CN106592803B - A strength-adjustable restrained buckling bracing device - Google Patents

Abstract

A strength-adjustable restrained buckling bracing device includes a core plate, an outer steel pipe, a rib plate and a limit baffle. The core plate is a "one"-shaped steel plate, which is located inside the outer casing steel pipe, and the outer casing steel pipe is extended at both ends; the cross-sectional shape of the outer casing steel pipe is rectangular, and rectangular holes and grooves are opened at equal intervals on the two planes of the outer casing pipe parallel to the plane of the core plate. One side is welded with the rib plate, and bolt holes are opened on the rib plate; the limit baffle is a rectangular steel plate, and the cross-sectional size is slightly smaller than the size of the hole and groove of the outer casing. Against the core plate, the limit baffle plate and the rib plate are fixed by high-strength bolts. The position and number of the limit baffle plate are determined according to the strength requirements. , limit the buckling order of the core plate, and then control its compressive bearing capacity. Through the reasonable arrangement of the limit baffle, the goal of adjustable strength can be achieved, and it can be widely used in the energy consumption and shock absorption of buildings.

Description

A constrained buckling bracing device with adjustable strength

technical field

The invention belongs to the field of civil engineering, and relates to a constrained buckling support device with adjustable strength, which is suitable for engineering structures with constrained buckling supports and is used for energy consumption and shock absorption of the engineering structures.

Background technique

Constrained buckling brace is also known as buckling restraint brace, buckling restrained brace BRB, Buckling restrained brace. In 1971, Japanese scholars first proposed the concept of restrained buckling brace, and carried out experimental research on restrained buckling brace with shear wall as external restraint. Subsequently, constrained buckling bracing has been widely used in the field of building structures due to its good energy dissipation performance. Constrained buckling braces usually consist of a bracing core, peripheral restraining members, and filler material. Peripheral restraint members and internal filling materials do not participate in the axial force, and only restrain the inner core of the support to buckling under compression; under the action of small earthquakes, the restrained buckling supports can provide considerable initial lateral stiffness for the building structure; under moderate and large earthquakes Under the action of the restrained buckling bracing, the inner core plate does not buckling due to the restraint of the peripheral restraining members and the filling material, and can yield under tension and compression, thereby dissipating the input seismic energy and ensuring the safety of the main structure.

Due to the different heights and spans of the building structure, the length and arrangement angle of the supports result in different strengths provided by the supports. When the plate section size is determined, the compressive bearing capacity of the constrained buckling bracing cannot be controlled; for different structures, the constrained buckling bracing needs to be redesigned and customized, and the degree of industrialization is low. At home and abroad, there is no report on the related research on the strength-adjustable restrained buckling bracing.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the defects of the existing restrained buckling support, and provide a restrained buckling support with adjustable strength, which has the performance of adjustable strength according to the layout position and number of the limit baffles, and can better meet the engineering application. needs.

Technical scheme of the present invention:

A restrained buckling support device with adjustable strength, including a core plate, an outer steel pipe, a rib plate and a limit baffle; Bolt holes are provided at the ends to connect the support device to the beam-column joint; the cross-sectional shape of the outer steel pipe is rectangular, and the opening end plates are welded at both ends of the outer steel pipe. The shape of the opening end plate is rectangular, and the size of the opening end plate is larger than The cross-sectional size of the core plate, the opening end plate fixes the core plate on the axis of the outer steel pipe; rectangular holes are opened at equal intervals on the two planes of the outer steel pipe parallel to the plane of the core plate. Bolt holes are opened on the plate; the limit baffle is a rectangular steel plate, and the cross-sectional size is smaller than the size of the hole slot of the outer steel pipe. Insert the limit baffle vertically into the hole opened by the outer steel pipe to press against the core plate; There are vertical holes and grooves on the plate, and the positions of the vertical holes and grooves correspond to the positions of the bolt holes on the rib, and the limit baffles and the rib plates are fixed by high-strength bolts. The position and number of the limit baffles are arranged according to the strength. The requirements are determined, and the layout is arranged in pairs on both sides, the purpose is to restrain the out-of-plane deformation of the core plate, limit the buckling order of the core plate, and then control its compressive bearing capacity to achieve the purpose of adjustable strength.

