CN216739227U - Super-long strong-energy-consumption self-resetting buckling-restrained brace - Google Patents
Super-long strong-energy-consumption self-resetting buckling-restrained brace Download PDFInfo
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- CN216739227U CN216739227U CN202220335698.2U CN202220335698U CN216739227U CN 216739227 U CN216739227 U CN 216739227U CN 202220335698 U CN202220335698 U CN 202220335698U CN 216739227 U CN216739227 U CN 216739227U
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Abstract
The application discloses super-long type energy-intensive self-resetting buckling-restrained brace relates to large-span bridge structure shock attenuation technical field. The buckling restrained brace comprises an outer sleeve, an energy-consuming inner core, an inner sleeve and a self-resetting part which are coaxially sleeved from outside to inside in sequence, the outer sleeve, the energy-consuming inner core and the inner sleeve are fixedly connected through a plurality of fixing pieces, and unbonded sliding plates are arranged in gaps among the outer sleeve, the energy-consuming inner core and the inner sleeve; the energy-consuming inner core comprises an anchoring section and yielding sections which are symmetrically arranged on two sides of the anchoring section and used for consuming energy, the other end of each yielding section is provided with a connecting section, and two end parts of the energy-consuming inner core are provided with bottom plates. The application is used for improving the seismic safety and post-seismic recoverability of the large-span bridge under the action of strong earthquake.
Description
Technical Field
The application relates to the technical field of large-span bridge structure shock absorption, in particular to an ultra-long type strong energy consumption self-resetting buckling restrained brace.
Background
Supports are often used in engineering structures to increase the stiffness of the structure, reduce the displacement of the structure, and thereby improve the stability of the structure. But the common support is easy to bend under the action of earthquake, and cannot effectively play a role in shock absorption. To solve this problem, the buckling restrained brace comes along. The buckling restrained brace is a novel brace which has double functions of a common brace and a metal energy dissipation damper. The composite material is widely applied to a lateral force resisting system of a high-rise building, and has certain energy consumption effect while providing strength. The anti-buckling supporting device mainly comprises: the steel support inner core, the outer wrapping constraint component and the middle non-adhesive material. The cross section of the inner core is mainly in a shape of a straight plate, a cross plate, an I-shaped, a hollow rectangle and the like. The outer-wrapped restraining member is generally made of steel, steel sleeves, reinforced concrete and other materials. The buckling restrained brace can be divided into a reinforced concrete restrained buckling restrained brace, a steel pipe concrete restrained buckling restrained brace and an all-steel restrained buckling restrained brace according to the difference of the outer-wrapped restraining members.
The buckling restrained brace is a novel building component with high performance and low cost, has stable and reliable working performance and good energy consumption capability, and can provide certain additional rigidity and additional damping for a structure when an earthquake occurs. Therefore, the buckling restrained brace is more and more favored by engineering technicians and scholars at home and abroad, and is already applied to a large number of practical projects. In 1976 Kimura et al, which used a support-type member for the first time, applied unbonded material to the surface of the core for the purpose of increasing ductility. After that, various researchers in the world have made a lot of research on materials, properties, design methods, and the like of the buckling restrained brace member.
The existing buckling restrained brace has the following defects:
1. at present, the buckling restrained brace applied to engineering is focused on a concrete filled steel tube restrained buckling restrained brace with a relatively mature linear plate-shaped inner core and a relatively mature cross plate-shaped inner core, and has the main purpose of bearing and the secondary energy dissipation. The buckling restrained brace is heavy in self weight and difficult to apply to a large-span structure.
2. At present, the buckling restrained brace is mostly applied to building structures and is rarely applied to large-span bridges, because the buckling restrained brace with longer length faces the problems of large dead weight and large mid-span bending moment, and the overall stability of the buckling restrained brace can be directly influenced by mid-span down-warping and mid-span bending moment increase.
3. When the earthquake occurs, the energy consumption capacity of the common buckling-restrained brace has an upper limit, and the displacement response of the structure can exceed the limit displacement of the common buckling-restrained brace.
4. The common buckling-restrained brace has small rigidity after yielding, does not have a self-resetting function, is easy to break and damage, and cannot effectively prevent the increase of the structural displacement.
