Reinforcement structure of lattice structure material

Abstract

To increase an axial strength of lattice structure materials while improving workability.SOLUTION: Reinforcement structure of a lattice structure material comprises a pair of upper chord material 40 and lower chord material 50 facing each other, a plurality of lattice materials 60 installed diagonally across the pair of upper chord material 40 and lower chord material 50, a pair of gusset plates 26A, 26B provided at both longitudinal ends of the pair of upper chord material 40 and lower chord material 50, and a pair of reinforcing materials 70 which are arranged along the longitudinal direction of the upper chord material 40 and lower chord material 50 on both sides of the plurality of lattice materials 60 and whose longitudinal ends are bolted together with the pair of gusset plates 26A, 26B sandwiched therebetween.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a reinforcing structure for a lattice structural material. [Background technology]

[0002] In a load-bearing frame having left and right pillar members, upper and lower frame members, and multiple diagonal members installed on the left and right pillar members, a pair of flat plate-like members is known that sandwich the load-bearing frame from both sides and are connected to the centers of the upper and lower frame members and the centers of the multiple diagonal members (see, for example, Patent Document 1).

[0003] In addition, in lattice columns, a channel that connects all the diagonal members arranged in the vertical direction is known (see, for example, Patent Document 2).

[0004] Furthermore, a reinforcing structure for reinforcing existing lattice columns and lattice beams is known (see, for example, Patent Document 3). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-191854 [Patent Document 2] Japanese Patent Application Publication No. 2017-223101 [Patent Document 3] Japanese Patent Application Laid-Open No. 2017-166170 Summary of the Invention [Problem to be solved by the invention]

[0006] Incidentally, a possible reinforcing structure for increasing the axial strength of lattice structural members such as lattice beams and lattice columns is to weld steel plates to both side surfaces of the lattice structural member.

[0007] However, this reinforcement structure requires steel plates to be welded all around the sides of the lattice structural material, which makes attaching the steel plates time-consuming.

[0008] In consideration of the above, the present invention aims to increase the axial strength of lattice structural materials while improving workability. [Means for solving the problem]

[0009] The reinforcing structure of a lattice structural material described in claim 1 comprises a pair of opposing chord members, a plurality of lattice members installed diagonally across the pair of chord members, a pair of gusset plates provided at both longitudinal ends of the pair of chord members, and a pair of reinforcing members arranged along the longitudinal direction of the chord members on both sides of the plurality of lattice members, and bolted to both longitudinal ends with the pair of gusset plates sandwiched between them.

[0010] According to the reinforcing structure for a lattice structural member of claim 1, a pair of chord members face each other. A plurality of lattice members are diagonally installed between the pair of chord members. A pair of gusset plates is provided at both longitudinal ends of the pair of chord members.

[0011] Here, a pair of reinforcing members is placed on both sides of the multiple lattice members along the longitudinal direction of the chord members. The longitudinal ends of the pair of reinforcing members are bolted together with a pair of gusset plates sandwiched between them. This pair of reinforcing members connects the pair of gusset plates provided at the longitudinal ends of the pair of chord members. As a result, axial force is transmitted between the pair of gusset plates via the pair of reinforcing members, thereby increasing the axial strength of the lattice structural member.

[0012] In addition, the longitudinal ends of the pair of reinforcing members are bolted together with a pair of gusset plates sandwiched between them, as described above. This improves the workability of the pair of reinforcing members compared to when steel plates are welded all around the sides of the lattice structural material.

[0013] In this way, the present invention can improve workability while increasing the axial strength of the lattice structural material.

[0014] The reinforcing structure for a lattice structural material according to claim 2 is the reinforcing structure for a lattice structural material according to claim 1, in which the pair of reinforcing members are structurally separated from the plurality of lattice materials.

[0015] According to the reinforcing structure of the lattice structural material of claim 2, the pair of reinforcing members are structurally separated from the plurality of lattice materials. In other words, in this invention, the pair of reinforcing members are not joined to the plurality of lattice materials. Therefore, the workability of the pair of reinforcing members is further improved.

