A repairable buckling-restrained energy dissipation bracing device

Abstract

The present invention relates to the technical field of civil engineering structures, and more specifically, to a repairable buckling-restrained energy dissipation bracing device. The bracing device includes an external restraint system and a core energy dissipation steel plate, and the external restraint system forms a cavity structure that prevents the core energy dissipation steel plate from buckling and mounts the core energy dissipation steel plate. By providing the cavity structure formed by the external restraint system that prevents the core energy dissipation steel plate from buckling and mounts the core energy dissipation steel plate, the present invention can prevent the core energy dissipation steel plate from buckling in all directions, forming a complete buckling-restrained energy dissipation bracing device. At the same time, the proposed repairable buckling-restrained energy dissipation bracing structure of the present invention is simple in form, stable in mechanical properties, and the core energy dissipation steel plate can be conveniently disassembled and replaced after being stressed and yielding, so as to realize the repair of the buckling-restrained bracing, and has good popularization prospects.

Description

Technical Field

[0001] The present invention relates to the technical field of civil engineering structures, and more specifically, to a repairable buckling-restrained energy dissipation bracing device. Background Art

[0002] Natural disasters such as earthquakes are unpredictable and have strong destructive power. China is a country with frequent earthquakes, causing huge economic losses and casualties every year. Improving the ability of buildings and structures to resist natural disasters such as earthquakes and strong winds is one of the important research directions in the field of civil engineering. The use of energy dissipation damping elements to dissipate the energy input into the structure from the outside has been increasingly widely applied in aspects such as structural disaster prevention and mitigation. Buckling-restrained braces are energy dissipation and vibration reduction elements widely used in structures such as buildings and bridges. Under medium and small earthquakes, the buckling-restrained braces can provide additional stiffness to the structure and reduce the deformation of the structure; under large earthquakes, the energy dissipation elements in the buckling-restrained braces work to dissipate the energy input into the structure by the earthquake, showing good hysteretic energy dissipation performance and meeting the seismic requirements of building structures.

[0003] At present, the buckling-restrained braces used in the fields of buildings and bridges have large structural sizes and high costs. After the structure suffers a large earthquake, the buckling-restrained braces are basically damaged and need to be replaced, resulting in a large loss of manpower, material resources and financial resources. Moreover, the complex repair procedures and long repair cycles seriously affect the reuse of building structures. Therefore, designing a new type of buckling-restrained brace to achieve the post-earthquake repairability of the buckling-restrained brace, reduce the repair cycle and economic losses has become an increasingly prominent problem. In view of the above problems, the present invention proposes a repairable buckling-restrained energy dissipation bracing. Summary of the Invention

[0004] In order to overcome the above problems, the present invention provides a repairable buckling-restrained energy dissipation bracing device.

[0005] In the present technical solution, a repairable buckling-restrained energy dissipation bracing device is provided. The bracing device includes an external restraint system and a core energy dissipation steel plate, and the external restraint system forms a cavity structure for preventing the core energy dissipation steel plate from buckling and installing the core energy dissipation steel plate.

[0006] Through the setting of the cavity structure formed by the external restraint system of the present invention for preventing the core energy dissipation steel plate from buckling and installing the core energy dissipation steel plate, the core energy dissipation steel plate can be prevented from buckling in all directions, forming a complete buckling-restrained energy dissipation bracing device. At the same time, the repairable buckling-restrained energy dissipation bracing structure proposed by the present invention has a simple form and stable mechanical properties. After the core energy dissipation steel plate is stressed and yields and fails, it can be conveniently disassembled and replaced, so as to realize the repair of the buckling-restrained brace, and has good popularization.

[0007] Preferably, the external restraint system includes two lateral restraint plates, a plurality of filling plates, and two end connecting plates. The two lateral restraint plates are arranged on the upper and lower sides of the core energy-dissipating steel plate. The plurality of filling plates are arranged between the two lateral restraint plates and on the opposite sides of the core energy-dissipating steel plate. The two end connecting plates are arranged between the two lateral restraint plates and on the other opposite sides of the core energy-dissipating steel plate. Such an arrangement is to reliably fix the core energy-dissipating steel plate, thereby fixing the core energy-dissipating steel plate from all directions of up, down, left, right, front, and back to prevent it from buckling. Specifically: The lateral restraint plates are arranged on the upper and lower sides of the core energy-dissipating steel plate, aiming to prevent the core energy-dissipating steel plate from buckling out of plane; in addition, filling plates are provided on the left and right sides of the core energy-dissipating steel plate, and the main function is to limit the lateral buckling of the repairable energy-dissipating steel plate and play a role in position limiting. The two end connecting plates are arranged between the two lateral restraint plates and on the other opposite sides of the core energy-dissipating steel plate, and the main function is to transfer loads. Of course, it should be noted that the setting of the number of the two lateral restraint plates and the two connecting plates is only a preference, not a restrictive regulation. Other numbers are also feasible as long as the corresponding functions can be completed.

