CN105386530A - Cross four-angle-steel type bending constraint support - Google Patents

Abstract

The utility model relates to a cross-shaped quadrangular steel type buckling-constrained support, which belongs to the technical field of building structures. The invention can better transmit the axial tension and compression loads, give full play to the performance of the support in dissipating seismic energy, save steel cost and production cycle, and facilitate construction and industrial production. The present invention includes a "ten"-shaped core material, and a non-adhesive material layer is sprayed on the outside of the "ten"-shaped core material; the "ten"-shaped core material is arranged inside four angle steels, and the two "ten"-shaped core materials The end protruding angle steel is set outside the angle steel, and a friction-type high-strength bolt hole is set on the "ten"-shaped core material outside the angle steel; a rectangular shape with a through hole is set between the outer end of the "ten"-shaped core material and two angle steels. Steel block, the bolt passes through the through hole of the rectangular steel block and the angle steel on both sides, and the rectangular steel block and the angle steel are fixedly connected to form a restraint mechanism; there is a gap between the "ten"-shaped core material and the angle steel, and the Stiffeners are fixed on the outside of the angle steel.

Description

Cross-shaped square steel buckling-restrained brace

technical field

The invention belongs to the technical field of building structures, in particular to a cross-shaped quadrangular steel buckling-constrained support, which is suitable for frame structures with buckling-constrained supports.

Background technique

Buckling-restrained bracing is gradually popularized and used in buildings with seismic requirements due to its excellent seismic energy dissipation performance. Its specific advantages are as follows:

1. Buckling-restrained bracing has the characteristics of convenient construction, simple structure, flexible layout, and is suitable for practical engineering applications;

2. Excellent seismic energy consumption performance, arranged in the frame can effectively consume seismic force, reduce the load of the frame, and improve the overall stability of the structure;

3. Saving raw materials, while reducing the waste of concrete and steel, it improves the original mechanical performance and can be reused;

4. Improve the lateral stiffness of the structure, reduce the section size of the load-bearing members, and increase the structural ductility.

Buckling-restrained bracing is a kind of structural anti-lateral force member composed of anti-buckling bracing inner core and restraint members, which rely on the core material to yield energy in tension and compression, and the restraint mechanism provides anti-lateral stiffness. The core material is mainly responsible for the yield energy consumption of tension and compression loads, and the function of the restraint members is to prevent the overall buckling of the inner core when it is under compression and restrain its local buckling, so that the inner core can achieve full yield of the entire cross-section under the action of tension and pressure. . Therefore, in the design and fabrication process of the buckling-restrained brace, it is required that its force transmission be clear, easy to fabricate and construct, and save costs. However, the traditional buckling-restrained bracing usually uses a combination of steel and concrete to form peripheral constraints. This kind of component requires high manufacturing precision, self-heavy and difficult construction, and there is a large additional load on the core unit itself, and the manufacturing method is cumbersome, which leads to its popularization. And the scope of use is limited, and the level of industrialization is low.

Contents of the invention

Aiming at the problems existing in the prior art, the present invention provides a structure that can better transmit axial tension and compression loads, give full play to the performance of dissipating seismic energy of the support, save steel cost and production cycle, and facilitate construction and industrial production. The cruciform quadrilateral buckling-restrained brace.

In order to achieve the above object, the present invention adopts the following technical scheme, a cross-shaped quadrangular steel buckling restraint support, including a "ten"-shaped core material, and a non-adhesive material layer is sprayed on the outside of the "ten"-shaped core material; The "ten"-shaped core material is set inside the four angle steels, and the two ends of the "ten"-shaped core material protrude from the angle steel to be set outside the angle steel, and friction-type high-strength bolt holes are set on the "ten"-shaped core material outside the angle steel; A rectangular steel block with a through hole is arranged between the outer end of the "ten"-shaped core material and two angle steels, and the bolt passes through the through hole of the rectangular steel block and the angle steels on both sides, and the rectangular steel block and the angle steel are fixedly connected There is a gap between the "ten"-shaped core material and the angle steel, and stiffeners are fixed on the outside of the angle steel; the cross-sectional size of the cross-shaped core material located outside the angle steel is larger than the cross-shaped core material located inside the angle steel section size.

The bolts are arranged in four rows, five in each row.

The bolts are arranged alternately with the outer stiffening ribs of the angle steel.

The arrangement and connection mode of the constraint mechanism composed of the bolts, angle steel and rectangular steel blocks.

Beneficial effects of the present invention:

1. The cross-shaped four-angle steel type buckling restraint support of the present invention, the restraint mechanism is composed of angle steel, rectangular steel blocks and bolts, the core unit and its peripheral sprayed epoxy resin and other non-bonded materials are placed inside, and the buckling restraint support can be installed in the factory Prefabrication, the BRB is hoisted by a crane at the construction site, and the buckling restraint support and the joint plate connection of the node are completed on site through friction-type high-strength bolts and nuts; the installation of the buckling restraint support of the present invention may not be included in the total construction period, which is convenient for structural construction processing. It does not affect the construction of the main body of the structure; it is easy to realize industrial production, easy to assemble on site, and accurate on site positioning, which greatly saves installation time and improves engineering efficiency. It is worthy of vigorous development and promotion, and is widely used in actual projects.