SUMMERY OF THE UTILITY MODEL
The utility model provides an overlength type energy consumption is from restoring to throne buckling restrained brace by force sets up two yielding sections that are used for the power consumption through the symmetry on the lateral wall that the power consumption inner core is located the outer sleeve to and one is located the inside and both ends of inner sleeve and is fixed in the self-reset part on the power consumption inner core both sides bottom plate, both satisfied the shock attenuation demand, improve the anti-seismic security of bridge under the strong earthquake effect, still have from the ability of restoring to throne.
In order to achieve the purpose, the application provides an ultra-long type strong energy consumption self-resetting buckling restrained brace which comprises an outer sleeve, an energy consumption inner core, an inner sleeve and a self-resetting component, wherein the outer sleeve, the energy consumption inner core, and the inner sleeve are sequentially and coaxially sleeved from outside to inside; the energy-consuming inner core comprises an anchoring section and yielding sections which are symmetrically arranged on two sides of the anchoring section and used for consuming energy, and the other end of each yielding section is provided with a connecting section; and bottom plates are arranged at two end parts of the connecting section.
Furthermore, one side of each of the two bottom plates, which is close to the connecting section, is uniformly connected with a plurality of stiffening plates, and the plurality of stiffening plates are uniformly distributed along the circumferential direction of the connecting section.
Furthermore, the outer sleeve is provided with a sliding groove matched with the stiffening plates.
Furthermore, the outer sleeve, the energy-consuming inner core and the inner sleeve are all made of circular steel tubes.
Further, the mounting is the bolt, outer sleeve, power consumption inner core and inner skleeve all seted up with bolt matched with hole.
Furthermore, the self-resetting part is a spring, and two ends of the spring are respectively connected to the two bottom plates.
Further, the unbonded sliding plate is a polytetrafluoroethylene thin plate.
Further, the gaps between the outer sleeve and the energy consumption inner core and between the energy consumption inner core and the inner sleeve are all 5 mm.
Compared with the prior art, the application has the following beneficial effects:
(1) two yielding holes which are equal in length and long enough are symmetrically formed in the two ends of the energy-consumption inner core of the buckling-restrained brace, so that the buckling-restrained brace is guaranteed to have enough energy-consumption capacity.
(2) The self-resetting component of the buckling-restrained brace adopts the annular spring, and the annular spring enables the residual displacement of the large-span bridge structure after the earthquake to be controlled, so that the damage of the large-span bridge structure after the earthquake is reduced.
(3) Compared with the common buckling restrained brace, the buckling restrained brace has the advantages that the span can be larger, and the application requirements of a large-span bridge structure are met.
(4) The buckling restrained brace is simple in structure, adopts an all-steel section, is convenient for industrial production and mechanical assembly, and can effectively guarantee the quality of the device.
(5) The buckling restrained brace is assembled through high-strength bolts, and is convenient to disassemble and replace after an earthquake.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a perspective view of a self-resetting buckling restrained brace in example 1;
fig. 2 is an exploded view of the self-resetting buckling restrained brace of example 1;
FIG. 3 is a schematic front view of the structure of each component of the self-resetting buckling restrained brace of embodiment 1;
fig. 4 is a schematic center sectional view of the anchoring section in embodiment 1.
In the figure, 1-outer sleeve, 2-energy dissipation inner core, 3-chute, 4-bottom plate, 5-stiffening plate, 6-high strength bolt, 7-inner sleeve, 8-annular spring and 9-yield section.
