JP6305057B2 - Diagonal reinforcement and reinforcement method - Google Patents

Description

  The present invention relates to a reinforcing tool and a reinforcing method used to reinforce a buckling of a brace material installed in a building or structure, which is an existing workpiece, or a diagonal material such as a truss material of a steel tower.

  Conventionally, a reinforcing tool attached to the diagonal member has been proposed for reinforcing the buckling of the diagonal member that receives a relatively large compressive force during an earthquake. The reinforcing tool according to the proposal includes a square steel pipe surrounding the diagonal member except for both ends of the diagonal member, and a plurality of screws provided in the steel pipe at intervals in the longitudinal direction and extending in a transverse direction of the steel pipe. A hole and a plurality of bolts that are screwed into the screw hole and extend to the front of the diagonal member toward the diagonal member (see Patent Document 1 below).

  According to this reinforcing tool, when the diagonal member is deflected to a predetermined size due to the seismic force, the diagonal member is prevented from being excessively bent by hitting the end surface of the bolt. As a result, buckling of the diagonal material is prevented.

JP 2002-180535 A

  By the way, the above-mentioned conventional reinforcing tool needs to support a steel pipe for attachment to an oblique member due to its structure, and also requires a supporting means and installation work for this purpose.

  An object of the present invention is to provide a reinforcing tool and a reinforcing method that can be attached to a diagonal member without using a supporting means.

The diagonal reinforcing member according to the present invention includes a steel pipe that surrounds the diagonal material except for both ends of the diagonal material, and the steel pipe is provided at intervals in the longitudinal direction and extends in the transverse direction of the steel pipe. A plurality of screw holes and a plurality of bolts screwed into the screw holes,
Each of the steel pipe and the plurality of bolts has an inner peripheral surface and an end surface that are in contact with the diagonal member and restrain the diagonal member in the transverse direction thereof.

  According to the present invention, when the reinforcing tool is attached to the diagonal member, the inner peripheral surface of the steel pipe surrounding the diagonal member and the end surface of the bolt are in contact with the diagonal member, whereby the diagonal member is crossed in the transverse direction of the steel pipe. Restraint with respect to. At the same time, the reinforcing tool is supported by the diagonal member. For this reason, the conventional support means and its installation work are not required for the attachment of the reinforcing tool to the diagonal member. The diagonal member that is restrained by the steel pipe and the bolt is limited in the amount of bending that occurs when an external force acts or during an earthquake, and buckling of the diagonal member is prevented.

  The steel pipe may be composed of two halves having a semicircular cross-sectional shape. According to this, the operation | work which attaches the diagonal material so that the one part may be surrounded can be performed more easily. The two halves can be integrated, for example, by welding or via a flange joint.

The reinforcing method according to the present invention is performed using the reinforcing tool . In this reinforcing method, the diagonal member attached to the workpiece is temporarily removed from the workpiece, and the periphery of the diagonal member is wrapped with a steel pipe except for both ends of the diagonal member removed from the workpiece. A plurality of bolts respectively screwed into a plurality of screw holes provided in the steel pipe at intervals in the longitudinal direction and extending in the transverse direction of the steel pipe, whereby the inner peripheral surface of the steel pipe and the bolt An end face abutting against the diagonal member, constraining the diagonal member with respect to a transverse direction thereof, and then attaching the diagonal member placed in a constrained state to the workpiece.

  According to this reinforcing method, when the diagonal member is placed in the restrained state, the reinforcing tool, that is, the steel pipe and the bolt are fixed to the diagonal member. Therefore, when the diagonal member is attached to the original workpiece, the reinforcing member is supported by the diagonal member, while the diagonal member is reinforced by the reinforcing member in this state.

  Moreover, the other reinforcement method which concerns on this invention is performed using the steel pipe which consists of two halves. This reinforcing method is to wrap around the diagonal member with a steel pipe formed by abutting two half members against each other, excluding both ends of the diagonal member attached to the workpiece, and then joining the two half members together. A plurality of bolts respectively screwed into a plurality of screw holes provided at intervals in the longitudinal direction of the steel pipe and extending in the transverse direction of the steel pipe are screwed, whereby an inner peripheral surface of the steel pipe and an end face of the bolt In contact with the diagonal member, and restraining the diagonal member with respect to the transverse direction thereof.

  According to this reinforcing method, the diagonal member can be reinforced while being attached to the workpiece without removing the diagonal member from the workpiece. When the diagonal member is placed in the restrained state, the reinforcing member, that is, the steel pipe and the bolt are fixed to the diagonal member. For this reason, the reinforcing member is supported by the diagonal member, and on the other hand, the diagonal member is reinforced by the reinforcing member in this state.

  The diagonal material to which the present invention is applied is made of, for example, equilateral mountain steel.

