JP6875155B2 - How to make a buckling restraint brace - Google Patents

Description

The present invention relates to a method for manufacturing a buckling restraint brace used for seismic resistance, vibration damping brace, flint material, civil engineering structure such as a bridge or an iron bridge.

Conventionally, as shown in FIGS. 4 to 5, the buckling restraint brace 11 is a restraint filler (for example, mortar) in which a steel material serving as a core material 12 is filled in the restraint frame member 13 and the recesses of the restraint frame member 13. It is sandwiched between the restraint members 20a and 20b formed by 14, and the end portion of the restraint frame member 13 in the lateral direction is fixed by the fillet welded portion a to be integrated.

Explaining the method of forming the buckling restraint brace 11, as shown in FIG. 4, the unbonded materials 17 and 18 for edge cutting are attached to the core material 12. Both ends of the core material 12 in the longitudinal direction are formed in a rib plate 19 provided with bolt holes for connection.

The closing member 16 is welded and fixed to both ends of the restraint frame member 13 in the longitudinal direction. A mortar, which is a restraint filler 14, is cast and filled in the recess of the restraint frame member 13. Space adjustment spacers 15 are arranged on both side surfaces of the core material 12, and they are placed on the steel restraint mortar 20b, and the other restraint material 20a is covered so as to be staggered. As shown in FIG. 5, the end portion of the restraint frame member 13 in the lateral direction is fillet welded by a welding means, and the restraint member 20a, which is composed of the core material 12, the restraint frame member 13, and the mortar at the fillet welded portion a, The buckling restraint brace 11 is formed by integrating with 20b.

As such a buckling restraint brace 11, the one described in Patent Document 1 is known.

Japanese Unexamined Patent Publication No. 2003-293461

However, in the conventional buckling restraint brace, it is difficult to add the effect of the filler in the calculation of the stiffening force for suppressing the buckling of the core material 12.

Further, in the case of the above-mentioned buckling restraint brace of the pre-casting type, the construction accuracy of the non-landing of the filler (mortar) surface affects the brace performance. Furthermore, if the buckling restraint brace is a filling type, in which the core material is passed through a tubular restraining member and the mortar is filled from the end in the longitudinal direction, the filling status of the filling material inside cannot be grasped. In this case, it is necessary to erect the material shaft and place the filler, which requires a large facility in the vertical direction, and there is a problem that it is difficult to correct the warp of the core material. The buckling restraint brace and the method for manufacturing the buckling restraint brace according to the present invention have been proposed to solve such a problem.

The gist for solving the above-mentioned problems of the method for manufacturing a buckling restraint brace according to the present invention and achieving the object is to have joints for joining at both ends in the longitudinal direction and to surround the parts other than the joints with an unbonded material. A core material, a restraining material that also serves as a mold and has a cross-sectional shape that is orthogonal to the longitudinal direction and has an upper U-shaped recess that is large enough to include the core material other than the joint portion, and the restraining material. A restraint lid material for closing the opening of the recess is prepared, and then the core material is positioned and installed at a desired position inside the recess of the restraint material laid on the floor surface with a spacer, and the restraint is provided. A filler is placed inside the recess of the material, the finished surface of the filler is finished, and after the required strength of the placed filler is developed, the restraining material is covered with the restraining lid material. The restraining lid material and the restraining material are integrally fixed by a fixing means.

The core material is installed in a state where the material shaft is laid down along the floor surface and its weak shaft is parallel to the vertical direction.

According to the buckling restraint brace of the present invention and the manufacturing method thereof, it takes time and effort to adjust the non-landing of the restraint concrete in the conventional pre-casting type, and it takes time and effort to weld the fitting. Then neither is necessary. Further, in the conventional post-casting type, a large facility in the height direction is required when manufacturing a long product, but in the present invention, it can be laid on its side for manufacturing.

Further, since the clearance between the filler and the core material is only the unbonded material, the buckling binding force is improved. Since the filler is filled in the concave restraint material laid on the floor, the filling status of the filler can be confirmed. Since the restraining material is made of steel, it can also be used as a formwork, and it can also be used for supplementary steel performance to improve efficiency. Since the filler is concrete or mortar and is a popular material, it has an excellent effect of reducing the manufacturing cost.

It is sectional drawing (A), (B) explaining the manufacturing method of the buckling restraint brace 1 which concerns on this invention, and sectional drawing (C) which concerns on other Examples. It is explanatory cross-sectional view which shows the strong axis (x) and weak axis (y) of a core material 2. It is a perspective view before concrete placing which explains the manufacturing method of the buckling restraint brace 1 of this invention. It is a perspective view of the buckling restraint brace 1 which concerns on this invention. It is an exploded perspective view which shows the structure of the buckling restraint brace 11 which concerns on a conventional example. It is sectional drawing of the buckling restraint brace 11.

As shown in FIG. 1-A, the buckling restraint brace 1 and the manufacturing method thereof according to the present invention are manufactured by laying a concave restraining material on the floor and arranging a core material so as to reduce air accumulation. It is a thing.

As shown in FIGS. 1-A to 3, the buckling restraint brace 1 according to the present invention has joints 3 and 3 for connection at both ends in the longitudinal direction, and the joints other than the joint 3 are surrounded by an unbonded material 4. There is a core material 2 that has been formed.

Further, a restraining material that also serves as a formwork and has a size that includes the entire core material 2 except for the joint portion 3 and has a cross-sectional shape in the lateral direction orthogonal to the longitudinal direction formed in an upper U-shaped recess. 5, the restraint lid member 6 fixed to the restraint member 5 in order to close the opening of the restraint member 5, and concrete (or mortar) as a filler cast in the recessed space of the restraint member 5. The buckling restraint brace 1 is composed of 7.

