WO2015018222A1

WO2015018222A1 - Prefabricated assembled type buckling-restrained brace

Info

Publication number: WO2015018222A1
Application number: PCT/CN2014/078606
Authority: WO
Inventors: 陈泉; 葛汉彬; 曾滨; 孟少平; 王春林
Original assignee: 东南大学
Priority date: 2013-08-05
Filing date: 2014-05-28
Publication date: 2015-02-12
Also published as: CN103362232A

Abstract

A prefabricated assembled type buckling-restrained brace comprises a core component (1) and constrained components (2). The number of the constrained components (2) is two. Each of the constrained components (2) consists of a groove (2-1) and filler (2-2). The filler (2-2) is located in the groove (2-1) and is fixedly connected to the groove (2-1). The core component (1) is located between the two constrained components (2). The filler (2-2) of the constrained components (2) only restrain a part zone of the core component (1) along the width direction of the core component (1). The buckling-restrained brace has heavy weight, and the proportion of the material of the constrained components in the whole brace is small.

Description

Prefabricated assembled buckling restraint support

The invention belongs to the field of civil engineering and relates to a buckling constraint support for reducing the impact of engineering structures on earthquake disasters. Background technique

Buckling restraint support is a device that uses metal yield to dissipate seismic energy. Due to its stable performance, convenient fabrication and low cost, it has been widely studied and applied in recent years.

At present, most of the buckling restraint supports commonly used in engineering in China are composed of internal concrete or mortar steel pipes as constraining parts and core components subjected to axial force, such as the technical solution given in the published invention patent (CN100560884C). The restraining member does not directly bear the axial load. Under the external pressure, the low-order buckling of the core component can be suppressed. The core component yields under the tensile force and pressure, and the hysteresis curve of the component is full.

However, the above-mentioned buckling restraint support scheme also has the following problems: (1) To ensure that the buckling constraint support does not suffer from overall instability under axial pressure, the cross-section of the constraining member should have a large moment of inertia. Therefore, the constraining components are large, and eventually the entire buckling restraint supports a large self-weight. Especially when the buckling restraint support is applied to a bridge or a large span structure, the overall bending capacity requirement of the restraining component will increase as the span increases, and the cross-sectional size and self-weight of the restraining component will also increase, which makes the construction more difficult. 2 The concrete or mortar in the steel pipe needs to be injected from one end. It is difficult to vibrate after the concrete or mortar is injected. The compactness is difficult to guarantee. If self-compacting concrete is used, the cost of buckling restraint support is higher. 3 When the buckling constraint support is long, the overall weight is very large, which makes transportation difficult.

Summary of the invention

The present invention provides a prefabricated assembled buckling restraint support in order to solve the problem that the buckling constraint support is self-contained and the constraining component material accounts for the entire support ratio.

The technical solution adopted by the present invention is: a prefabricated assembled buckling restraint support, comprising a core component and a constraining component; the constraining component is two pieces, consisting of a groove and a filling body, wherein the filling body is located in the groove, and Attached to the groove, the core member is located between the two constraining members, and the filler body of the constraining member is only in close contact with the surface of the constraining region of the core member.

Preferably, the cross section of the recess of the constraining member is U-shaped or semi-circular or folded.

Preferably, the filling body of the restraining member is a concrete or mortar block or a thin-walled member; the surface of the mortar or concrete block contacting the core member is provided with a pre-embedded sheet; the thin-walled member is a square tube or a groove The shape or the L-shaped member is placed in the groove to form a cavity filled with concrete or mortar. Preferably, the constraining member is composed of a groove partially filled by two filling bodies, and the two filling bodies are respectively in contact with the two inner side walls of the groove, and the filling body is fixed to the bottom surface of the groove.

Preferably, the constraining member is constructed by partially filling a recess by a filler body that is centrally placed and secured to the bottom surface of the recess.

