CN106592803B

CN106592803B - Buckling restrained brace device with adjustable strength

Info

Publication number: CN106592803B
Application number: CN201611005525.XA
Authority: CN
Inventors: 李钢; 董志骞; 李涛
Original assignee: Dalian University of Technology
Current assignee: Dalian University of Technology
Priority date: 2016-11-11
Filing date: 2016-11-11
Publication date: 2022-05-13
Anticipated expiration: 2036-11-11
Also published as: CN106592803A

Abstract

A buckling restrained brace device with adjustable strength comprises a core plate, an outer sleeve steel pipe, a rib plate and a limiting baffle. The core plate is a steel plate in a shape of a Chinese character 'yi', is positioned inside the outer sleeve steel pipe, and two ends of the core plate extend out of the outer sleeve steel pipe; the section of the outer sleeve steel pipe is rectangular, rectangular hole grooves are formed in two planes of the outer sleeve parallel to the plane of the core plate at equal intervals, one side of each hole groove is welded with a rib plate, and bolt holes are formed in the rib plate; the limiting baffle is a rectangular steel plate, the cross section size of the limiting baffle is slightly smaller than the size of the hole groove formed in the outer sleeve, the limiting baffle is vertically inserted into the hole groove formed in the outer sleeve steel pipe and abuts against the core plate, the limiting baffle and the rib plate are fixed through high-strength bolts, the arrangement position and the number of the limiting baffle are determined according to the strength requirement, the arrangement form is that two sides are arranged in pairs, the purpose is to restrain the out-of-plane deformation of the core plate, the buckling order of the core plate is limited, and the pressure bearing capacity of the limiting baffle is controlled. The aim of adjustable strength can be achieved through reasonable arrangement of the limiting baffle, and the energy-consuming and shock-absorbing device can be widely applied to energy consumption and shock absorption of buildings.

Description

Buckling restrained brace device with adjustable strength

Technical Field

The invention belongs to the field of civil engineering, and relates to a buckling restrained brace device with adjustable strength, which is suitable for an engineering structure with a buckling restrained brace and is used for energy dissipation and shock absorption of the engineering structure.

Background

In 1971, a japanese scholar first proposes the concept of Buckling restrained brace and develops experimental study on the Buckling restrained brace using a shear wall as external restraint. Subsequently, the buckling restrained brace is widely applied to the field of building structures with good energy dissipation performance. Buckling restrained braces typically consist of a brace inner core, a peripheral restraining member, and a filler material. The peripheral restraining component and the internal filling material do not participate in axial stress, and only the support inner core is restrained from buckling under pressure; under the action of small earthquake, the buckling restrained brace can provide considerable initial lateral stiffness for the building structure; under the action of medium and large earthquakes, the buckling restrained brace has the advantages that due to the restraint of the peripheral restraining members and the filling materials, the inner core plate is not buckled, and can be buckled when being pulled and pressed, so that the input earthquake energy is dissipated, and the safety of the main body structure is ensured.

Because the height and the span length of the building structure are different, the lengths and the arrangement angles of the supports cause different strengths provided by the supports, if the support lengths are changed, the bearing capacity of the supports can be greatly changed even if the construction forms are the same, and the magnitude of the bearing capacity of the buckling restrained brace under pressure cannot be controlled under the condition that the cross section dimension of the inner core plate is determined; for different structures, the buckling restrained brace needs to be redesigned and customized, and the industrialization degree is low. Relevant researches on the aspect of the strength-adjustable buckling restrained brace at home and abroad are not reported.

Disclosure of Invention

The invention aims to overcome the defects of the existing buckling restrained brace, provides the buckling restrained brace with adjustable strength, has the performance of adjustable strength according to the difference of the arrangement position and the number of the limit baffles, and can better meet the requirements of engineering application.

The technical scheme of the invention is as follows:

a buckling restrained brace device with adjustable strength comprises a core plate, an outer sleeve steel pipe, a rib plate and a limiting baffle plate; the core plate is a steel plate in a shape of a Chinese character 'yi', is positioned inside the outer sleeve steel pipe, two ends of the core plate extend out of the outer sleeve steel pipe, and bolt holes are formed in the end parts of the two ends of the core plate and are used for connecting the supporting device with beam column joints; the section of the outer sleeve steel pipe is rectangular, the two ends of the outer sleeve steel pipe are welded with the hole-opening end plates, the hole-opening end plates are rectangular, the size of the hole-opening end plates is larger than that of the section of the core plate, and the hole-opening end plates fix the core plate on the axis of the outer sleeve steel pipe; rectangular hole grooves are formed in two planes of the outer sleeve steel pipe parallel to the plane of the core plate at equal intervals, one longitudinal side of each hole groove is welded with a rib plate, and bolt holes are formed in the rib plate; the limiting baffle is a rectangular steel plate, the cross section size of the limiting baffle is smaller than the size of the hole groove formed in the outer sleeve steel pipe, and the limiting baffle is vertically inserted into the hole groove formed in the outer sleeve steel pipe and abuts against the core plate; the limiting baffle is provided with vertical hole grooves, the positions of the vertical hole grooves correspond to the positions of the bolt holes in the rib plates, the limiting baffle and the rib plates are fixed through high-strength bolts, the arrangement positions and the number of the limiting baffle are determined according to the strength requirement, and the limiting baffle is arranged in a mode that two sides are arranged in pairs.

