CN216739227U - Super-long strong-energy-consumption self-resetting buckling-restrained brace - Google Patents

Abstract

The application discloses an ultra-long high-energy-dissipation self-reset anti-buckling support, which relates to the technical field of shock absorption of large-span bridge structures. The anti-buckling support includes an outer sleeve, an energy-dissipating inner core, an inner sleeve and a self-resetting component that are coaxially sleeved from outside to inside. The outer sleeve, the energy-dissipating inner core and the inner sleeve are fixed by a plurality of The parts are fixedly connected, and the outer sleeve and the energy-dissipating inner core and the gap between the energy-dissipating inner core and the inner sleeve are all provided with non-bonded sliding plates; There are yielding sections on both sides for energy dissipation, the other end of each yielding section is provided with a connecting section, and both ends of the energy dissipation inner core are provided with a bottom plate. The present application is used to improve the seismic safety and post-earthquake recovery of long-span bridges under the action of strong earthquakes.

Description

An ultra-long self-reset anti-buckling bracing with strong energy dissipation

technical field

The present application relates to the technical field of shock absorption of large-span bridge structures, and in particular, to an ultra-long self-resetting and anti-buckling bracing with strong energy dissipation.

Background technique

Supports are often used in engineering structures to increase the rigidity of the structure and reduce the displacement of the structure, thereby improving the stability of the structure. However, under the action of earthquake, the ordinary support is prone to buckling and cannot effectively play the role of shock absorption. To solve this problem, anti-buckling braces came into being. Anti-buckling bracing is a new type of bracing that has the dual functions of ordinary bracing and metal energy dissipation damper. It is widely used in the lateral force resistance system of high-rise buildings, and it also has a certain energy dissipation effect while providing strength. The composition of the anti-buckling support device mainly includes: the inner core of the steel support, the outer restraint member and the unbonded material in the middle. The cross-sectional shape of the inner core mainly includes a word plate shape, a cross plate shape, an I-shape and a hollow rectangle. Outsourced restraint members are generally made of materials such as steel, steel casing and reinforced concrete. According to the different outsourced restraint members, the buckling-restraining braces can be divided into reinforced concrete restraint restraint restraint restraints, steel-filled concrete restraint restraint restraint restraint restraints, and all-steel restraint restraint restraint restraint restraints.

The anti-buckling bracing is a high-performance, low-cost new building component with stable and reliable working performance and good energy dissipation capacity, which can provide certain additional stiffness and additional damping to the structure when an earthquake occurs. Therefore, anti-buckling bracing is more and more favored by engineers and scholars at home and abroad, and has been used in a large number of practical projects. In 1976, Kimura et al. used a support-type member for the first time to test, in order to achieve the purpose of increasing ductility, the surface of the inner core was coated with non-bonded material. After that, scholars from all over the world have done a lot of research work on the materials, properties and design methods of anti-buckling bracing members.

Some deficiencies of existing anti-buckling braces:

1. The anti-buckling bracing currently used in engineering is concentrated on the more mature research on the CFST-constrained anti-buckling bracing with a flat-shaped inner core and a cross-shaped inner core, with bearing as the main purpose and energy dissipation second. Such anti-buckling bracing is self-heavy and difficult to apply to large-span structures.

2. At present, anti-buckling braces are mostly used in building structures, and are rarely used in large-span bridges, because long-length anti-buckling braces face the problems of self-heavy, large mid-span bending moment, and mid-span deflection and mid-span bending. The increase of the bending moment will directly affect the overall stability of the anti-buckling bracing.

3. In the event of a major earthquake, the energy dissipation capacity of ordinary anti-buckling braces has an upper limit, and the displacement response of the structure will exceed the limit displacement of ordinary anti-buckling braces.

4. Ordinary anti-buckling braces have low stiffness after yielding, have no self-reset function, are prone to fracture damage, and cannot effectively prevent the growth of structural displacement.

