 40 according to the comparative example, the width dimension W4 of the first flange portion 48 of the first shape member 42 and the width dimension W4 of the second flange portion 50 are set to the same dimensions. In this comparative example, the width dimension W4 of the first flange portion 48 and the second flange portion 50 is the second flange portion 20 of the first shape member 12 and the second shape member 14 constituting the assembly member 10 of the first embodiment. , 30 is set to 44.5 mm, which is the same dimension as the width dimension W2. Further, the width dimension W5 of the first lip portion 52 and the second lip portion 54 indicates the first lip portions 22, 32 and the first shape member 12 and the second shape member 14 constituting the assembly member 10 of the first embodiment. The width dimension W3 of the second lip portions 24 and 34 is set to 12 mm, which is the same dimension. The width dimension W1 of the first flange portions 18 and 28 of the first profile portion 12 and the second profile portion 14 constituting the assembly material 10 of the first embodiment is the width dimension W2 × of the second flange portions 20 and 30. It is set to 23.5 mm, which is a dimension different from 1/2.

The second profile 44 does not have the first lip portion 52 and the second lip portion 54 with respect to the first profile 42, and the web portion 56 and the first flange portion of the second profile 44. The 58 and the second flange portion 60 correspond to the web portion 46, the first flange portion 48, and the second flange portion 50 of the first shape member 42, respectively. In this modification, the width dimension W6 of the web portion 56 of the second profile 44 is the width of the web portions 16 and 26 of the first profile 12 and the second profile 14 constituting the assembly member 10 of the first embodiment. It is set to 89 mm, which is the same dimension as the dimension W0. Further, the width dimension W7 of the first flange portion 58 and the second flange portion 60 of the second shape member 44 is the second of the first shape member 12 and the second shape member 14 constituting the assembly member 10 of the first embodiment. The width dimension W2 of the flange portions 20 and 30 is set to 44.5 mm, which is the same dimension.

Then, the maximum proof stress of the member assuming the case where the axial compressive load (load in the longitudinal direction of the assembly material 10 and the assembly material 40) acts on the assembly material 10 according to the first embodiment and the assembly material 40 according to the comparative example is obtained. , Evaluated based on the effective width theory. As a result, as shown in Table 1 below, the first implementation was carried out when the thickness t of the first shaped members 12, 42 and the second shaped members 14, 44 was 2.2 mm and 1.2 mm. It can be seen that the compressive strength of the assembly material 10 according to the form is higher than the compressive strength of the assembly material 40 according to the comparative example. Further, as shown in Table 1 below, in the configuration of the assembly material 10 according to the first embodiment, the compressive proof stress is enhanced even if the cross-sectional area is reduced, as compared with the configuration of the assembly material 40 according to the comparative example. I understand.

(Evaluation result of compressive strength when the thickness of the first profile and the second profile and the width dimension of the first flange and the second flange are changed)
Next, using FIGS. 3A to 5B, the thickness dimensions t of the first shape member 12 and the second shape member 14 and the width dimensions W1 and W2 of the first flange portions 18, 28 and the second flange portions 20 and 30 are changed. The evaluation result by the finite element analysis of the compressive proof stress of the assembled material 10 at the time of making the assembly material 10 will be described.

In this finite element analysis, the first shape member 12 and the second shape member 14 in which the width dimensions W0 to W3 of each part are set to the dimensions shown in FIGS. 3A to 3C and the thickness dimension t is a variable are used. Assembled material 10 was constructed, and a compressive load was applied to the assembled material 10.

Specifically, in the first profile 12 and the second profile 14 shown in FIGS. 3A to 3C, the width dimensions W0 of the web portions 16 and 26 are 100 mm, the first lip portions 22, 32 and the second lip The width dimension W3 of the portions 24 and 34 is set to 10 mm. The width dimensions W1 of the first flange portions 18 and 28 and the width dimensions W2 of the second flange portions 20 and 30 shown in FIG. 3A are 15 mm and 20 mm, respectively. It is set. Further, the width dimensions W1 of the first flange portions 18 and 28 and the width dimensions W2 of the second flange portions 20 and 30 shown in FIG. 3B are 30 mm and 45 mm, respectively. It is set. Further, the width dimensions W1 of the first flange portions 18 and 28 and the width dimensions W2 of the second flange portions 20 and 30 shown in FIG. 3C are 45 mm and 60 mm, respectively. It is set.