[0016] The reinforcing structure for a lattice structural material described in claim 3 is the reinforcing structure for a lattice structural material described in claim 1 or claim 2, in which the reinforcing member has a plurality of divided reinforcing members divided in the longitudinal direction, and the divided reinforcing members adjacent in the longitudinal direction of the reinforcing member are bolted together via a connecting plate.

[0017] According to the reinforcing structure for a lattice structural material of claim 3, the reinforcing member has a plurality of divided reinforcing members divided in the longitudinal direction. The divided reinforcing members adjacent in the longitudinal direction of the reinforcing member are connected by bolts via a connecting plate.

[0018] Dividing the reinforcing member into multiple separate reinforcing members in this way improves the transportability of the separate reinforcing members. Furthermore, by connecting adjacent separate reinforcing members in the longitudinal direction of the reinforcing member with bolts via a connecting plate, adjacent separate reinforcing members in the longitudinal direction of the reinforcing member can be easily joined. Therefore, the workability of the reinforcing member is improved. [Effects of the Invention]

[0019] As described above, according to the present invention, it is possible to increase the axial strength of a lattice structural material while improving workability. [Brief explanation of the drawings]

[0020] [Figure 1] 1 is an elevation view showing a frame having a lattice beam to which a reinforcing structure of a lattice structural material according to one embodiment is applied. [Figure 2] 2 is a partially enlarged elevational view showing one longitudinal end of the lattice beam shown in FIG. 1. FIG. [Figure 3] 2 is a partially enlarged elevational view showing the other longitudinal end of the lattice beam shown in FIG. 1. FIG. [Figure 4] FIG. 4 is a cross-sectional view taken along line 4-4 in FIG. 2. [Figure 5] FIG. 5 is a cross-sectional view taken along line 5-5 in FIG. 2. [Figure 6] 2 is a partially enlarged elevational view showing a connecting portion of the reinforcing member shown in FIG. 1. FIG. [Figure 7] FIG. 7 is a cross-sectional view taken along line 7-7 in FIG. 6. DETAILED DESCRIPTION OF THE INVENTION

[0021] Hereinafter, an embodiment will be described with reference to the drawings.

[0022] (frame) Fig. 1 shows a frame 10 equipped with a lattice beam 30 to which the reinforcement structure of the lattice structural material according to this embodiment is applied. The frame 10 is equipped with a pair of lattice columns 20A, 20B and a lattice beam 30 installed diagonally across the pair of lattice columns 20A, 20B. The lattice columns 20A, 20B are an example of columns.

[0023] (lattice column) A pair of lattice columns 20A, 20B are arranged opposite each other. Each lattice column 20A, 20B is formed in a rectangular cross section. Each lattice column 20A, 20B has a plurality of chord members 22 arranged at each corner in plan view, and a plurality of lattice members 24 installed diagonally between adjacent chord members 22.

[0024] A pair of gusset plates 26A, 26B are joined to the pair of lattice columns 20A, 20B, which are provided at both longitudinal ends of the lattice beam 30. In other words, a pair of gusset plates 26A, 26B are provided to the pair of lattice columns 20A, 20B, to which both longitudinal ends of the lattice beam 30 are joined.

[0025] As shown in Fig. 2, one gusset plate 26A is joined to the upper end of one lattice column 20A. The one gusset plate 26A is made of a steel plate or the like, and is arranged along the material axis direction of the lattice column 20A and the lattice beam 30. This one gusset plate 26A extends from the one lattice column 20A toward the other lattice column 20B.

[0026] 3, the other gusset plate 26B is provided at the middle portion in the material axis direction of the other lattice column 20B. In other words, the other gusset plate 26B is disposed lower than the one gusset plate 26B.