Utility model content

The present application provides an ultra-long self-resetting and anti-buckling support with strong energy dissipation. By symmetrically arranging two yielding sections for energy dissipation on the outer sidewall of the energy dissipation inner core located in the outer sleeve, and one located in the inner sleeve The self-resetting parts inside the cylinder and fixed on both sides of the bottom plate of the energy-consuming inner core not only meet the shock absorption requirements, improve the seismic safety of the bridge under the action of strong earthquakes, but also have the self-resetting ability.

In order to achieve the above purpose, the present application provides an ultra-long high-energy-dissipating self-resetting anti-buckling support, comprising an outer sleeve, an energy-dissipating inner core, an inner sleeve and a self-resetting component sequentially coaxially sleeved from outside to inside, The outer sleeve, the energy-consuming inner core and the inner sleeve are fixedly connected by a plurality of fixing parts, and the gaps between the outer sleeve and the energy-consuming inner core, the energy-consuming inner core and the inner sleeve are all provided with an unbonded sliding plate; the energy dissipation inner core includes an anchoring section and a yield section for energy dissipation symmetrically arranged on both sides of the anchor section, and the other end of each yield section is provided with a connecting section; the Both ends of the connecting section are provided with bottom plates.

Further, a plurality of stiffening plates are integrally connected with one side of the two bottom plates close to the connecting section, and the plurality of stiffening plates are evenly distributed along the circumferential direction of the connecting section.

Further, the outer sleeve is provided with a chute matched with a plurality of stiffening plates.

Further, the outer sleeve, the energy-consuming inner core and the inner sleeve are all made of round steel pipes.

Further, the fixing member is a bolt, and the outer sleeve, the energy-dissipating inner core and the inner sleeve are all provided with holes matched with the bolts.

Further, the self-resetting component is a spring, and both ends of the spring are respectively connected to the two bottom plates.

Further, the non-bonded sliding plate is a polytetrafluoroethylene sheet.

Further, the gaps between the outer sleeve and the energy-consuming inner core and between the energy-consuming inner core and the inner sleeve are all 5 mm.

Compared with the prior art, the present application has the following beneficial effects:

(1) The anti-buckling support is symmetrically opened with two yield holes of equal length and long enough at both ends of the energy dissipation inner core to ensure that the anti-buckling support has sufficient energy dissipation capacity.

(2) The self-resetting part of the anti-buckling support adopts an annular spring, and the annular spring can control the residual displacement of the large-span bridge structure after earthquake, and reduce the post-seismic damage of the large-span bridge structure.

(3) The span of this anti-buckling bracing can be larger than that of ordinary anti-buckling bracing, which meets the application requirements of large-span bridge structures.

(4) The anti-buckling support has a simple structure and adopts an all-steel section, which is convenient for factory production and mechanized assembly, and its device quality can be effectively guaranteed.

(5) The anti-buckling support is assembled by high-strength bolts, which is convenient for disassembly and replacement after earthquake.

Description of drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that are used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

1 is a perspective view of a self-reset anti-buckling brace in Example 1;

Figure 2 is an exploded view of the self-resetting anti-buckling brace in Example 1;

3 is a schematic front view of the structure of each component of the self-reset anti-buckling support in Example 1;

FIG. 4 is a schematic cross-sectional view of the center of the anchoring section in Example 1. FIG.

In the figure, 1-outer sleeve, 2-energy dissipation inner core, 3-chute, 4-base plate, 5-stiffening plate, 6-high-strength bolt, 7-inner sleeve, 8-ring spring, 9-yield section .

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", The orientation or positional relationship indicated by "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying The device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as a limitation of the present application.

In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; for those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood in specific situations.

The terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may expressly or implicitly include one or more of that feature. In the description of this application, unless stated otherwise, "plurality" means two or more.

