JP6340181B2 - Reinforcing structure for steel perforated members - Google Patents

Description

  The present invention relates to a reinforcing structure for a steel perforated member.

  As a reinforcement structure of a steel perforated beam with a through hole formed in the web part, a structure in which reinforcing plates are respectively arranged above and below the through hole and the upper and lower ends of each reinforcing plate are joined to the web part is known. (For example, see Patent Documents 1 and 2).

JP 2013-01495 A JP 2013-014957 A

  By the way, for example, when the through hole formed in the web portion of the steel member becomes large, the installation space for the reinforcing plate between the through hole and the flange portion becomes narrow, and the end portion of the reinforcing plate comes close to the flange portion. In this case, there is a possibility that the flange portion becomes an obstacle and it becomes difficult to join the end portion of the reinforcing plate to the web portion.

  In consideration of the above-described facts, an object of the present invention is to improve the workability of joining a reinforcing plate to a steel member.

The reinforcing structure of the steel perforated member according to the first aspect includes a steel member having a web portion in which a through hole is formed, and a flange portion provided at an end portion of the web portion, and more than the through hole. A reinforcing plate disposed on the flange portion side across the web portion and the flange portion and joined to the web portion and the flange portion, respectively.

According to the reinforcing structure for a steel perforated member according to the first aspect , the reinforcing plate is disposed across the web portion and the flange portion on the flange portion side of the through hole, and is joined to the web portion and the flange portion, respectively. . Therefore, unlike the prior art for joining the upper and lower end portions of the reinforcing plate to the web portion (for example, see Patent Documents 1 and 2), the flange portion does not become an obstacle, so the reinforcing plate can be easily joined to the steel member. Can do.

A reinforcing structure for a steel perforated member according to a second aspect is the reinforcing structure for a steel perforated member according to the first aspect , wherein the reinforcing plate is disposed with the longitudinal direction as the material axis direction of the steel member, and Both end portions along the direction are welded to the web portion and the flange portion, respectively.

According to the reinforcing structure of the steel perforated member according to the second aspect , both ends along the longitudinal direction of the reinforcing plate are welded to the web portion and the flange portion, respectively, thereby reinforcing the shear force acting on the web portion. The plate can be resisted in all sections. Therefore, the shear reinforcement effect with respect to a web part improves.

A reinforcing structure for a steel perforated member according to a third aspect is the reinforcing structure for a steel perforated member according to the second aspect , wherein the reinforcing plate is inclined with respect to the web portion, the both end portions, the web portion, It is an inclined plate which forms the groove for welding between at least one of the said flange parts.

According to the reinforcing structure of the steel perforated member according to the third aspect , by tilting the inclined plate with respect to the web portion, the end portion and the web portion or the flange portion are processed without processing the end portion of the inclined plate. A welding groove can be formed between the two. Therefore, the welding strength can be increased while reducing the processing cost of the inclined plate.

  Further, a closed section is formed by the web portion, the flange portion, and the inclined plate. Therefore, the bending strength of the flange part near the reinforcement part by the inclined plate is improved.

The reinforcing structure for a steel perforated member according to a fourth aspect is the reinforcing structure for a steel perforated member according to the second aspect, in which the end surface of the both end portions abuts against the web portion and the flange portion, respectively. L-shaped plate.

According to the reinforcing structure for a steel perforated member according to the fourth aspect , the L-shaped plate is arranged in a state in which the end surfaces of both end portions thereof are abutted against the web portion and the flange portion, respectively. Thereby, for example, both end portions of the L-shaped plate can be easily joined to the web portion and the flange portion by fillet welding or the like.

  Further, a closed section is formed by the web portion, the flange portion, and the L-shaped plate. Therefore, the bending strength of the flange part near the reinforcement part by the L-shaped plate is improved.

  As described above, according to the reinforcing structure for a steel perforated member according to the present invention, it is possible to improve the workability of joining the reinforcing plate to the steel member.

It is a side view (elevated view) showing a steel beam to which a reinforcing structure for a steel perforated member according to an embodiment of the present invention is applied. It is sectional drawing cut | disconnected along 2-2 line | wire of FIG. It is a partially expanded sectional view of FIG. It is a partially expanded sectional view corresponding to FIG. 3 which shows the reinforcement plate which concerns on a comparative example. It is a partially expanded sectional view corresponding to FIG. 3 which shows the modification of the reinforcement plate in one Embodiment of this invention. It is a partially expanded sectional view corresponding to FIG. 3 which shows the modification of the reinforcement plate in one Embodiment of this invention.