[0027] The other gusset plate 26B is formed of a steel plate or the like, and is arranged along the material axis direction of the lattice column 20B and the lattice beam 30, and is arranged in the same plane as the one gusset plate 26B. In addition, the other gusset plate 26B extends from the other lattice column 20B toward the one lattice column 20A.

[0028] The columns are not limited to the lattice columns 20A and 20B, but may be made of steel pipes, H-shaped steel, or other steel-framed structures, or may be made of reinforced concrete or steel-framed reinforced concrete.

[0029] (lattice beam) 1, the lattice beam 30 is, as an example, a roof beam (inclined beam) installed diagonally on a pair of lattice columns 20A, 20B. This lattice beam 30 has an upper chord member 40 and a lower chord member 50 that face each other in the beam configuration direction, a plurality of lattice members 60 installed diagonally on the upper chord member 40 and the lower chord member 50, and a pair of reinforcing members 70 arranged on both sides of the plurality of lattice members 60.

[0030] The lattice beam 30 is not limited to an inclined beam, but may be, for example, a substantially horizontal beam. The lattice beam 30 is not limited to a roof beam, but may be, for example, a beam that supports a floor. The upper chord member 40 and the lower chord member 50 are an example of a pair of chord members.

[0031] The upper chord member 40 is arranged along the longitudinal direction of the lattice beam 30. The upper chord member 40 has a pair of shaped steel members 42 arranged back to back.

[0032] 4, the pair of structural steels 42 are formed by, for example, L-shaped steels (angle steels). Each structural steel 42 has a web portion 42W and a flange portion 42F that protrudes from one end (upper end) of the web portion 42W in the vertical direction. The pair of structural steels 42 are arranged along the longitudinal direction of the lattice beam 30, with the web portions 42W facing each other in the beam width direction of the lattice beam 30.

[0033] The pair of structural steels 42 are not limited to L-shaped steels, and may be formed of channel steels, for example.

[0034] The lower chord member 50 is arranged along the longitudinal direction of the lattice beam 30. The lower chord member 50 is also arranged below the upper chord member 40 and approximately parallel to the upper chord member 40. The lower chord member 50 has a pair of structural steels 52 arranged back-to-back.

[0035] The pair of structural steels 52 are formed by, for example, L-shaped steels (angle steels). Each structural steel 52 has a web portion 52W and a flange portion 52F that protrudes from one end (lower end) of the web portion 52W in the vertical direction. The pair of structural steels 52 are arranged along the longitudinal direction of the lattice beam 30, with the web portions 52W facing each other in the beam width direction of the lattice beam 30.

[0036] The pair of structural steels 52 are not limited to L-shaped steels, and may be formed of channel steels, for example.

[0037] 1, a pair of gusset plates 26A, 26B are provided at both longitudinal ends of the upper chord member 40 and the lower chord member 50. In other words, a pair of gusset plates 26A, 26B are joined to both longitudinal ends of the upper chord member 40 and the lower chord member 50.

[0038] 2 and 5, the web portions 42W of a pair of structural steels 42 that make up one longitudinal end of the upper chord member 40 sandwich the upper end side of one gusset plate 26A. The web portions 42W are joined to the upper chord member 40 and one gusset plate 26A by bolts 44 and nuts 46 that pass through the web portions 42W and one gusset plate 26A in the thickness direction.

[0039] Similarly, the web portions 52W of a pair of structural steels 52 that make up one longitudinal end of the lower chord member 50 sandwich the lower end side of one gusset plate 26A. The web portions 52W are joined to the lower chord member 50 and one gusset plate 26A by bolts 54 and nuts 56 that pass through the web portions 52W and one gusset plate 26A in the thickness direction.

[0040] 3, the web portions 42W of the pair of structural steels 42 that make up the other longitudinal end of the upper chord member 40 sandwich the upper end side of the other gusset plate 26B. The web portions 42W and the other gusset plate 26B are joined to the upper chord member 40 and the other gusset plate 26B by bolts 44 and nuts 46 that pass through the web portions 42W and the other gusset plate 26B in the thickness direction.