As shown in FIG. 4, the assembly member 10 is constructed by using the first shape member 12 and the second shape member 14 shown in FIGS. 3A to 3C, and the first shape member 12 and the second shape member 14 are formed. With the thickness dimension t as a variable, the compressive strength when the compressive load P1 was applied to the assembly 10 was evaluated. In this finite element analysis, the first shape member 12 and the second shape member 14 are joined by a rigid body element instead of the above-mentioned joining by the drill screw 36.

FIG. 5A shows a value obtained by dimensioning the compressive proof stress of the assembly material 10 obtained by the finite element analysis with the existing set proof stress (the compressive proof stress of the assembly material 10 obtained by the finite element analysis and the existing set proof stress). The vertical axis is the ratio of the thickness dimension t to the width dimension W0 of the web portions 16 and 26, multiplied by the square root √ (E / F) of the value obtained by dividing the Young's modulus E by the yield strength F. A graph with the multiplied value as the horizontal axis is shown. For example, as shown in Non-Patent Document 1, the ultimate proof stress of a plate element has a strong correlation with the value obtained by dividing the plate thickness of the plate element by the plate width and multiplying the value obtained by dividing the Young's modulus E by the yield strength F by the square root. Therefore, the influence of the material strength F was eliminated by adopting this index on the horizontal axis of FIG. 5A. The existing set yield strength is the design yield strength calculated based on the description of the North American Specification for the Design of Cold-Formed Steel Structural Members 2007 Edition published by the American Iron and Steel Institute. In the present embodiment, the Young's modulus E is 205 × ¹⁰ 3 N / mm ² as the material for forming the first profile 12 and second profile 14, the yield strength F is set to 280N / mm ^2. Further, the yield strength F refers to the design standard strength defined by the Building Standards Act, or the yield strength of the material obtained from the material test conducted based on the JIS standard Z2241 when there is no design standard strength.

As shown in FIG. 5A, the ratio t / W0 of the thickness dimension t and the width dimension W0 of the web portions 16 and 26 is multiplied by the square root √ (E / F) of the value obtained by dividing the Young's modulus E by the yield strength F. In the range where the value is equal to or less than a predetermined value, it can be seen that as the value becomes smaller, the value obtained by non-dimensionalizing the compressive proof stress of the assembly 10 obtained by the finite element analysis with the existing set proof stress increases. More specifically, the value obtained by multiplying the ratio of the thickness dimension t to the width dimension W0 of the web portions 16 and 26 by the square root √ (E / F) of the value obtained by dividing the Young's modulus E by the yield strength F is obtained. It can be seen that in the range below a predetermined value, the effect that the deformation of the web portions 16 and 26 in the out-of-plane direction is restrained by the first flange portions 18 and 28 and the second flange portions 20 and 30 is remarkably exhibited. .. Specifically, the assembly material 10 is set by setting the thickness dimension t of the first profile 12 and the second profile 14 and the width dimension W0 of the web portions 16 and 26 so as to fall within the range of the following formula 5. The compression strength of the can be effectively increased. In particular, in the case of a thin plate lightweight structure in which the effect of buckling stiffening is greatly exhibited among steel materials, for example, from Non-Patent Document 1, the first shape member 12 and the second shape member 14 have a Young's modulus E of 205 × 10. ³ N / mm ^2, yield the strength F is formed by using a steel plate in the range of 280~345N / mm ^2, so that the scope of formula 6 below, the first profile 12 and second profile By setting the thickness dimension t of 14 and the width dimension W0 of the web portions 16 and 26, the compressive strength of the assembly material 10 can be effectively increased.