Preferably, the core component is clamped in the middle of the constraining component, and the filling slats are located on two sides in the plane of the core plate, and the two constraining components are respectively fixed integrally with the filling slats in the longitudinal direction, or the longitudinal side walls of the constraining components are longitudinally A plurality of pairs of bolt seats are welded, and the bolts are fixed by pulling through the bolt seat and the filling strip.

Preferably, the core component is located between two constraining components, and the two constraining components are relatively staggered and fixed; one inner side wall of the constraining component is in contact with and fixed to an outer sidewall of another constraining component, each block One top surface of the constraining member is in contact with the filling body of another constraining member.

Preferably, the groove is provided with a notch, and an enlarged portion of the central portion of the core member is embedded in the notch.

Preferably, the core component is composed of a flat plate and a stiffening rib, the flat plate is a piece, and the stiffening ribs are two groups, each set of stiffening ribs are respectively located at two ends of the flat plate, and are placed in a blank area formed by the groove and the filling body. Inside, the stiffener is fixed to the unconstrained area of the plate along the length of the plate.

Preferably, each of the two stiffeners corresponding to each other along the longitudinal direction of the flat plate at both ends of the flat plate is integrally joined by a slat. The invention has the following beneficial effects:

1. Compared with the conventional buckling restraint support, the constraining member does not completely adhere to the entire core plate, and the constraining member only constrains a part of the core plate along the width direction of the core member, and the material of the constraining member is distributed on the outermost side of the buckling restraint support. The material utilization efficiency can be maximized under the influence of the buckling restraint support performance, so that the proportion of the constraining component in the whole support is smaller than that of the conventional buckling restraint support, and the self-weight of the buckling restraint support is significantly reduced. It can solve the key problems of buckling restraint support in the large-span structure such as bridges, such as large deflection and difficult construction, which greatly expands the application range of buckling restraint support.

2, the restraining component and the core board of the invention can be pre-made in the factory, avoiding the problems of long curing time and vibration of the concrete in the traditional buckling restraint support, and significantly improving the manufacturing efficiency of the buckling restraint support; the restraining component and the core board It can be assembled at the construction site to solve the problem of inconvenient transportation caused by excessive weight of large buckling restraint support. The materials are mainly ordinary steel and concrete, which are convenient to take, low in cost, and short in processing cycle, so that buckling restraint support Adapt to the requirements of industrialization of construction.

3. After the core plate supported by the invention is damaged, the restraining component can be disassembled and reused, and only the core plate can be replaced, which significantly reduces the maintenance cost of the buckling restraint support. 4. There is a blank area between the support constraint member and the core plate of the present invention, and the stiffener can be directly placed on the blank area, which simplifies the design of the buckling constraint support connector with respect to the traditional buckling constraint support.

DRAWINGS

1 is a schematic view showing a support installation position according to Embodiment 1 of the present invention;

2 is a schematic exploded view showing the structure of a supporting core board according to Embodiment 1 of the present invention;

3 is a schematic exploded view showing the structure of Embodiment 1 of the present invention;

4 is a schematic structural view of Embodiment 1 of the present invention;

Figure 5 is a cross-sectional view taken along line A-A of Figure 4;

Figure 6 is a cross-sectional view taken along line B-B of Figure 4;

Figure 7 is a cross-sectional view showing a filling body of a square tube according to Embodiment 2 of the present invention;

Figure 8 is a cross-sectional view showing a state in which the filling body is a channel member according to Embodiment 2 of the present invention;

Figure 9 is a cross-sectional view showing a state in which the filling body is an L-shaped member according to Embodiment 2 of the present invention;

Figure 10 is a schematic exploded view showing the structure of Embodiment 3 of the present invention;

Figure 11 is a schematic structural view of Embodiment 3 of the present invention;

Figure 12 is a cross-sectional view taken along line C-C of Figure 11;

Figure 13 is a cross-sectional view taken along line D-D of Figure 11;

Figure 14 is a schematic exploded view showing the structure of Embodiment 4 of the present invention;

Figure 15 is a schematic structural view of Embodiment 4 of the present invention;

Figure 16 is a cross-sectional view taken along line E-E of Figure 11;