[0041] Similarly, the web portions 52W of the pair of structural steels 52 that make up the other longitudinal end of the lower chord 50 sandwich the upper end side of the other gusset plate 26B. The web portions 52W and the other gusset plate 26B are joined to the lower chord 50 and the other gusset plate 26B by bolts 54 and nuts 56 that pass through the web portions 52W and the other gusset plate 26B in the thickness direction.

[0042] The upper chord member 40 and the lower chord member 50 and the pair of gusset plates 26A, 26B are not limited to being joined by bolts, but may also be joined by welding, for example. Furthermore, the upper chord member 40 and the lower chord member 50 are not limited to being joined by a pair of structural steels 42, 52, but may also be formed by, for example, a single T-shaped steel or the like.

[0043] (lattice material) 2 and 3, the multiple lattice members 60 are formed from steel plates (flat bars) or the like. These lattice members 60 are installed diagonally between the upper chord member 40 and the lower chord member 50, and in a zigzag pattern when viewed from the width direction of the lattice beam 30. The upper end of each lattice member 60 is bolted to the upper chord member 40, and the lower end is bolted to the lower chord member 50.

[0044] Specifically, as shown in Figure 4, the upper end of the lattice material 60 is sandwiched between the web portions 42W of a pair of structural steels 42 that make up the upper chord member 40. The upper end of the lattice material 60 and the upper chord member 40 are joined by bolts 62 and nuts 64 that penetrate the upper end of the lattice material 60 and the web portions 42W of the pair of structural steels 42 in the thickness direction.

[0045] Similarly, the lower end of the lattice material 60 is sandwiched between the web portions 52W of a pair of structural steels 52 that make up the lower chord member 50. The lower end of the lattice material 60 and the lower chord member 50 are joined by bolts 62 and nuts 64 that pass through the lower end of the lattice material 60 and the web portions 52W of the pair of structural steels 52 in the thickness direction.

[0046] The upper chord members 40 and lower chord members 50 may be joined to the lattice members 60 by means of not only bolts but also welding, for example.

[0047] (reinforcing member) As shown in Fig. 1, the pair of reinforcing members 70 are reinforcing members that increase the axial strength of the lattice beam 30. When the lattice beam 30 is viewed from the beam width direction, the pair of reinforcing members 70 are arranged along the longitudinal direction of the lattice beam 30 between the upper chord member 40 and the lower chord member 50.

[0048] 5, a pair of reinforcing members 70 are arranged back-to-back on both sides in the beam width direction of the multiple lattice members 60. The pair of reinforcing members 70 are not joined to the multiple lattice members 60, and are structurally separated from these lattice members 60.

[0049] As shown in Fig. 1, the reinforcing member 70 has a plurality of (three in this embodiment) divided reinforcing members 72 divided in the longitudinal direction. As shown in Figs. 4 and 5, the divided reinforcing members 72 are formed, for example, from channel steel. Each divided reinforcing member 72 has a web portion 72W and a pair of flange portions 72F that protrude from both ends of the web portion 72W in the vertical direction and face each other in the beam configuration direction of the lattice beam 30.

[0050] The divided reinforcing members 72 are not limited to channel steel, and may be formed of angle steel, for example.

[0051] The pair of reinforcing members 70 are arranged with the web portions 72W of each divided reinforcing member 72 facing each other in the beam width direction of the lattice beam 30. As shown in Figures 2 and 3, both longitudinal ends of the pair of reinforcing members 70 are bolted together with a pair of gusset plates 26A, 26B sandwiched between them.

[0052] 5, the web portion 72W of the divided reinforcing member 72 constituting one longitudinal end of the pair of reinforcing members 70 sandwiches one gusset plate 26A from both sides in the thickness direction. The one longitudinal end of the pair of reinforcing members 70 and one gusset plate 26A are joined together by a plurality of bolts 74 and nuts 76 that penetrate the web portion 72W of the divided reinforcing member 72 and one gusset plate 26A in the thickness direction.