It is a front view of the reinforcement tool concerning an example of the present invention. FIG. 2 is a cross-sectional view taken along line 2-2 of FIG. It is a fragmentary perspective view of the reinforcement tool which concerns on the other example of this invention. It is a cross-sectional view of the reinforcing tool applied to the diagonal material of another shape.

  Referring to FIG. 1, a reinforcer according to an example of the present invention is indicated generally by the numeral 10.

  The reinforcing tool 10 is a brace material that is installed in an existing workpiece, for example, a building or a structure (not shown) and prevents deformation of the building or structure, or a truss material for a steel tower (not shown). The diagonal member 12 is attached to this as an object of reinforcement, and the buckling strength of the diagonal member 12 is substantially increased by the reinforcement.

  The diagonal member 12 is made of a shape steel made of equilateral angle steel (FIG. 2), groove steel (FIG. 3) or the like, a steel pipe (not shown), etc., and is attached to the workpiece via both end portions 20 thereof. It has been. As shown in FIG. 1, the diagonal member 12 is temporarily detached from the workpiece for attachment of the reinforcing tool 10, and then the reinforcing tool 10 is attached. The diagonal member 12 to which the reinforcing tool 10 is attached is returned to the original position in the workpiece and attached to the workpiece.

  The reinforcing tool 10 includes a steel pipe 14, a plurality of screw holes 16 (see FIGS. 2 and 3) provided in the steel pipe and extending in a transverse direction of the steel pipe 14, and bolts 18 screwed into the screw holes 16. .

  The illustrated steel pipe 14 is a circular steel pipe having a circular cross-sectional shape, and surrounds the periphery of the diagonal member 12 except for both end portions 20 of the diagonal member 12. The steel pipe 14 may be composed of two halves (not shown) having a semicircular cross-sectional shape instead of the illustrated example. The two halves are provided with a flange joint (not shown) in order to make them butt in the radial direction to form a cylindrical body. Alternatively, the two halves are joined together by welding to form a cylindrical body. When the steel pipe 14 is composed of the two halves, the reinforcing member 10 is attached to the diagonal member 12 without removing the diagonal member 12 from the workpiece while being attached to the workpiece. be able to. In addition, the steel pipe 14 can have a rectangular cross-sectional shape other than the circular shape, for example. Also for the steel pipe having a non-circular cross-sectional shape, this may consist of two halves.

  The plurality of screw holes 16 are arranged at intervals (preferably at equal intervals) in the longitudinal direction of the steel pipe 14. In the example shown in the drawing, the plurality of screw holes 16 are provided so that the reinforcing tool 10 can be applied to the diagonal member 12 made of equilateral angle steel (FIGS. 1 and 2) or groove steel (FIG. 3). Are arranged in a row at intervals of 90 degrees in the circumferential direction of the steel pipe 14. For example, in the application to the diagonal member 12 made of equilateral angle steel (FIG. 1), two adjacent screw holes 16 of the four screw holes 16 are used, and each of these screw holes 16 is used. Bolts 18 are screwed together. Further, three rows of screw holes 16 among the four rows of screw holes 16 are used for application to the diagonal member 12 made of channel steel (FIG. 3), and bolts 18 are respectively inserted into these screw holes 16. Are screwed together. The arrangement positions of the plurality of screw holes 16 in the steel pipe 14 can be determined according to the shape of the diagonal member 12. Further, as is apparent from the above, the steel pipe 14 has a size (in the illustrated example, an inner diameter) that can surround the diagonal member 12.

  Referring to FIG. 2, the steel pipe 14 has an inner peripheral surface 22 formed of a cylindrical surface. The inner peripheral surface 22 of the steel pipe 14 is in contact with the diagonal member 12 made of equilateral angle steel at two tips 24 of the diagonal member. On the other hand, each bolt 18 has an end face 26. The end face 26 of the bolt 18 is in contact with the diagonal 12 at its two outer faces 28. Accordingly, the diagonal member 12 is constrained in the transverse direction of the steel pipe 14 by the inner peripheral surface 22 of the steel pipe 14 and the end faces 26 of the plurality of bolts 18 inside the steel pipe 14. In addition, due to this restraint, the reinforcing member 10 including the steel pipe 14 and the bolt 18 is supported by the diagonal member 12. For this reason, the special support means about the reinforcement tool 18 like before is not required.

  Referring to FIG. 3, the inner peripheral surface 22 of the steel pipe 14 is in contact with the diagonal member 12 made of channel steel at both ends 30 of the diagonal member. Furthermore, the end surfaces 26 of the plurality of bolts 18 are in contact with the diagonal member 12 at the three outer surfaces 32 thereof. Accordingly, the diagonal member 12 is constrained in the transverse direction of the steel pipe 14 by the inner peripheral surface 22 of the steel pipe 14 and the end faces 26 of the plurality of bolts 18 inside the steel pipe 14. Further, by this constraint, the reinforcing tool 10 including the steel pipe 14 and the bolt 18 is fixed to the diagonal member 12 and supported by the diagonal member.