The invention has the advantages that: the device achieves the aim of adjustable yield strength under pressure by reasonable arrangement of the limiting baffle; meanwhile, the buckling strength under compression can be controlled according to the position and the number of the limiting baffle plates, so that various bearing capacities can be provided under the condition of not changing the sizes of the core plate and the outer sleeve steel pipe, and the bearing plate is more conveniently applied to design and engineering practice.

The invention can be widely applied to energy dissipation and shock absorption of buildings.

Drawings

FIG. 1 is a partially enlarged view of a buckling restrained brace with adjustable strength and a position of a limit baffle.

Fig. 2 is a cross-section a-a of fig. 1.

Fig. 3 is a section B-B of fig. 1.

In the figure: 1, sleeving a steel pipe externally; 2, a core board; 3, a limit baffle; 4, sleeving a steel pipe hole groove; 5, a rib plate;

6 fixing a high-strength bolt used by the limit baffle; 7 vertical hole grooves are formed in the limiting baffle.

Detailed Description

The invention will be further described with reference to the following figures and examples.

As shown in fig. 1 and 2, the buckling restrained brace device with adjustable strength comprises a core plate 2, an outer sleeve steel pipe 1, a rib plate 5 and a limit baffle 3. The core plate 2 bears the axial load, and the outer sleeved steel pipe 1 is used as a component for fixing the limiting baffle 3 and does not bear the axial load. The core plate 2 is a steel plate in a shape of a straight line, is positioned inside the outer sleeve steel pipe 1, two ends of the core plate extend out of the outer sleeve steel pipe 1, and bolt holes are formed in the end parts of two ends of the core plate 2 and are used for connecting the supporting device with beam column joints; the section of the outer sleeve steel pipe 1 is rectangular, the two ends of the outer sleeve steel pipe 1 are welded with the opening end plates, the opening is rectangular, the opening size is slightly larger than the section size of the core plate 2, the opening end plates are mainly used for fixing the core plate 2 on the axis of the outer sleeve steel pipe 1, rectangular hole grooves 4 are formed in two planes of the outer sleeve steel pipe 1 parallel to the plane of the core plate 2 at equal intervals, one longitudinal side of each hole groove 4 is welded with a rib plate 5, and bolt holes are formed in the rib plate 5 and used for fixing the limiting baffle plates 3; the limiting baffle 3 is a rectangular steel plate, the sectional dimension is slightly smaller than the dimension of the hole groove 4 formed in the outer sleeve steel pipe 1, the limiting baffle 3 is vertically inserted into the hole groove 4 formed in the outer sleeve steel pipe 1 to abut against the core plate 2, the vertical hole groove 7 is formed in the limiting baffle 3, the position of the vertical hole groove 7 corresponds to the position of a bolt hole in the rib plate 5, the vertical hole groove 7 is used for adjusting the distance of the limiting baffle 3 inserted into the hole groove 4 according to the thickness of the core plate 2, the limiting baffle 3 is ensured to be in contact with the core plate 2, the limiting baffle 3 and the rib plate 5 are fixed through the high-strength bolt 6, the arrangement position and the number of the limiting baffle 3 are determined according to the strength requirement, the arrangement form is that the two sides are arranged in pairs, the purpose of restraining the out-of-plane deformation of the core plate 2 and limiting the buckling order of the core plate 2 is achieved, and further the pressure bearing capacity of the limiting baffle is controlled, and the purpose of adjusting the strength is achieved.

Claims

1. A buckling restrained brace device with adjustable strength is characterized by comprising a core plate, an outer sleeve steel pipe, a rib plate and a limiting baffle plate; the core plate is a steel plate in a shape of a Chinese character 'yi', is positioned inside the outer sleeve steel pipe, two ends of the core plate extend out of the outer sleeve steel pipe, and bolt holes are formed in the end parts of the two ends of the core plate and are used for connecting the supporting device with beam column joints; the section of the outer sleeve steel pipe is rectangular, the two ends of the outer sleeve steel pipe are welded with the hole-opening end plates, the hole-opening end plates are rectangular, the size of the hole-opening end plates is larger than that of the section of the core plate, and the hole-opening end plates fix the core plate on the axis of the outer sleeve steel pipe; rectangular hole grooves are formed in two planes of the outer sleeve steel pipe parallel to the plane of the core plate at equal intervals, one longitudinal side of each hole groove is welded with a rib plate, and bolt holes are formed in the rib plate; the limiting baffle is a rectangular steel plate, the section size of the limiting baffle is smaller than the size of the hole groove formed in the outer sleeve steel pipe, and the limiting baffle is vertically inserted into the hole groove formed in the outer sleeve steel pipe and abuts against the core plate; the limiting baffle is provided with vertical hole grooves, the positions of the vertical hole grooves correspond to the positions of the bolt holes in the rib plates, the limiting baffle and the rib plates are fixed through high-strength bolts, the arrangement positions and the number of the limiting baffle are determined according to the strength requirement, and the arrangement form is that two sides are arranged in pairs.