Detailed Description
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, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; the specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to 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 explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
Referring to fig. 1 and 4, this embodiment 1 provides an ultra-long type energy-intensive self-resetting buckling restrained brace, which includes an outer sleeve 1, an energy-consuming inner core 2, an inner sleeve 7, and a self-resetting component, which may be a component having elasticity, such as an annular spring 8, coaxially sleeved in sequence from outside to inside. Outer sleeve 1, through a plurality of mounting fixed connection between power consumption inner core 2 and the inner skleeve 7, and outer sleeve 1 and power consumption inner core 2, all fill in the clearance between power consumption inner core 2 and the inner skleeve 7 has the unbonded slide sliding plate, outer sleeve 1 and power consumption inner core 2, the clearance between power consumption inner core 2 and the inner skleeve 7 is 5mm, the mounting can be but not limited to 12.9 level M20 high strength bolt 6, when adopting the fixed outer sleeve 1 of high strength bolt 6, power consumption inner core 2, during the inner skleeve 7, can fix the nut in advance in the inner skleeve 7, pass outer sleeve 1 in proper order with the one end of high strength bolt 6 again, with three fixed connection behind the power consumption inner core 2, guarantee the reliability of connecting. 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 bolt 6. The unbonded sliding plate is made of a polytetrafluoroethylene thin plate, the polytetrafluoroethylene thin plate can reduce the frictional resistance of the yield deformation of the energy-consuming inner core 2, the normal work of the energy-consuming inner core 2 is guaranteed, and the energy-consuming effect of the energy-consuming inner core is fully exerted. The energy consumption inner core 2 adopts Q235 round steel pipes with lower yield points, and the outer sleeve 1 and the inner sleeve 7 both adopt Q345 round steel pipes.
Referring to fig. 2 and 3, the energy-consuming inner core 2 comprises an anchoring section and yielding sections 9 symmetrically arranged on two sides of the anchoring section and used for consuming energy, and a connecting section is arranged at the other end of each yielding section 9; the adjacent anchoring section and the yield section 9, and the yield section 9 and the connecting section are integrally connected. The yielding segment 9 can ensure that the buckling restrained brace has enough energy consumption capability. The ends of the two yielding sections 9 are in arc transition, and the transition is mild, so that the stress concentration is reduced, and the continuity and the stability of force transmission are ensured. The cross-sectional area of the yielding segment 9 is smaller than that of the connecting segment and the anchoring segment, and when the concrete implementation is carried out, the cross section of the yielding segment 9 can be weakened by adopting a through hole or other modes, so that the yielding segment 9 enters plastic deformation first. When the mode of opening the through hole is selected to weaken the cross section, the two through holes are symmetrically arranged. And the energy consumption capacity required by the structure can be provided by adjusting the length and the section area of the yield section 9, the energy consumption and shock absorption requirements of the large-span bridge structure in high-intensity areas are fully met, and the anti-seismic safety of the large-span bridge structure is improved.
Referring to fig. 1, the two end portions of the energy-consuming inner core 2 are respectively provided with a bottom plate 4, and the two ends of the annular spring 8 are respectively connected with the two bottom plates 4. One side of each of the two bottom plates 4 close to the energy-consuming inner core 2 is integrally connected with a plurality of stiffening plates 5, and the plurality of stiffening plates 5 are uniformly distributed along the circumferential direction of the energy-consuming inner core 2. The outer sleeve 1 is provided with a sliding groove 3 matched with the plurality of stiffening plates 5. The annular spring 8 ensures that the annular spring has good elastic restoring force, is positioned in the inner sleeve 7, has two ends fixed on the bottom plates 4 at two sides of the energy consumption inner core 2, and can deform in cooperation with the energy consumption inner core 2. The elastic restoring force of the support can be regulated and controlled by changing the diameter of the annular spring 8, so that the residual displacement of the large-span bridge structure after the earthquake is controlled.
The manufacturing and installation steps of this example 1 are as follows:
step 1: the nut is fixed in advance by spot welding at the hole in the inner sleeve 7.
Step 2: an annular spring 8 penetrates into the inner sleeve 7, a polytetrafluoroethylene thin plate is arranged on the outer wall of the inner sleeve 7, the energy-consuming inner core 2 is sleeved on the inner sleeve, the polytetrafluoroethylene thin plate is arranged on the outer wall of the energy-consuming inner core 2, and then the outer sleeve 1 is sleeved on the inner sleeve, so that the polytetrafluoroethylene thin plate is filled in gaps between the inner sleeve 7 and the energy-consuming inner core 2 and between the energy-consuming inner core 2 and the outer sleeve 1.
And step 3: after the nesting is finished, the holes reserved in advance are connected and fastened through high-strength bolts 6.
And 4, step 4: the annular spring 8, the energy-consuming inner core 2 and the bottom plates 4 on the two sides are connected and fixed.
And 5: and at the sliding chute 3 of the outer sleeve 1, the stiffening plate 5 is respectively welded and fixed with the outer wall of the energy-consuming inner core 2 and the bottom plates 4 at the two sides.