Further, FIG. 5B shows a value obtained by non-dimensionalizing the compressive proof stress of the assembly material 10 obtained by the finite element analysis with the existing set proof stress (the compressive proof stress of the assembly material 10 obtained by the finite element analysis and the past). The vertical axis is the ratio to the set yield strength), and the square root √ (E /) of the value obtained by dividing the Young's modulus E by the yield strength F to the ratio t / W2 of the width dimension W2 and the thickness dimension t of the second flange portions 20 and 30. A graph is shown with the value multiplied by F) multiplied by the value on the horizontal axis. As shown in this figure, the square root √ (E / F) of the value obtained by dividing the Young's modulus E by the yield strength F to the ratio t / W2 of the thickness dimension t and the width dimension W2 of the second flange portions 20 and 30. In the range where the multiplied value is equal to or less than a predetermined value, it can be seen that as the value becomes smaller, the value obtained by non-dimensionalizing the compressive proof stress of the assembly 10 obtained by the finite element analysis with the existing set proof stress increases. More specifically, the value obtained by multiplying the ratio t / W2 of the thickness dimension t and the width dimension W2 of the second flange portions 20 and 30 by the square root √ (E / F) of the value obtained by dividing the Young's modulus E by the yield strength F is obtained. In the range below a predetermined value, the effect that the deformation of the second flange portions 20 and 30 in the out-of-plane direction is restrained by the first flange portions 18 and 28 and the first lip portions 22 and 32 is remarkably exhibited. I understand. Specifically, it is assembled by setting the thickness dimension t of the first profile 12 and the second profile 14 and the width dimension W2 of the second flange portions 20 and 30 so as to fall within the range of the following formula 7. The compressive strength of the material 10 can be effectively increased. In particular, considering the specifications of a general-purpose steel material used for a thin plate lightweight structure, the first shape member 12 and the second shape member 14 are formed by using a steel plate having ^{a yield strength F in the range of 280 to 345 N / mm 2.} Therefore, it is assembled by setting the thickness dimension t of the first profile 12 and the second profile 14 and the width dimension W2 of the second flange portions 20 and 30 so as to fall within the range of the following formula 8. The compressive strength of the material 10 can be effectively increased.

When the first profile 12 and the second profile 14 are formed using other metal materials such as aluminum alloy and stainless steel, the other metal plates such as aluminum alloy are used in the above formulas 5 and 7. The Young's modulus E and the yield strength F may be substituted.

(Evaluation result of bending strength when the thickness of the first profile and the second profile and the width dimension of the first flange and the second flange are changed)
Next, using FIGS. 6 and 7, the thickness dimensions t of the first shape member 12 and the second shape member 14 and the width dimensions W1 and W2 of the first flange portions 18, 28 and the second flange portions 20 and 30 are changed. The evaluation result by the finite element analysis of the bending proof stress of the assembling material 10 at the time of making the assembly material 10 will be described.

As shown in FIGS. 6 and 7, in this finite element analysis, the width dimensions W0 to W3 of each part are set to the dimensions shown in FIGS. 3A and 3C, and the thickness dimensions t are 0.4 mm and 2. The assembly material 10 is constructed by using the first shape member 12 and the second shape member 14 set to 6 mm, and as shown in FIG. 6, the first shape member 12 and the second shape member shown in FIGS. 3A to 3C are used. The assembly material 10 was constructed by using the two-shaped member 14, and the bending strength when the bending moment P2 was applied to the assembly material 10 from both ends was evaluated.

As shown in FIG. 7, the bending proof stress of the assembly material 10 obtained by the finite element analysis is higher than the design proof stress regardless of the dimensions of each part of the first shape member 12 and the second shape member 14. It has become. The design proof stress is the bending proof stress obtained by adding the bending proof stress of the first profile 12 single item and the bending proof stress of the second profile 14 single item. This analysis result is the analysis result when the bending moment around the X axis shown in FIG. 1 is applied to both ends of the member, but even when the bending moment around the Y axis is applied, the web of the first shape member 12 Of the web portion 26 of the portion 16 or the second profile 14, the rotational deformation of both side portions of the web portion 26 on the compression edge side causes the first flange portions 18 and 28 of the first profile 12 and the second profile 14. Since it is restrained by the second flange portions 20 and 30, the member strength exceeds the design strength in the same manner as described above. Further, even when the axial force and the bending are combined, the effect that the member proof stress exceeds the design proof stress can be expected.