  Hereinafter, a reinforcing structure for a steel perforated member according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 shows a steel beam 12 to which a reinforcing structure 10 for a steel perforated member according to this embodiment is applied. The steel beam 12 is constructed between the column 14 and another column (not shown). The column 14 is formed of a steel member such as a square steel pipe, a circular steel pipe, or an H-shaped steel, but may be formed of RC, CFT, or the like.

  The steel beam 12 is formed of H-shaped steel and has a web portion 12A and a pair of flange portions 12B and 12C provided at upper and lower ends of the web portion 12A. The pair of flange portions 12B and 12C face each other in the vertical direction and are connected to each other via the web portion 12A. The web portion 12A and the flange portions 12B and 12C are substantially orthogonal to each other.

  A circular through hole 16 is formed in the web portion 12A. This through hole 16 is, for example, a facility hole in which facility piping and facility wiring are laid, and is formed at the end of the steel beam 12 in the material axis direction (arrow X direction). The through hole 16 is not limited to a circular shape, and may be an elliptical shape or a polygonal shape. Further, the through hole 16 may be formed in an intermediate portion of the steel beam 12 in the material axis direction. Furthermore, the through hole 16 may be eccentric in the vertical direction.

  A pair of inclined plates 20 are arranged above and below the through hole 16. In addition, since a pair of inclination plate 20 is the same structure, hereafter, the inclination plate 20 arrange | positioned under the through-hole 16 is demonstrated.

  The inclined plate 20 as an example of the reinforcing plate is formed of a flat bar (flat steel plate) whose cross-sectional area is substantially constant over the entire length, and the longitudinal direction is the material axis direction of the steel beam 12 (hereinafter referred to as “beam”). (Also referred to as “material axis direction”). Further, both end portions 20 </ b> A in the longitudinal direction of the inclined plate 20 extend to both sides in the beam material axial direction from the through holes 16.

  As shown in FIG. 2, the inclined plates 20 are provided on both sides of the web portion 12 </ b> A in the thickness direction. The lower inclined plate 20 is disposed over the web portion 12A and the flange portion 12C on the flange portion 12C side with respect to the through hole 16. In other words, as shown in FIG. 3, the inclined plate 20 straddles the web portion 12A and the flange portion 12C across the corner portion 18 between the web portion 12A and the flange portion 12C.

  The inclined plate 20 is disposed in an inclined state with respect to the web portion 12A, and upper and lower end portions 20U and 20L along the longitudinal direction of the inclined plate 20 are welded to the web portion 12A and the flange portion 12C, respectively. .

  More specifically, a welding groove 22 is formed between the end surface of the upper end portion (one end portion) 20U along the longitudinal direction of the inclined plate 20 and the web portion 12A. Similarly, a groove 24 for welding is formed between the end face of the lower end portion (other end portion) 20L along the longitudinal direction of the inclined plate 20 and the flange portion 12C. Using these grooves 22 and 24, the upper end 20U and the lower end 20L of the inclined plate 20 are continuously or intermittently welded to the web portion 12A and the flange portion 12C.

  The inclination angle θ of the inclined plate 20 with respect to the web portion 12A is preferably around 45 degrees from the viewpoint of forming the grooves 22 and 24. On the other hand, from the viewpoint of reinforcing the web portion 12A, the inclination angle θ is desirably 45 degrees or less.

  Next, the effect | action of the reinforcement structure of the steel perforated member which concerns on this embodiment is demonstrated.

  First, in order to clarify the operation of the present embodiment, the reinforcing plate 100 according to the comparative example will be described. As shown in FIG. 4, the reinforcing plate 100 according to the comparative example has its upper end portion 100U and lower end portion 100L welded to the web portion 12A in a state where the reinforcing plate 100 is superimposed on the web portion 12A.