2. The cross-shaped angle steel buckling restraint support of the present invention is an all-steel type, and the restraint mechanism composed of angle steel, rectangular steel blocks and bolts provides a larger section moment of inertia for the buckling restraint support, and then provides sufficient lateral rigidity; therefore, the buckling The strength and stiffness of the restrained support have been improved, which conforms to the design principle of yield energy dissipation.

3. Compared with the "ten"-shaped concrete buckling restraint brace, the buckling restraint brace of the present invention has the advantages of convenient construction, simple structure, lightening the self-weight of the support and structure, and fully exerting the strength of steel; Compared with the support, the buckling restrained support of the present invention has the advantages of simple structure, fast construction and production, and excellent energy dissipation capacity.

Description of drawings

Fig. 1 is the structural representation of the cross-shaped four-angle steel type buckling restraint support of the present invention;

Fig. 2 is a schematic cross-sectional view of Fig. 1;

Figure 3 is a partially enlarged view of Figure 1;

In the figure: 1-bolt, 2-angle steel, 3-"ten"-shaped core material, 4-rectangular steel block, 5-unbonded material layer, 6-stiffening rib, 7-friction type high-strength bolt hole.

detailed description

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Fig. 1, Fig. 2 and Fig. 3, a cross-shaped four-angle steel-type buckling restraint support includes a "ten"-shaped core material 3, and a non-adhesive material layer 5 is sprayed on the outside of the "ten"-shaped core material 3 , the setting of the non-adhesive material layer 5 can ensure that the "ten"-shaped core material 3 has sufficient relative movement when it is under tension and compression, and reduces frictional resistance. The non-adhesive material can be epoxy resin; the "ten" The glyph-shaped core material 3 is set inside the four angle steels 2, the two ends of the "ten"-shaped core material 3 protrude from the angle steel 2 and is set outside the angle steel 2, and the "ten"-shaped core material 3 outside the angle steel 2 is provided with a friction type high-strength Bolt hole 7; a rectangular steel block 4 with a through hole is arranged between the outer end of the "ten"-shaped core material 3 and two angle steels 2, and the bolt 1 passes through the through hole of the rectangular steel block 4 and the holes on both sides Angle steel 2, the rectangular steel block 4 and angle steel 2 are fixedly connected to form a restraint mechanism; there is a gap between the "ten"-shaped core material 3 and the angle steel 2 without direct contact, and a stiffening rib 6 is fixed on the outside of the angle steel 2 . The bolts 1 are interlaced with the outer stiffeners 6 of the angle steel 2 ;

Arrangement and connection of the constraint mechanism composed of the bolt 1 , the angle steel 2 and the rectangular steel block 4 .

The connection between the angle steel 2 and the bolt 1 of the rectangular steel block 4, and the assembly of the "ten"-shaped core material 3 and the restraint mechanism are completed in the factory. The buckling-constrained support is directly hoisted in place on site, and the buckling-constrained support is connected to the prefabricated gusset plate through friction-type high-strength bolts by using the friction-type high-strength bolt hole 7 .

The number and size of the friction-type high-strength bolt holes 7 at both ends of the "ten"-shaped core material 3 are determined according to actual needs. The size and length of the "ten"-shaped core material 3 are determined according to the actual bearing capacity and structural size requirements, and the size of the angle steel 2 and the rectangular steel block 4 and the type of the bolt 1 are arranged according to the stability requirements. Bolts 1 are arranged in four rows, five in each row (also can be properly encrypted).

Claims (4)

1. a cross four angle steel formula buckling restrained brace, is characterized in that comprising " ten " font core, is coated with non-cohesive material layer in the outside of " ten " font core; Described " ten " font core is arranged on four angle steel inside, and the two ends of " ten " font core are stretched out angle steel and are arranged on angle steel outside, and " ten " font core of angle steel outside is provided with frictional high-strength bolts hole; Between the outer end of " ten " font core, two blocks of angle steel, arrange the rectangle bloom with through hole, rectangle bloom and angle steel, through the described through hole of rectangle bloom and the angle steel of both sides thereof, are fixedly connected into constraint mechanism by bolt; Leave gap between described " ten " font core and angle steel, be fixed with in the outside of angle steel floor of putting more energy into; The sectional dimension being positioned at the cross core of angle steel outside is greater than the sectional dimension of the cross core being positioned at angle steel inside.

2. cross four angle steel formula buckling restrained brace according to claim 1, is characterized in that described bolt is that four arrangements are put, and often five roads are put in arrangement.

3. cross four angle steel formula buckling restrained brace according to claim 1, the floor that it is characterized in that putting more energy into outside described bolt and angle steel is crisscross arranged.

4. cross four angle steel formula buckling restrained brace according to claim 1, is characterized in that the layout connected mode of the constraint mechanism that described bolt and angle steel and rectangle bloom form.