(Load-bearing wall, truss beam, beam and wind-resistant beam using assembly material 10)
Next, a bearing wall, a truss beam, a beam, and a wind-resistant beam in which the above-mentioned assembly member 10 is used will be described with reference to FIGS. 8 to 10.

(Structure of bearing wall)
FIG. 8 shows a bearing wall 62 used for a framed wall construction method building such as a thin plate lightweight section steel structure. The vertical direction of the building provided with the bearing wall 62 is indicated by an arrow V, and the horizontal direction of the building (direction orthogonal to the vertical direction of the building) is indicated by an arrow H. Further, in the following description, the "vertical direction of the building" and the "horizontal direction of the building" are simply referred to as the "vertical direction" and the "horizontal direction". As shown in FIG. 8, the bearing wall 62 is formed by joining a first wall surface material 66 and a second wall surface material 68 as wall surface materials to a frame member 64 formed in a grid pattern.

The frame member 64 includes a first vertical member 70, a second vertical member 72, and a third vertical member 74 as vertical members extending in the vertical direction at intervals in the horizontal direction, and the first vertical member 70 and the second vertical member. A first horizontal member 76 and a second horizontal member 78 are provided as horizontal members that connect the upper end and the lower end of the 72 and the third vertical member 74 in the horizontal direction, respectively. Further, the frame member 64 includes a first intermediate horizontal member 80 as a horizontal member connecting the central portion in the vertical direction of the first vertical member 70 and the central portion in the vertical direction of the second vertical member 72 in the vertical direction, and a second vertical member. A second intermediate cross member 82 as a cross member for horizontally connecting the central portion of the member 72 in the vertical direction and the central portion of the third vertical member 74 in the vertical direction is provided.

Further, the first wall surface material 66 closes the area surrounded by the first vertical member 70, the second vertical member 72, the first horizontal member 76, and the second horizontal member 78 in the frame material 64. The second wall surface member 68 closes the area surrounded by the second vertical member 72, the third vertical member 74, the first horizontal member 76, and the second horizontal member 78 in the frame material 64. It is joined to the first vertical frame 70, the second vertical frame 72, the third vertical frame 74, the first horizontal member 78, and the second horizontal member 76.

Then, in the present embodiment, the assembly member 10 of the present embodiment is applied to the first vertical member 70 and the third vertical member 74 on which a large compressive load acts when a load in the horizontal direction is applied to the building provided with the bearing wall 62. Is used. The portion of the frame member 64 in which the assembly member 10 of the present embodiment is used is not limited to this configuration, and may be appropriately set in consideration of the dimensions of the bearing wall 62, the load acting on the bearing wall 62, and the like. Further, in the portion of the frame member 64 in which the assembly member 10 of the present embodiment is used, it is desirable that the H direction shown in FIG. 8 and the X direction shown in FIG. 1 coincide with each other.

(Structure of truss beam)
FIG. 9 shows a truss beam 86 spanned between the upper parts of a pair of column members 84. As shown in this figure, the truss beam 86 connects (connects) the upper chord member 88 and the lower chord member 90 extending in the horizontal direction at intervals in the vertical direction, and the upper chord member 88 and the lower chord member 90 in the vertical direction. It is provided with a plurality of connecting members 92. The plurality of connecting members 92 are arranged so as to be inclined in the vertical direction and substantially W-shaped along the horizontal direction. The connecting member 92 does not necessarily have to be inclined, and may be orthogonal to the upper chord member 88 and the lower chord member 90. Further, the upper chord member 88 and the lower chord member 90 and the connecting member 92 are joined by welding, a drill screw, a rivet or the like. Then, in the present embodiment, the assembly member 10 of the present embodiment is used for at least one of the plurality of connecting members 92, or at least one of the upper chord member 88 and the lower chord member 90. The portion of the truss beam 86 in which the assembly member 10 of the present embodiment is used is not limited to this configuration, and may be appropriately set in consideration of the load acting on the truss beam 86 and the like. The assembly material 10 of the present embodiment can also be used as the pillar material 84. Further, in the portion of the truss beam 86 in which the assembly member 10 of the present embodiment is used, it is desirable that the directions orthogonal to the V direction and the H direction shown in FIG. 9 and the Y direction shown in FIG. 1 coincide with each other.