The working principle of the embodiment 1 is as follows: the two yield sections 9 with equal length and long enough ensure that the buckling restrained brace has enough energy consumption capacity; the annular spring 8 is arranged in the inner sleeve 7, two ends of the annular spring are fixed on the bottom plates 4 on two sides of the energy-consumption inner core 2, and the buckling-restrained brace can realize self-resetting after earthquake action. Under the action of an earthquake, the two symmetrical yield sections 9 enter plasticity to consume energy, and after the earthquake, the annular spring 8 provides certain rigidity and elastic restoring force for the anti-buckling support, so that the residual displacement of the bridge structure after the earthquake can be further reduced; the unbonded sliding material arranged between the outer sleeve 1 and the energy-consuming inner core 2 and between the energy-consuming inner core 2 and the inner sleeve 7 can reduce the deformation friction of the energy-consuming inner core 2 and ensure the normal work of the energy-consuming inner core 2; the outer sleeve 1 and the inner sleeve 7 provide strong restraint for lateral buckling of the energy-consuming inner core 2, and the energy-consuming capacity of the energy-consuming inner core 2 is improved to a certain extent.
The above is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (9)
1. The super-long strong energy-consumption self-resetting buckling-restrained brace is characterized by comprising an outer sleeve, an energy-consumption inner core, an inner sleeve and a self-resetting component which are coaxially sleeved from outside to inside in sequence, wherein the outer sleeve, the energy-consumption inner core and the inner sleeve are fixedly connected through a plurality of fixing pieces, and unbonded sliding plates are arranged in gaps among the outer sleeve, the energy-consumption inner core and the inner sleeve; the energy-consuming inner core comprises an anchoring section and yielding sections which are symmetrically arranged on two sides of the anchoring section and used for consuming energy, and the other end of each yielding section is provided with a connecting section; the end of the connecting section is provided with a bottom plate.
2. The ultra-long type high-energy-consumption self-resetting buckling-restrained brace as claimed in claim 1, wherein a plurality of stiffening plates are integrally connected to one side of each of the two base plates close to the connecting section, and are uniformly distributed along the circumferential direction of the connecting section.
3. The ultra-long type energy-intensive self-resetting buckling-restrained brace as claimed in claim 1, wherein a through hole is formed in an outer side wall of the yielding section.
4. The ultra-long type strong energy consumption self-resetting buckling restrained brace as claimed in claim 2, wherein the outer sleeve is provided with a sliding groove matched with the plurality of stiffening plates.
5. The ultra-long type high-energy-consumption self-resetting buckling restrained brace as claimed in claim 1, wherein the outer sleeve, the energy-consumption inner core and the inner sleeve are all made of circular steel tubes.
6. The ultra-long type high energy consumption self-resetting buckling restrained brace as claimed in claim 1, wherein the fixing member is a bolt, and the outer sleeve, the energy consumption inner core and the inner sleeve are all provided with holes matched with the bolt.
7. The ultra-long type energy-intensive self-resetting buckling restrained brace as claimed in claim 1, wherein the self-resetting component is a spring, and two ends of the spring are respectively connected to the two bottom plates.
8. The ultra-long high-energy-consumption self-resetting buckling-restrained brace as claimed in claim 1, wherein the unbonded sliding plate is a thin polytetrafluoroethylene plate.
9. The ultra-long type high-energy-consumption self-resetting buckling restrained brace as claimed in claim 1, wherein gaps between the outer sleeve and the energy-consumption inner core and between the energy-consumption inner core and the inner sleeve are all 5 mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220335698.2U CN216739227U (en) | 2022-02-18 | 2022-02-18 | Super-long strong-energy-consumption self-resetting buckling-restrained brace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220335698.2U CN216739227U (en) | 2022-02-18 | 2022-02-18 | Super-long strong-energy-consumption self-resetting buckling-restrained brace |
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| CN216739227U true CN216739227U (en) | 2022-06-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117167201A (en) * | 2023-09-06 | 2023-12-05 | 重庆大学 | Hybrid wind power tower system and self-resetting energy dissipation supporting device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117167201A (en) * | 2023-09-06 | 2023-12-05 | 重庆大学 | Hybrid wind power tower system and self-resetting energy dissipation supporting device |
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