The effects and benefits of the present invention are: the present invention achieves the goal of adjustable compressive yield strength of the device through the reasonable arrangement of the limit baffles; A variety of bearing capacities can be provided without changing the size of the core plate and the outer steel pipe, which is more convenient for design and engineering practice.

The invention can be widely used in energy consumption and shock absorption of buildings.

Description of drawings

Figure 1 is a partial enlarged view of the position of a restrained buckling brace with adjustable strength and a limit baffle.

FIG. 2 is an A-A section of FIG. 1 .

FIG. 3 is a B-B section of FIG. 1 .

In the picture: 1 outer steel pipe; 2 core plate; 3 limit baffle; 4 outer steel pipe hole groove; 5 rib plate;

6. High-strength bolts used to fix the limit baffle; 7. Vertical hole and groove opened by the limit baffle.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and embodiments.

As shown in Figures 1 and 2, a restrained buckling support device with adjustable strength includes a core plate 2, an outer steel pipe 1, a rib plate 5 and a limit baffle 3. The core plate 2 bears the axial load, and the outer steel pipe 1 is used as a component for fixing the limit baffle 3 and does not bear the axial load. The core plate 2 is a "one"-shaped steel plate, which is located inside the outer casing steel pipe 1, and the outer casing steel pipe 1 is extended at both ends. Bolt holes are provided at both ends of the core plate 2 for connecting the support device to the beam-column node; the outer casing steel pipe 1 has a cross section. The shape is a rectangle, and the opening end plates are welded at both ends of the outer steel pipe 1. The shape of the opening is a rectangle, and the size of the opening is slightly larger than the cross-sectional size of the core plate 2. The main function of the opening end plate is to fix the core plate 2 on the outer steel pipe 1. On the axis, rectangular holes 4 are opened at equal intervals on the two planes of the outer steel pipe 1 parallel to the plane of the core plate 2, the longitudinal side of the hole groove 4 is welded with the rib 5, and the rib 5 is provided with bolt holes for fixing the limiter. Position baffle 3; The limit baffle 3 is a rectangular steel plate, and the cross-sectional size is slightly smaller than the size of the hole slot 4 opened by the outer steel pipe 1, and the limit baffle 3 is vertically inserted into the hole slot 4 opened by the outer steel pipe 1, against the core Plate 2, a vertical hole slot 7 is opened on the limit baffle 3, and the position of the vertical hole slot 7 corresponds to the position of the bolt hole on the rib plate 5. The function of the vertical hole slot 7 is to Adjust the thickness of the limit baffle 3 into the hole groove 4 to ensure that the limit baffle 3 is in contact with the core plate 2, and the limit baffle 3 and the rib plate 5 are fixed by high-strength bolts 6. The limit baffle 3 is arranged The position and number are determined according to the strength requirements, and the arrangement is arranged in pairs on both sides. The purpose is to restrain the out-of-plane deformation of the core plate 2, limit the buckling order of the core plate 2, and then control its compressive bearing capacity to achieve the purpose of adjustable strength. .

Claims (1)

1. A restraint buckling support device with adjustable strength, it is characterized in that, this restraint buckling support device comprises core plate, outer jacket steel pipe, rib plate and limit baffle plate; , the outer steel pipes are extended at both ends, and bolt holes are provided at both ends of the core plate for the connection of the support device to the beam-column joint; The shape of the plate is a rectangle, the size of the opening end plate is larger than the cross-sectional size of the core plate, and the opening end plate fixes the core plate on the axis of the outer steel pipe; the two planes of the outer steel pipe parallel to the plane of the core plate are equally spaced. The longitudinal side of the hole groove is welded with the rib plate, and bolt holes are provided on the rib plate; the limit baffle is a rectangular steel plate, and the cross-sectional size is smaller than the size of the hole and groove of the outer steel pipe. Insert the limit baffle vertically into the hole groove opened by the outer steel pipe. In the middle, press against the core plate; open vertical holes and grooves on the limit baffle, the positions of the vertical holes and grooves correspond to the positions of the bolt holes on the rib, and the limit baffle and the rib are fixed by high-strength bolts , the arrangement position and quantity of the limit baffles are determined according to the strength requirements, and the arrangement form is arranged in pairs on both sides.

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