(Beam composition)
FIG. 10 shows the main structural members 94 of the building. As shown in this figure, the main structural member 94 of the building includes a plurality of column members 84 extending in the vertical direction of the building. Further, the main structural member 94 of the building includes a plurality of beams 96 that horizontally connect the upper ends of the predetermined column members 84 among the plurality of column members 84. The brace 100 is a member that diagonally connects the pillar members 84 that are adjacent to each other in the horizontal direction. The structural type of the building may be a wall type structure, and in the case of the wall type structure, the face material 68 shown in FIG. 8 corresponds to the brace 100 in FIG. 10, and the vertical members 70 and 74 shown in FIG. Is a structural member corresponding to the pillar member 84 shown in FIG. Then, in the present embodiment, the assembly material 10 of the present embodiment is used as the beam 96 that supports the load in the vertical direction and the horizontal direction of the building. In the case of the brace structure, the assembly member 10 of the present embodiment can be used as the pillar member 84 or the brace 100.

(Assembly material according to the second to fourth embodiments)
Next, the assembly materials according to the second to fourth embodiments of the present invention will be described with reference to FIGS. 11A to 11C. The members and parts corresponding to the assembly member 10 according to the above-described first embodiment are designated by the same reference numerals as the corresponding members and parts, and the description thereof will be omitted.

As shown in FIGS. 11A and 11B, in the assembly material 102 of the second embodiment and the assembly material 104 of the third embodiment, the width dimension W2 and the second shape member of the second flange portion 20 of the first shape member 12 The width dimension W2 of the second flange portion 30 of 14 is set to a different dimension. Further, as shown in FIG. 11A, in the assembly member 102 of the second embodiment, the portion 16A on the first flange portion 18 side of the web portion 16 of the first profile portion 12 and the second lip portion of the second profile portion 14 The portion 26A on the first flange portion 28 side of the web portion 26 of the second shape member 14 and the second lip portion 24 of the first shape member 12 are separated from each other. On the other hand, as shown in FIG. 11B, in the assembly member 104 according to the third embodiment, the portion 16A on the first flange portion 18 side of the web portion 16 of the first profile portion 12 and the second profile portion 14 The two lip portions 34 are separated from each other, and the portion 26A on the first flange portion 28 side of the web portion 26 of the second shape member 14 and the second lip portion 24 of the first shape member 12 are in contact with each other. As described above, whether or not the first lip portions 22, 32 and the second lip portions 24, 34 of the first shape member 12 and the second shape member 14 are brought into contact with other portions is determined by assembling materials 102, 104. It may be set appropriately in consideration of the assembly process and the like.

Further, as in the assembly material 106 of the fourth embodiment shown in FIG. 11C, the portion 16A on the first flange portion 18 side of the web portion 16 of the first profile portion 12 and the second lip portion of the second profile portion 14. In addition to the contact with the 34, the portion 26A on the first flange portion 28 side of the web portion 26 of the second profile 14 and the second lip portion 24 of the first profile 12 are in contact with each other. , The portion 16B on the second flange portion 20 side of the web portion 16 of the first shape member 12 and the first lip portion 32 of the second shape member 14 are in contact with each other, and the web portion 26 of the second shape member 14 The portion 26B on the side of the second flange portion 30 may be in contact with the first lip portion 22 of the first shape member 12.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above, and can be modified in various ways other than the above within a range not deviating from the gist thereof. Of course.