Figure 17 is a cross-sectional view taken along line F-F of Figure 11;

18 is an exploded perspective view showing the structure of a supporting core board according to Embodiment 5 of the present invention;

Figure 19 is a schematic exploded view showing the structure of Embodiment 5 of the present invention;

Figure 20 is a schematic structural view of Embodiment 5 of the present invention;

Figure 21 is a cross-sectional view taken along line G-G of Figure 20;

Figure 22 is a cross-sectional view taken along line H-H of Figure 20;

23 is an exploded perspective view showing the structure of a supporting core board according to Embodiment 6 of the present invention;

Figure 24 is a schematic structural view of Embodiment 6 of the present invention;

Figure 25 is a cross-sectional view taken along line G-G of Figure 20;

Figure 26 is a cross-sectional view taken along line HH of Figure 20; Figure 27 is a cross-sectional view showing a filling body of a square tube according to Embodiment 5 of the present invention;

Figure 28 is a cross-sectional view showing a state in which the filling body is a channel member according to Embodiment 5 of the present invention;

Figure 29 is a cross-sectional view showing the filling of concrete or mortar in a cavity of Embodiment 5 of the present invention;

Figure 30 is a schematic view showing the support mounting position of the embodiment 5 of the present invention.

detailed description

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

Example 1

As shown in FIG. 1 to FIG. 6 : A prefabricated assembled buckling restraint support, comprising: a core component 1 and a constraining component 2; the constraining component 2 is two pieces, by a groove 2-1 and a filling body 2 2, the groove 2-1 has a U-shaped cross section, and the filling body 2-2 is a concrete or mortar block located in the groove 2-1 and fixed to the groove 2-1, two concrete Or the mortar blocks 2-2 are respectively in contact with the two inner side walls of the groove 2-1, the concrete or mortar block 2-2 is fixed to the bottom surface of the groove 2-1, and the core member 1 is located at the two constraint members 2 The core plate 1 is composed of a flat plate 1-1 and a stiffening rib 1-2. The flat plate 1-1 has a restraining area 1-1-1 and a non-constrained area 1-1-2, and the stiffening rib 1-2 is two. The groups are respectively located at the two ends of the flat plate 1-1, and are placed in the blank area formed by the groove 2-1 and the filling body 2-2, and the stiffening rib 1-2 is along the length direction of the flat plate and the unconstrained area of the flat plate 1 - 1-2 fixed. The concrete or mortar block 2-2 of the restraining member 2 is only in close contact with the surface of the restraining region 1-1-1; the two restraining members 2 are relatively staggered and fixedly connected, one inner side wall of the restraining member 2 and the other One outer side wall of one piece of the restraining member 2 is in contact with and fixed, and one top surface of each of the restraining members 2 is in contact with the concrete or mortar block 2-2 of the other piece of the restraining member 2. As shown in Fig. 1, the core member 1 of the buckling restraint support of the present embodiment is bolted or welded to the gusset plate 7 of the building through the joint plate 6.

Example 2

As shown in Figures 7-9: This embodiment is the same as the rest of Embodiment 1, except that: the concrete or mortar block 2-2 is a thin-walled member, and the thin-walled steel can be a square tube or a grooved member. Or an L-shaped piece, placed in the groove to form a cavity, the cavity can be filled with concrete or mortar.

Example 3

10 to 13: This embodiment is the same as the rest of Embodiment 1, except that: the core member 1 is sandwiched between the restraining members 2, and the filling slats 3 are located on both sides of the plane of the core member 1. The two pieces of the constraining member 2 are integrally fixed to the filling slats 3 in the longitudinal direction.

Example 4

14 to 17: This embodiment is the same as the rest of Embodiment 1, except that: the core component 1 Clamped in the middle of the restraining member 2, the filling slats 3 are located on both sides of the plane of the core member 1, and a plurality of pairs of bolt seats 4 are longitudinally welded on the side walls of the two pieces of the constraining member 2, and the bolts 5 pass through the bolt seat 4 and the filling slats 3 The pull is formed into a fixed joint.