[0053] 3, the web portion 72W of the divided reinforcing member 72 constituting the other longitudinal end portion of the pair of reinforcing members 70 sandwiches the other gusset plate 26B from both sides in the thickness direction. The other longitudinal end portion of the pair of reinforcing members 70 and the other gusset plate 26B are joined together by a plurality of bolts 74 and nuts that penetrate the web portion 72W of the divided reinforcing member 72 and the other gusset plate 26B in the thickness direction.

[0054] (Spelling material) 6, adjacent split reinforcing members 72 in the longitudinal direction of a pair of reinforcing members 70 are bolted together via a spelling plate 80. The spelling plate 80 is formed of a steel plate or the like. One of the adjacent split reinforcing members 72 in the longitudinal direction of the reinforcing member 70 is bolted to one end of the spelling plate 80, and the other adjacent split reinforcing member 72 in the longitudinal direction of the reinforcing member 70 is bolted to the other end of the spelling plate 80.

[0055] In other words, the ends of one of the divided reinforcing members 72 adjacent to each other in the longitudinal direction of the reinforcing member 70 are bolted together with one end of the spelling plate 80 sandwiched therebetween. Also, the ends of the other divided reinforcing member 72 adjacent to each other in the longitudinal direction of the reinforcing member 70 are bolted together with the other end of the spelling plate 80 sandwiched therebetween.

[0056] 7, the web portion 72W of one of the split reinforcing members 72 adjacent to each other in the longitudinal direction of the reinforcing member 70 sandwiches one end of the spelling plate 80. The split reinforcing member 72 and the spelling plate 80 are joined together by a plurality of bolts 82 and nuts 84 that penetrate the web portion 72W of the split reinforcing member 72 and the spelling plate 80 in the thickness direction.

[0057] 6, the web portion 72W of the other divided reinforcing member 72 adjacent to the reinforcing member 70 in the longitudinal direction sandwiches the other end side of the spelling plate 80. The other divided reinforcing member 72 and the spelling plate 80 are joined by a plurality of bolts 82 and nuts that penetrate the web portion 72W of the divided reinforcing member 72 and the spelling plate 80 in the thickness direction.

[0058] (action) Next, the operation of this embodiment will be described.

[0059] As shown in Figure 1, in the reinforcement structure of the lattice structural material according to this embodiment, a lattice beam 30 is installed on a pair of lattice columns 20A, 20B. This lattice beam 30 includes a pair of upper chord members 40 and lower chord members 50, a plurality of lattice members 60, a pair of gusset plates 26A, 26B, and a pair of reinforcing members 70.

[0060] The pair of upper chord members 40 and lower chord members 50 face each other in the beam configuration direction of the lattice beam 30. A plurality of lattice members 60 are installed diagonally between the pair of upper chord members 40 and lower chord members 50. A pair of gusset plates 26A, 26B are provided at both longitudinal ends of the pair of upper chord members 40 and lower chord members 50. The pair of gusset plates 26A, 26B are joined to the pair of lattice columns 20A, 20B.

[0061] Here, as shown in Fig. 4, a pair of reinforcing members 70 are arranged on both sides of the multiple lattice members 60 along the longitudinal direction of the upper chord member 40 and the lower chord member 50. As shown in Figs. 2, 3, and 5, both longitudinal ends of the pair of reinforcing members 70 are bolted together with a pair of gusset plates 26A, 26B sandwiched between them. This pair of reinforcing members 70 connects the pair of gusset plates 26A, 26B provided at both longitudinal ends of the pair of upper chord members 40 and the lower chord members 50.