10 Assembly material 12 1st shape member 14 2nd shape member 16 Web part 18 1st flange part 20 2nd flange part 22 1st lip part 24 2nd lip part 26 Web part 28 1st flange part 30 2nd flange part 32 1st lip part 34 2nd lip part 36 Drill screw (fastening member)
62 Bearing wall 64 Frame material 66 First wall material (wall material)
68 Second wall material (wall material)
70 1st vertical material (vertical material)
72 Second vertical material (vertical material)
74 Third vertical material (vertical material)
76 1st cross member (horizontal member)
78 Second cross member (horizontal member)
80 1st intermediate cross member (cross member)
82 Second intermediate cross member (cross member)
86 Truss beam 88 Upper chord material 90 Lower chord material 92 Connecting material 96 Beam 102 Assembly material 104 Assembly material 106 Assembly material

Claims (13)

Same as the web portion, the first flange portion that bends and extends from one end of the web portion in the lateral direction, and the direction in which the first flange portion extends from the other end of the web portion in the lateral direction. From the second flange portion that bends and extends in the direction and has a longer extension distance from the web portion than the first flange portion, and from the end portion of the first flange portion that is opposite to the web portion. A first lip portion that bends and extends toward the second flange portion side, and a second that bends and extends toward the first flange portion side from an end portion of the second flange portion that is opposite to the web portion. It has two lip portions, and includes a first shape member and a second shape member formed in a long shape.
The first flange portion of the first profile and the second flange portion of the second profile are joined, and the first flange portion of the second profile and the first flange portion of the first profile are joined. By joining the two flange portions, the web portion of the first profile and the web portion of the first profile can be viewed in a cross-sectional view in which the first profile and the second profile are cut along a direction orthogonal to the longitudinal direction. An assembly material in which a closed cross section is formed between the first flange portion and the second flange portion, the web portion of the second shape member, the first flange portion and the second flange portion. The first lip portion of the first profile is separated from the web portion of the second profile, and the first lip portion of the second profile is the web portion of the first profile. The assembly material according to claim 1, which is separated from the portion. The cross-sectional shapes of the first shape member and the second shape member are the same in a cross-sectional view obtained by cutting the first shape member and the second shape member along a direction orthogonal to the longitudinal direction. The assembly material according to claim 1 or 2. The first flange portion of the first profile and the second flange portion of the second profile are joined via a fastening member, and the first flange portion of the second profile and the first flange portion are joined. The assembly material according to any one of claims 1 to 3, wherein the second flange portion of the profile is joined via a fastening member. According to any one of claims 1 to 4, at least one of the second lip portion of the first profile and the second lip portion of the second profile is in contact with the web portion. The assembly material described. The Young's modulus of the first profile and the material forming the second profile is E (N / mm ² ), the yield strength of the material is F (N / mm ² ), and the thickness is t (mm). The assembly material according to claim 3, which satisfies the following formula (1) when the width of the web portion is W0 (mm).

The Young's modulus of the first profile and the material forming the second profile is E (N / mm ² ), the yield strength of the material is F (N / mm ² ), and the thickness is t (mm). The assembly material according to claim 3, which satisfies the following formula (2) when the width of the second flange portion is W2 (mm).

The assembly material according to claim 6, wherein the first profile and the material forming the second profile are steel materials having a material yield strength F of 280 to 345 N / mm ² , and satisfy the following formula (3). ..

The assembly material according to claim 7, wherein the first profile and the material forming the second profile are steel materials having a material yield strength F of 280 to 345 N / mm ² , and satisfy the following formula (4). ..

In the first profile, the width of the first lip portion is 10% of the width of the web portion.
The assembly material according to any one of claims 1 to 9, wherein in the second profile, the width of the first lip portion is 10% of the width of the web portion. A pair of vertical members extending in the vertical direction with an interval in the horizontal direction, which is a direction orthogonal to the longitudinal direction, and a pair of vertical members extending in the vertical direction with an interval in the vertical direction, and connecting the pair of vertical members in the horizontal direction. A frame material with multiple cross members and
The wall surface material joined to the frame material and
With
A bearing wall in which at least one of the vertical member and the horizontal member is formed by using the assembly material according to any one of claims 1 to 10. A pair of upper chord members and lower chord members arranged at intervals in the vertical direction, and a connecting member for connecting the upper chord members and the lower chord members are provided.
A truss beam in which at least one of the upper chord member, the lower chord member, and the connecting member is formed by using the assembly material according to any one of claims 1 to 10. It is formed by using the assembly material according to any one of claims 1 to 10 , and connects the columns extending in the vertical direction of the building in the horizontal direction so as to be in at least one direction in the vertical direction and the horizontal direction of the building. A beam that supports the load.

Images