The core material 2 is, for example, a steel member having a rectangular cross section, has a joint portion 3 at an end portion in the longitudinal direction thereof, and has a plurality of through holes 3a. Further, the core material 2 is unbonded over the entire circumference of the core material 2 excluding the joint portion 3 in order to avoid direct contact with the filler and block the core material 2 so as not to be affected by the axial force. It is surrounded by material 4.

The unbonded material 4 is, for example, a sheet material such as butyl rubber. This butyl rubber is a synthetic rubber having excellent ozone resistance, aging resistance, electrical insulation, and shock absorption.

When the core material 2 is installed on the restraint material 5, as shown in FIGS. 1-A and 1-B, the weak axis (y) is oriented in a direction orthogonal to the bottom surface of the restraint material 5. , Installed via the spacer 8. One side of the spacer-8 is fixed to the restraining material 5 by a fixing means such as an adhesive. The spacer 8 is, for example, a scrap of steel, a mortar piece, a block of concrete, or the like.

When the restraint member 5 is installed on the floor surface, the weak axis (y) becomes parallel along the vertical direction (vertical direction). The reason for arranging the core material 2 in this way is to prevent the formation of air pools on the lower side of the core material 2 on the concrete placing surface as the filler, and to place the concrete densely.

As shown in FIGS. 1-A (A) and 1-A (B), the restraint member 5 is a concave shape formed in an upper U-shaped cross-sectional shape and is also used as a steel formwork. As shown in FIGS. 1-A (C), the restraining material 5 can be integrally molded into a concave shape by bending.

A closing material 5a is provided at the end of the restraining material 5 in the longitudinal direction for placing a filler (concrete, mortar). The closing material 5a may be an integral body obtained by cutting out a part of the restraining material 5, or a separate constituent member of a different material may be fixed to the restraining material 5 by welding means, fixing means, or the like.

Further, the restraint lid material 6 is, for example, a steel lid material that covers the entire surface of the upper opening of the restraint member 5. The restraint lid member 6 is fixed by means such as welding in order to integrate with the restraint member 5. As an example, as shown in FIGS. 1-A (B), the restraint lid 6 is formed in a U-shaped cross section in the lateral direction, and the side wall 6a thereof is fillet welded to the side wall of the restraint 5. Is also good. Not limited to this embodiment, as shown in FIGS. 1-A (C), a flat plate-shaped restraint lid 6 may be formed and the restraint lid 5 may be closed by a fixing means such as welding. Good.

A method for manufacturing the buckling restraint brace 1 according to the present invention configured as described above will be described.
First, a core material 2 having joints for joining at both ends in the longitudinal direction and surrounded by an unbonded material other than the joints, and a core material 2 having a size other than the joints are included in the longitudinal direction. The restraining material 5 that also serves as a formwork is formed in a concave portion having an upper U-shaped cross section in the orthogonal short direction, and the opening of the restraining material is closed, for example, a lower U-shaped cross section is formed. The restraint lid member 6 is prepared, and then the core member 2 is positioned and installed at a desired position inside the restraint member 5 laid on the floor surface with a spacer 8.

Concrete (mortar) 7 as a filler is placed in the restraining material 5, and the casting finished surface 9 of the concrete (mortar) 7 is leveled with a trowel or the like to finish the concrete (mortar). After the required strength of No. 7 is developed, the restraining material 5 is covered with the restraining lid material 6, and the restraining lid material 6 and the restraining material 5 are integrally fixed by a fixing means, for example, a welding means.

The core material 2 is installed in a state where the material shaft is laid down along the floor surface and its weak axis y (described as the vertical direction in FIG. 1-B) is parallel to the vertical direction.

In this way, the restraint material 5 is also used as a formwork, and concrete (mortar) 7 is cast, and the restraint material 5 is closed and fixed with the restraint lid material 6 to manufacture a buckling restraint brace 1. It is something to do.

According to the buckling restraint brace and the manufacturing method thereof according to the present invention, it is widely applied to buildings, civil engineering structures (such as steel towers for bridges and power transmission), and geographic structures as long seismic and vibration damping braces. Is.

1 Buckling restraint brace,
2 core material,
3 joints, 3a through holes,
4 unbonded material,
5 Restraint material, 5a Closure material,
6 Restraint lid material, 6a side wall,
7 Concrete (mortar),
8 spacers,
9 Casting finished surface,
11 Buckling restraint brace according to the conventional example,
12 core material,
13 Restraint frame material,
14 Restraint filler (mortar),
15 spacers,
16 Closing board,
17, 18 unbonded material,
19 rib plate,
20a restraint material,
20b restraint material,
a Fillet weld.

Claims (2)

A core material having joints for joining at both ends in the longitudinal direction and surrounded by an unbonded material other than the joints.
A restraining material that also serves as a formwork and has a cross-sectional shape orthogonal to the longitudinal direction formed in an upper U-shaped recess that is large enough to include the core material in a portion other than the joint portion.
A restraint lid material for closing the opening of the recess of the restraint material is prepared.
After that, the core material is positioned at a desired position with a spacer and installed inside the recess of the restraining material laid on the floor.
A filler is placed inside the recess of the restraining material, and the filler is placed inside the recess.
Finish the cast surface of the filler and finish it.
After the required strength of the cast filler is developed, the restraint lid material is covered with the restraint lid material, and the restraint lid material and the restraint material are integrally fixed by a fixing means.
A method of manufacturing a buckling restraint brace characterized by. The core material shall be installed with the material axis laid down along the floor surface and its weak axis parallel to the vertical direction.
The method for manufacturing a buckling restraint brace according to claim 1.

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