  In addition, the arrangement | positioning position, quantity, etc. of the volt | bolt 18 can be set according to the contact aspect of the diagonal 12 and the steel pipe 14. FIG. For example, as shown in FIG. 3, when the inner peripheral surface 22 of the steel pipe 14 is in contact with both end faces 30 of the diagonal member 12 and, in addition to this, an intersection 33 of two adjacent outer side surfaces 32 of the diagonal member 12. Can eliminate the bolt 18 located above.

  The place where the end face 26 of the bolt 18 is in contact with the diagonal member 12 may be a place other than the outer face 28 shown in FIG. For example, it can be the intersection 34 of both outer side surfaces 28 of the diagonal member 12. In this example, the steel pipe 14 is arranged with respect to the diagonal member 12 so that one row of the screw holes 16 in the four rows of screw holes 16 faces the intersection 34 of the diagonal member 12.

  The magnitude of the contact pressure of the inner peripheral surface 22 of the steel pipe 14 with respect to the diagonal member 12 can be adjusted by the screwing amount of each bolt 18 in each screw hole 16. Further, when reinforcing a diagonal member having another shape, size, etc., using a steel pipe 14 having a plurality of screw holes 16 arranged as shown in the figure, by adjusting the screwing amount of the bolt 18 The diagonal member can be pressed against the inner peripheral surface 22 of the steel pipe 14 and restrained in the steel pipe 14.

  Next, a reinforcing tool 40 according to another example of the present invention will be described with reference to FIG.

  This reinforcing tool 40 is applied to the diagonal member 12 made of equilateral angle steel, like the reinforcing tool 10 shown in FIG. The reinforcing tool 40 has a steel pipe 44, and the illustrated steel pipe 44 is formed of a cylindrical body. Unlike the steel pipe 14 of the reinforcing tool 10, the steel pipe 44 does not have the screw hole 16 and the bolt 18. Further, the steel pipe 44 has a smaller inner diameter than the steel pipe 14.

  The steel pipe 44 has an inner peripheral surface 46 that is in contact with both ends 24 of the diagonal member 12 and the intersection 34 of both outer side surfaces 28. According to this, the diagonal member 12 is restrained with respect to the transverse direction of the steel pipe 44 by the inner peripheral surface 46 of the steel pipe 14.

  The steel pipe 44 may have a cross-sectional shape other than a circle such as a rectangle, like the steel pipe 14. Moreover, it can consist of two halves as described above.

By constraining the diagonal member 12 with respect to the transverse direction of the steel pipes 14 and 44, the diagonal member 12 is limited in the amount of bending caused by the compressive force received during an earthquake and the buckling of the diagonal member 12 is prevented .

DESCRIPTION OF SYMBOLS 10 Reinforcement tool 12 Diagonal material 14 Steel pipe 16 Screw hole 18 Bolt 20 Both ends 22 of diagonal material Inner peripheral surface 26 of steel pipe End surface 44 of bolt 44 Steel pipe 46 Inner peripheral surface of steel pipe

Claims (5)

Diagonal reinforcement,
A steel pipe surrounding the diagonal material except for both ends of the diagonal material;
A plurality of screw holes provided in the steel pipe at intervals in the longitudinal direction and extending in a transverse direction of the steel pipe, and a plurality of bolts screwed into the screw holes;
The steel pipe and the plurality of bolts each have a diagonal reinforcing member having an inner peripheral surface and an end surface that are in contact with the diagonal and constrain the diagonal in the transverse direction. The diagonal reinforcing member according to claim 1 , wherein the steel pipe is composed of two halves having a semicircular cross-sectional shape. The reinforcing tool according to claim 1 or 2 , wherein the diagonal member is made of equilateral angle steel. Temporarily removing the diagonal attached to the workpiece from the workpiece;
Surrounding the diagonal with a steel pipe except for both ends of the diagonal removed from the workpiece;
A plurality of bolts respectively screwed into a plurality of screw holes provided at intervals in the longitudinal direction of the steel pipe and extending in the transverse direction of the steel pipe are screwed, whereby an inner peripheral surface of the steel pipe and an end face of the bolt Abutting the diagonal member and restraining the diagonal member with respect to its transverse direction,
Thereafter, the diagonal member is reinforced by attaching the diagonal member placed in a restrained state to the workpiece. Encircling the periphery of the diagonal member with a steel pipe formed by abutting two halves together, excluding both ends of the diagonal member attached to the workpiece;
Joining the halves together,
A plurality of bolts respectively screwed into a plurality of screw holes provided at intervals in the longitudinal direction of the steel pipe and extending in the transverse direction of the steel pipe are screwed, whereby an inner peripheral surface of the steel pipe and an end face of the bolt A method of reinforcing a diagonal member, comprising contacting the diagonal member with respect to a transverse direction thereof.

Images