  Here, when the through hole 16 formed in the web portion 12A is enlarged, the installation space of the reinforcing plate 100 between the through hole 16 and the flange portion 12C is narrowed, and the lower end portion 100L of the reinforcing plate 100 is connected to the flange portion 12C. Proximity. In this case, for example, when the lower end portion 100L of the reinforcing plate 100 is welded to the web portion 12A by the welding torch (welding gun) 102, the flange portion 12C becomes an obstacle, and the welding torch 102 becomes the lower end portion 100L of the reinforcing plate 100. It is difficult to abut, and it takes time and effort to weld.

  On the other hand, in this embodiment, as shown in FIG. 3, the inclined plate 20 is disposed across the web portion 12 </ b> A and the flange portion 12 </ b> C on the flange portion 12 </ b> C side with respect to the through hole 16. While the portion 20U is welded to the web portion 12A, the lower end portion 20L is welded to the flange portion 12C. Therefore, unlike the reinforcing plate 100 according to the comparative example described above, the flange portion 12C does not become an obstacle to the welding torch 102 (see FIG. 4). Therefore, the inclined plate 20 can be easily joined to the steel beam 12.

  Further, by joining the inclined plate 20 to the web portion 12A and the flange portion 12C, the inclined plate 20 can resist the shearing force acting on the web portion 12A during an earthquake. Therefore, the same reinforcing effect as that of the reinforcing plate 100 according to the comparative example can be obtained.

  As described above, according to the steel perforated member reinforcing structure 10 according to the present embodiment, the workability of joining the inclined plate 20 to the steel beam 12 is improved while reinforcing the web portion 12A having a cross-sectional defect by the through hole 16. Can be improved. In addition, although description is abbreviate | omitted, the same effect can be acquired also about the inclination plate 20 arrange | positioned above the through-hole 16. FIG.

  In addition, by welding the inclined plate 20 to the web portion 12A and the flange portion 12C along the upper end portion 20U and the lower end portion 20L, the inclined plate 20 resists the shearing force acting on the web portion 12A in the entire cross section. It becomes possible. Therefore, the shear reinforcement effect with respect to 12 A of web parts improves.

  Furthermore, by inclining the inclined plate 20 with respect to the web portion 12A, the upper end portion 20U and the lower end portion 20L of the inclined plate are not processed, and the lower end portion 20L and the flange are formed between the upper end portion 20U and the web portion 12A. Grooves 22 and 24 for welding can be formed between the portions 12C. Therefore, the welding strength can be increased while reducing the processing cost of the inclined plate 20.

  Moreover, in the present embodiment, a closed section is formed by the web portion 12A, the flange portion 12C, and the inclined plate 20. Accordingly, the bending strength of the flange portion 12C (or the entire beam section) near the reinforcing portion by the inclined plate 20 is improved.

  In addition, in this embodiment, although the groove | channels 22 and 24 for welding were each formed between the upper end part 20U and the lower end part 20L of the inclination plate 20, and the web part 12A and the flange part 12C, this was shown. Not exclusively. For example, at least one of the upper end portion 20U and the lower end portion 20L of the inclined plate 20 may be cut obliquely, and the end surface may be abutted against the web portion 12A or the flange portion 12C and joined by fillet welding or the like.

  Next, a modification of the above embodiment will be described.

  In the said embodiment, although the example which reinforced the steel beam 12 with the inclination plate 20 was shown, it does not restrict to this. As the reinforcing plate, for example, an L-shaped plate 30 may be used as shown in FIG. Specifically, the L-shaped plate 30 is formed of a steel plate having an L-shaped cross section, and is disposed so as to cover the web portion 12A and the flange portion 12C. The end surfaces of both end portions 30U and 30L along the longitudinal direction of the L-shaped plate 30 are respectively abutted against the web portion 12A and the flange portion 12C, and welded to the web portion 12A and the flange portion 12C, respectively, by fillet welding or the like. Has been.

By joining the L-shaped plate 30 to the web portion 12A and the flange portion 12C in this way, the web portion 12A and the flange portion 12C are more integrated as compared with the above-described embodiment. The bending strength of the flange portion 12C (or the entire beam section) in the vicinity of the reinforcing portion due to is improved.
Therefore, the number of L-shaped plates 30 installed can be reduced.