Referring to FIGS. 1 and 4 , the present embodiment 1 provides an ultra-long self-resetting and anti-buckling support with strong energy dissipation, including an outer sleeve 1, an energy-dissipating inner core 2, and an inner sleeve that are coaxially sleeved from outside to inside in sequence. The barrel 7 and the self-resetting member, the self-resetting member can be a member having elasticity, such as a ring spring 8 . The outer sleeve 1, the energy-consuming inner core 2 and the inner sleeve 7 are fixedly connected by a plurality of fixing parts, and the connection between the outer sleeve 1 and the energy-consuming inner core 2, the energy-consuming inner core 2 and the inner sleeve 7 is fixed. The gaps are filled with non-bonded sliding plates, the gaps between the outer sleeve 1 and the energy dissipation inner core 2, the energy dissipation inner core 2 and the inner sleeve 7 are all 5mm, and the fixing parts can be but not limited to 12.9 grade M20 High-strength bolts 6, when using high-strength bolts 6 to fix the outer sleeve 1, the energy-dissipating inner core 2, and the inner sleeve 7, the nut can be pre-fixed in the inner sleeve 7, and then one end of the high-strength bolts 6 is threaded in turn. After passing through the outer sleeve 1 and the energy-consuming inner core 2, the three are fixedly connected to ensure the reliability of the connection. The outer sleeve 1 , the energy-consuming inner core 2 and the inner sleeve 7 are all provided with through holes matched with the high-strength bolts 6 . The non-bonded sliding plate is made of PTFE sheet, which can reduce the frictional resistance of the high-energy-dissipating inner core 2 yielding deformation, ensure the normal operation of the high-energy-dissipating inner core 2, and give full play to its energy-dissipating function. . The energy dissipation inner core 2 is made of Q235 round steel pipe with lower yield point, and the outer sleeve 1 and the inner sleeve 7 are made of Q345 round steel pipe.

Referring to Figures 2 and 3, the energy dissipation inner core 2 includes an anchoring segment and a yielding segment 9 symmetrically arranged on both sides of the anchoring segment for energy dissipation, and the other end of each yielding segment 9 is provided with a connecting segment; The anchoring section and the yielding section 9 and the yielding section 9 and the connecting section are integrally connected. The yielding section 9 can ensure that the anti-buckling support has sufficient energy dissipation capacity. The ends of the two yielding sections 9 are arc transitions, and the transitions are relaxed, thereby reducing stress concentration and ensuring the continuity and stability of force transmission. The cross-sectional area of the yielding section 9 is smaller than that of the connecting section and the anchoring section. In the specific implementation, the cross-section of the yielding section 9 may be weakened by opening holes or other methods, so that the yielding section 9 will first enter into plastic deformation. When the cross section is weakened by opening the hole, the two through holes are arranged symmetrically. And by adjusting the length and cross-sectional area of the yield section 9, the energy dissipation capacity required by the structure can be provided, which fully meets the energy dissipation and shock absorption requirements of the large-span bridge structure in high-intensity areas, and improves the seismic safety of the long-span bridge structure. sex.

Referring to FIG. 1 , both ends of the energy dissipating inner core 2 are provided with bottom plates 4 , and both ends of the annular spring 8 are respectively connected to the two bottom plates 4 . A plurality of stiffening plates 5 are integrally connected to one side of the two bottom plates 4 close to the energy dissipation inner core 2 , and the multiple stiffening plates 5 are evenly distributed along the circumferential direction of the energy dissipation inner core 2 . The outer sleeve 1 is provided with a chute 3 matched with a plurality of stiffening plates 5 . The annular spring 8 ensures that it has a good elastic restoring force, is located inside the inner sleeve 7 and has both ends fixed on the bottom plate 4 on both sides of the energy dissipation inner core 2 , and can be deformed cooperatively with the energy dissipation inner core 2 . The elastic restoring force of the support can be regulated by changing the diameter of the annular spring 8, so that the residual displacement of the large-span bridge structure after the earthquake can be controlled.

The production and installation steps of this embodiment 1 are as follows:

Step 1: Fix the nut at the hole on the inner sleeve 7 by spot welding in advance.

Step 2: Insert the ring spring 8 into the inner sleeve 7, set a polytetrafluoroethylene sheet on the outer wall of the inner sleeve 7, cover the energy dissipation inner core 2, and then set the polytetrafluoroethylene on the outer wall of the energy dissipation inner core 2. The tetrafluoroethylene sheet is then covered with the outer sleeve 1 , so that the PTFE sheet fills the gap between the inner sleeve 7 and the energy dissipation inner core 2 and the energy dissipation inner core 2 and the outer sleeve 1 .