[0062] As a result, during an earthquake, axial force is transmitted from the pair of lattice columns 20A, 20B to the lattice beam 30 via the pair of gusset plates 26A, 26B. At this time, the axial force is transmitted between the pair of gusset plates 26A, 26B via the pair of reinforcing members 70, thereby increasing the axial strength of the lattice beam 30.

[0063] As described above, both longitudinal ends of the pair of reinforcing members 70 are bolted together with the pair of gusset plates 26A, 26B sandwiched therebetween. This improves the workability of the pair of reinforcing members 70 in this embodiment compared to when steel plates are welded all around the side surfaces of both sides of the lattice beam 30.

[0064] In this way, in this embodiment, the axial strength of the lattice beam 30 can be increased while improving workability.

[0065] Furthermore, the pair of reinforcing members 70 are structurally separated from the plurality of lattice materials 60. In other words, in this embodiment, the pair of reinforcing members 70 are not joined to the plurality of lattice materials 60. Therefore, the workability of the pair of reinforcing members 70 is further improved.

[0066] 6 and 7, the reinforcing member 70 has a plurality of divided reinforcing members 72 that are divided in the longitudinal direction. The divided reinforcing members 72 that are adjacent in the longitudinal direction of the reinforcing member 70 are joined by bolts via a connecting plate 80.

[0067] Dividing the reinforcing member 70 into a plurality of divided reinforcing members 72 in this manner improves the transportability, etc. of the divided reinforcing members 72. Furthermore, by bolting adjacent divided reinforcing members 72 in the longitudinal direction of the reinforcing member 70 via the connecting plates 80, adjacent divided reinforcing members 72 in the longitudinal direction of the reinforcing member 70 can be easily joined. Therefore, the workability of the reinforcing member 70 is improved.

[0068] Furthermore, the divided reinforcing members 72 are formed of channel steel. As a result, buckling of the web portions 72W is suppressed by the flange portions 72F of the divided reinforcing members 72. Therefore, the axial strength of the lattice beam 30 can be efficiently increased.

[0069] (Variation) Next, a modification of the above embodiment will be described.

[0070] In the above embodiment, the reinforcing member 70 is divided in the longitudinal direction into a plurality of divided reinforcing members 72. However, the reinforcing member 70 may be formed from a single channel steel or L-shaped steel.

[0071] In addition, in the above embodiment, the lattice structural material is the lattice beam 30. However, the lattice structural material is not limited to the lattice beam 30, and may be, for example, a lattice column. Specifically, for example, a pair of gusset plates may be provided at both ends in the material axis direction of the lattice column 20A shown in Fig. 1, and a pair of reinforcing members 70 may be applied to each side of the lattice column 20A.

[0072] Although one embodiment of the present invention has been described above, the present invention is not limited to such an embodiment, and one embodiment and various modified examples may be used in appropriate combination, and it goes without saying that the present invention can be implemented in various forms as long as it does not deviate from the gist of the present invention. [Explanation of symbols]

[0073] 26A Gusset Plate 26B gusset plate 30 Lattice beam (lattice structural material) 40 Upper chord material (chord material) 50 Lower chord (chord) 60 Lattice 70 Reinforcement member 72 Split reinforcement member 80 Spelling board

Claims

1. A pair of chords facing each other; A plurality of lattice members are installed diagonally between the pair of chord members; a pair of gusset plates respectively provided at both ends in the longitudinal direction of the pair of chord members; a pair of reinforcing members arranged on both sides of the plurality of lattice members along the longitudinal direction of the chord members, and whose longitudinal ends are bolted together with a pair of the gusset plates sandwiched therebetween; A reinforced structure of lattice structural material.

2. A pair of the reinforcing members are structurally separated from the plurality of lattice members. A reinforced structure for a lattice structural material according to claim 1.

3. The reinforcing member has a plurality of divided reinforcing members divided in the longitudinal direction, The divided reinforcing members adjacent to each other in the longitudinal direction of the reinforcing member are joined by bolts via a connecting plate. A reinforcing structure for a lattice structural material according to claim 1 or 2.

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