Example 5

18 to 22, 27 to 30: This embodiment is the same as the rest of Embodiment 1, except that: the constraining member 2 is partially filled with a recess 2-1 by a filling body 2-2. The filling body 2-2 is centrally placed and fixed on the bottom surface of the groove 2-1, and the stiffening ribs 1-2 are two groups, respectively located at two ends of the flat plate 1-1, and each set of stiffeners 1-2 is four pieces. And placed in the blank area formed by the groove 2-1 and the filling body 2-2, the stiffening rib 1-2 is fixed to the unconstrained area 1-1-2 of the flat plate along the longitudinal direction of the flat plate.

Example 6

As shown in Figures 23~26: This embodiment is the same as the rest of Embodiment 5, except that: each of the two longitudinally facing stiffeners 1-2 is connected by a slat to form a unit, and the flat plate The unconstrained area 1-1-2 is fixed.

It should be noted that a number of modifications and refinements may be made by those skilled in the art without departing from the principles of the invention, and such modifications and refinements are also considered to be within the scope of the invention. The components not specifically defined in this embodiment can be realized by the prior art.

Claims

Claim

A prefabricated assembled buckling restraint support, comprising: a core component and a constraining component; the constraining component is two pieces, consisting of a groove and a filling body, the filling body is located in the groove, and is concave The trough is fixed, the core member is located between the two constraining members, and the filling body of the constraining member is only in close contact with the surface of the constraining region of the core member.

2. The prefabricated assembled buckling restraint support according to claim 1, wherein: the cross section of the recess of the constraining member is U-shaped or semi-circular or folded.

3. The prefabricated assembled buckling restraint support according to claim 1, wherein: the filling body of the restraining member is a concrete or mortar block or a thin-walled member; and the surface of the mortar or concrete block contacting the core member The embedded member sheet is disposed; the thin-walled member is a square tube or a trough member or an L-shaped member, and is placed in the groove to form a cavity, and the cavity is filled with concrete or mortar.

4. The prefabricated assembled buckling restraint support according to claim 1, wherein: the constraining member is formed by partially filling a groove with two filling bodies, and the two filling bodies are respectively in contact with the two inner side walls of the groove. The filler body is fixed to the bottom surface of the groove.

5. The prefabricated assembled buckling restraint support according to claim 1, wherein: the constraining member is formed by partially filling a groove with a filling body, the filling body being centrally placed and fixed to a bottom surface of the groove.

6. The prefabricated assembled buckling restraint support according to claim 1, wherein: the core member is clamped in the middle of the constraining member, the filling slats are located on two sides in the plane of the core plate, and the two constraining members are respectively filled and filled in the longitudinal direction. The slats are integrally fixed, or a plurality of pairs of bolt seats are longitudinally welded on the outer side wall of the restraining member, and the bolts are fixedly connected by the bolt seat and the filling slats.

7. The prefabricated assembled buckling restraint support according to claim 1, wherein: the core member is located between two constraining members, and the two constraining members are relatively staggered and fixed; an inner side wall of the constraining member Contacting and fixing one outer side wall of the other constraining member, one top surface of each of the constraining members is in contact with the filling body of the other of the constraining members.

8. The prefabricated assembled buckling restraint support according to claim 7, wherein: the groove is provided with a notch, and an enlarged portion of the central portion of the core member is embedded in the notch.

9. The prefabricated assembled buckling restraint support according to claim 1, wherein: the core member is composed of a flat plate and a stiffener, the flat plate is a piece, and the stiffeners are two groups, and each set of stiffeners is respectively located on the flat plate. The two ends are placed in the blank area formed by the groove and the filling body, and the stiffening rib is fixed to the unconstrained area of the flat plate along the longitudinal direction of the flat plate.

10. The prefabricated assembled buckling restraint support according to claim 9, wherein: each of the two stiffeners corresponding to the longitudinal direction of the flat plate at both ends of the flat plate is integrally connected by the slats.