  Further, as shown in FIG. 6, a curved plate 40 may be used as the reinforcing plate. The curved plate 40 is formed, for example, by dividing a cylindrical pipe (round steel pipe) into four parts, and is formed in a cross-sectional arc shape. End surfaces of both end portions 40U and 40L along the longitudinal direction of the curved plate 40 are respectively abutted against the web portion 12A and the flange portion 12C, and are welded to the web portion 12A and the flange portion 12C, respectively, by fillet welding or the like. ing. Even with such a curved plate 40, the same effect as in the above embodiment can be obtained.

  Moreover, although the example which welded the inclination plate 20 to the web part 12A and the flange part 12C was shown in the said embodiment, it does not restrict to this. For example, the inclined plate 20 may be bonded to the web portion 12A and the flange portion 12C with an epoxy resin adhesive or the like.

  Moreover, in the said embodiment, although the example which provided the inclination plate 20 in the both sides of the up-down direction of the through-hole 16 was shown, it does not restrict to this. The inclined plate 20 can be provided on at least one side of the through hole 16 in the vertical direction.

  Moreover, although the example which provided the inclination plate 20 in the both sides of the thickness direction of 12 A of web parts was shown in the said embodiment, it does not restrict to this. The inclined plate 20 can be provided on at least one side in the thickness direction of the web portion 12A.

  Moreover, in the said embodiment, although the example which reinforced the through-hole 16 formed in the edge part of the steel beam 12 with the inclination plate 20 was shown, it is not restricted to this. For example, the through hole formed in the intermediate portion of the steel beam 12 in the material axis direction may be reinforced by the inclined plate 20 or the like. Moreover, you may reinforce the through-hole formed in the web part of the bracket in a bracket construction method with the inclination plate 20 grade | etc.,.

  Furthermore, in the said embodiment, although the example which formed the steel beam 12 with the H-section steel was shown, it is not restricted to this. The steel beam only needs to have a web portion and at least one flange portion provided at the end of the web portion. For example, the steel beam is an I-shaped steel, a C-shaped steel, a T-shaped steel, an L-shaped steel, It may be formed. Further, the steel beam may be formed of a double web shape steel in which upper and lower flange portions are connected by two web portions facing each other, a box shape steel having a cross-sectional box shape, or the like.

  Furthermore, the steel perforated member reinforcing structure 10 according to the above embodiment is not limited to the steel beam 12 but can be applied to a steel column as a steel member. In this case, for example, FIG. 2 may be regarded as a cross section of a steel column. In the steel column, the material axis direction is the vertical direction.

  As mentioned above, although one embodiment of the present invention was described, the present invention is not limited to such an embodiment, and one embodiment and various modifications may be used in combination as appropriate, and the gist of the present invention will be described. Of course, various embodiments can be implemented without departing from the scope.

DESCRIPTION OF SYMBOLS 10 Steel perforated member reinforcement structure 12 Steel beam 12A Web part 12B Flange part 12C Flange part 16 Through-hole 20 Inclined plate (reinforcement plate)
20U upper end (end along the longitudinal direction)
20L lower end (end along the longitudinal direction)
22 Groove 24 Groove 30 L-shaped plate (reinforcement plate)
30U end (end along the longitudinal direction)
30L end (end along the longitudinal direction)
40 Curved plate (reinforcement plate)
40U end (end along the longitudinal direction)
40L end (end along the longitudinal direction)

Claims (4)

A steel member having a web part in which a through hole is formed avoiding the joint part, and a flange part provided at an end of the web part,
A reinforcing plate that is disposed across the web portion and the flange portion on the flange portion side of the through-hole, and is joined to the web portion and the flange portion by welding or an adhesive, respectively;
A steel perforated member reinforcement structure comprising: The reinforcing plate is disposed with the longitudinal direction as the material axis direction of the steel member, and both end portions along the longitudinal direction are welded to the web portion and the flange portion, respectively.
The reinforcing structure for a steel perforated member according to claim 1. The reinforcing plate is an inclined plate that is inclined with respect to the web portion and forms a welding groove between the both end portions and at least one of the web portion and the flange portion.
The reinforcing structure for a steel perforated member according to claim 2. The reinforcing plate is an L-shaped plate in which end surfaces of the both ends are abutted against the web portion and the flange portion, respectively.
The reinforcing structure for a steel perforated member according to claim 2.

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