Step 3: After the nesting is completed, connect and fasten by high-strength bolts 6 at the pre-reserved holes.

Step 4: Connect and fix the ring spring 8, the energy dissipation inner core 2 and the bottom plates 4 on both sides.

Step 5: At the chute 3 of the outer sleeve 1, the stiffening plate 5 is welded and fixed to the outer wall of the energy dissipation inner core 2 and the bottom plates 4 on both sides respectively.

The working principle of this embodiment 1 is as follows: two yielding sections 9 of equal length and sufficiently long ensure that the anti-buckling support has sufficient energy dissipation capacity; the annular spring 8 is arranged inside the inner sleeve 7 and both ends are fixed to the energy dissipation On the bottom plates 4 on both sides of the inner core 2, the anti-buckling supports can realize self-reset after the earthquake. Under the action of the earthquake, the two symmetrical yield sections 9 enter plasticity to dissipate energy. After the action of the earthquake, the annular spring 8 provides a certain stiffness and elastic restoring force for the anti-buckling support, which can further reduce the residual bridge structure after the earthquake. Displacement; the non-bonded slip material arranged between the outer sleeve 1 and the energy-dissipating inner core 2, and the energy-dissipating inner core 2 and the inner sleeve 7 can reduce the frictional force of the deformation of the energy-dissipating inner core 2 and ensure the The normal operation of the core 2; the outer sleeve 1 and the inner sleeve 7 provide strong restraint for the lateral buckling of the energy-dissipating inner core 2, which improves the energy-dissipating capacity of the energy-dissipating inner core 2 to a certain extent.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any changes or substitutions within the technical scope disclosed in the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims (9)

1. An ultra-long high-energy-dissipating self-resetting anti-buckling support, characterized in that it comprises an outer sleeve, an energy-dissipating inner core, an inner sleeve and a self-resetting component that are coaxially sleeved from outside to inside, and the The outer sleeve, the energy-consuming inner core and the inner sleeve are fixedly connected by a plurality of fixing parts, and the gaps between the outer sleeve and the energy-consuming inner core, the energy-consuming inner core and the inner sleeve are all provided with non-stick or non-stick knot-slip plate; the energy dissipation inner core includes an anchoring section and a yielding section for energy dissipation symmetrically arranged on both sides of the anchoring section, and the other end of each yielding section is provided with a connecting section; the connecting section The end is provided with a bottom plate. 2. The ultra-long high-energy-dissipating self-resetting anti-buckling support according to claim 1, wherein a plurality of stiffening plates are integrally connected to one side of the two bottom plates close to the connecting section, and a plurality of stiffening plates are integrally connected. The plates are evenly distributed along the circumference of the connecting section. 3 . The super-long self-resetting anti-buckling support with strong energy dissipation according to claim 1 , wherein a through hole is opened on the outer side wall of the yielding section. 4 . 4 . The super-long high-energy-dissipation self-reset anti-buckling support according to claim 2 , wherein the outer sleeve is provided with a chute matched with a plurality of stiffening plates. 5 . 5 . The ultra-long high-energy-dissipating self-resetting anti-buckling support according to claim 1 , wherein the outer sleeve, the energy-dissipating inner core and the inner sleeve are all made of round steel pipes. 6 . 6. The ultra-long high-energy-dissipating self-resetting anti-buckling support according to claim 1, wherein the fixing member is a bolt, and the outer sleeve, the energy-dissipating inner core and the inner sleeve are all provided with There are holes to fit the bolts. 7 . The ultra-long self-resetting anti-buckling support with strong energy dissipation according to claim 1 , wherein the self-resetting component is a spring, and the two ends of the spring are respectively connected to the two bottom plates. 8 . 8 . The ultra-long high-energy dissipative self-reset anti-buckling support according to claim 1 , wherein the non-bonded sliding plate is a polytetrafluoroethylene sheet. 9 . 9 . The super-long high-energy-dissipating self-resetting anti-buckling support according to claim 1 , wherein the gap between the outer sleeve and the energy-dissipating inner core, and the energy-dissipating inner core and the inner sleeve is 9 . Both are 5mm.

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