[0008] Preferably, the cavity structure is formed by two lateral restraint plates, a plurality of filling plates, and two end connecting plates. Such an arrangement is to form an all-round fixation of the core energy-dissipating steel plate to prevent it from buckling from all directions of up, down, left, right, front, and back, forming a form of protective cover, which greatly improves the effect of preventing buckling.

[0009] Preferably, the external restraint system is also provided with a connecting plate, and the end connecting plate and the core energy-dissipating steel plate are fixedly connected through the connecting plate. The setting of the connecting plate is to transfer the external load to the core energy-dissipating steel plate and connect the core energy-dissipating steel plate and the end connecting plate into a whole. Preferably, the connecting plate is arranged at the connecting part of the core energy-dissipating steel plate and the end connecting plate.

[0010] Preferably, notches are provided on both sides of the lateral restraint plate, and the connecting plate is installed at the notch position. Such an arrangement is to facilitate the installation of the connecting plate and the transfer of acting forces.

[0011] Preferably, the connecting plate is arranged at the connecting part of the end connecting plate and the core energy-dissipating steel plate, and the connecting plate fixedly connects the end connecting plate and the core energy-dissipating steel plate through a first fixing structure. Such an arrangement is to effectively transfer the external load to the core energy-dissipating steel plate and reliably connect the core energy-dissipating steel plate and the end connecting plate into a whole through the first fixing structure.

[0012] Preferably, the two lateral restraint plates and the plurality of filling plates are fixedly connected through a second fixing structure. Such an arrangement can reliably fix the plurality of filling plates to the two lateral restraint plates.

[0013] Preferably, there is a non - fitting gap between the end connecting plate and the core energy - dissipating steel plate, there is also a non - fitting gap between the core energy - dissipating steel plate and the lateral restraint plates on the upper and lower sides, and there is a non - fitting gap between the core energy - dissipating steel plate and several filling plates. The setting of the gap is to leave a buffer space or facilitate mutual installation and cooperation.

[0014] Preferably, reserved holes are provided at the corners of the lateral restraint plates corresponding to the end connecting plates. The setting of the reserved holes is for inserting steel bars into the reserved holes during the maintenance of the buckling - restrained brace after an earthquake, facilitating the maintenance work.

[0015] Preferably, the core energy - dissipating steel plate is made of low - yield - point steel.

[0016] Compared with the prior art, the beneficial effects are as follows:

[0017] In the present invention, through the external restraint system, a cavity structure for preventing the buckling of the core energy - dissipating steel plate and installing the core energy - dissipating steel plate is formed, which can prevent the buckling of the core energy - dissipating steel plate in all directions, forming a complete buckling - restrained energy - dissipating support device. And the structure form of the present invention is simple. The buckling - restrained energy - dissipating support is composed of an external restraint system and a core energy - dissipating steel plate. The core energy - dissipating steel plate is placed inside the external restraint system, forming a complete buckling - restrained energy - dissipating support system. At the same time, the proposed repairable buckling - restrained energy - dissipating support structure of the present invention has a simple structure form and stable mechanical properties. After the core energy - dissipating steel plate is stressed and yields and fails, it can be conveniently disassembled and replaced, thereby realizing the maintenance of the buckling - restrained brace, and having good popularization. Compared with the traditional buckling - restrained brace, the repairable buckling - restrained energy - dissipating support not only has good mechanical and energy - dissipating properties, but also is set in a repairable structure form. After an earthquake, only the damaged core energy - dissipating steel plate needs to be replaced to achieve the rapid repair of the buckling - restrained energy - dissipating support, reducing economic losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. is an overall structural layout schematic diagram of a repairable buckling - restrained energy - dissipating support device.

[0019] Figure 2 FIG. is a plane layout schematic diagram of a repairable buckling - restrained energy - dissipating support device with lateral restraint plates.

[0020] Figure 3 FIG. is a plane layout schematic diagram of a repairable buckling - restrained energy - dissipating support device without the upper lateral restraint plate.

[0021] Figure 4 FIG. is a plane layout schematic diagram of the core energy - dissipating steel plate in a repairable buckling - restrained energy - dissipating support device.

[0022] Figure 5 For Figure 3Schematic diagram of the A-A cross-section in the middle

[0023] Figure 6 It is a schematic diagram of the connection structure between the core energy-dissipating steel plate and the end connection plate in a repairable buckling-resistant energy-dissipating bracing device

[0024] Description of the accompanying drawings of the specification: 1 - External restraint system, 12 - Core energy-dissipating steel plate, 11 - Cavity structure, 12 - Lateral restraint plate, 13 - Filling plate, 15 - Connection plate, 14 - End connection plate, 2 - Core energy-dissipating steel plate, 3 - Bolt, 121 - Notch Detailed implementation manners

[0025] The accompanying drawings are only for illustrative purposes and should not be construed as a limitation of this patent; for better illustration of this embodiment, some components in the accompanying drawings will be omitted, enlarged or reduced, which do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted. The positional relationships described in the accompanying drawings are only for illustrative purposes and should not be construed as a limitation of this patent

[0026] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "long", "short", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the accompanying drawings are only for illustrative purposes and should not be construed as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances

[0027] The technical solutions of the present invention will be further specifically described below through specific embodiments and in conjunction with the accompanying drawings

[0028] Embodiment

[0029] As Figures 1 to 6 This is an embodiment of a repairable buckling-resistant energy-dissipating bracing device of the present invention. The bracing device includes an external restraint system 1 and a core energy-dissipating steel plate 2. The external restraint system 1 forms a cavity structure 11 that prevents the core energy-dissipating steel plate 2 from buckling and mounts the core energy-dissipating steel plate 2

[0030] Among them, the external constraint system 1 includes two lateral constraint plates 12, several filling plates 13 and two end connection plates 14. The two lateral constraint plates 12 are arranged on the upper and lower sides of the core energy dissipation steel plate 2. Several filling plates 13 are arranged between the two lateral constraint plates 12 and on the opposite sides of the core energy dissipation steel plate 2. The two end connection plates 14 are arranged between the two lateral constraint plates 12 and on the other opposite sides of the core energy dissipation steel plate 2. This setting is to reliably fix the core energy dissipation steel plate, so as to fix the core energy dissipation steel plate from all directions of up, down, left, right, front and back, and prevent it from buckling. Specifically: the lateral constraint plates are arranged on the upper and lower sides of the core energy dissipation steel plate, aiming to prevent the core energy dissipation steel plate from buckling out of plane; in addition, filling plates are provided on the left and right sides of the core energy dissipation steel plate, and the main function is to limit the lateral buckling of the repairable energy dissipation steel plate and play a role of position limitation. The two end connection plates are arranged between the two lateral constraint plates and on the other opposite sides of the core energy dissipation steel plate, and the main function is to transfer the load. Of course, it should be noted that the setting of the number of these two lateral constraint plates and two connection plates is only a preference, not a restrictive regulation. Other numbers are also feasible as long as they can complete the corresponding functions.

[0031] In addition, the cavity structure 11 is formed by two lateral constraint plates 12, several filling plates 13 and two end connection plates 14. This setting is to form an all-round fixation of the core energy dissipation steel plate, prevent it from buckling from all directions of up, down, left, right, front and back, and form a form of protective cover, greatly improving the effect of preventing buckling.

[0032] Among them, the external constraint system 1 is also provided with a connection plate 15, and the end connection plate 14 and the core energy dissipation steel plate 2 are fixedly connected through the connection plate 15. The setting of the connection plate is to transfer the external load to the core energy dissipation steel plate and connect the core energy dissipation steel plate and the end connection plate into a whole. Preferably, the connection plate is arranged at the connection part of the core energy dissipation steel plate and the end connection plate.

[0033] In addition, notches 121 are provided on both sides of the lateral constraint plate 12, and the connection plate 15 is installed at the position of the notch 121.

[0034] Among them, the connection plate 15 is arranged at the connection part of the end connection plate 14 and the core energy dissipation steel plate 2, and the connection plate 15 fixedly connects the end connection plate 14 and the core energy dissipation steel plate 2 through the first fixing structure. This setting is to effectively transfer the external load to the core energy dissipation steel plate, play a role in restraining the buckling of the end of the core energy dissipation steel plate, and reliably connect the core energy dissipation steel plate and the end connection plate into a whole through the first fixing structure.

[0035] In addition, the two lateral restraint plates 12 and several filling plates 13 are fixedly connected through a second fixing structure. This arrangement can reliably fix the several filling plates to the two lateral restraint plates.

[0036] Among them, there is a non - fitting gap between the end connection plate 14 and the core energy - dissipating steel plate 2, there is also a non - fitting gap between the core energy - dissipating steel plate 2 and the upper and lower lateral restraint plates 12, and there is also a non - fitting gap between the core energy - dissipating steel plate 2 and the several filling plates 13. The setting of the gap is to leave a buffer space or facilitate mutual installation and cooperation.

[0037] In addition, reserved holes 122 are provided at the four corners of the lateral restraint plate 12 corresponding to the end connection plate 4. The reserved holes are provided for inserting steel bars into the reserved holes during the maintenance of the buckling - restrained brace after an earthquake, which is convenient for maintenance work.

[0038] Among them, the lateral restraint plates 12, several filling plates 13, end connection plates 14 and connection plates 15 are all made of high - strength steel, the core energy - dissipating steel plate 2 is made of low - yield - point steel, and the thickness of the connection plate 15 is greater than the thicknesses of the lateral restraint plates 12, several filling plates 13 and end connection plates 14. The core energy - dissipating steel plate is made of low - yield - point steel with low strength and good hysteretic performance. The lateral restraint plates, filling plates, connection plates and end connection plates are made of high - strength steel, which can ensure no yielding during use. The connection plate has a relatively large cross - sectional thickness to avoid local failure of the buckling - restrained brace due to insufficient stiffness during use.

[0039] In addition, both the first fixing structure and the second fixing structure are bolts 3. It should be noted that the bolt 3 is not a restrictive choice, but only a preference, and other detachable fixing structures are also feasible. The bolt 3 is a friction - type high - strength bolt.

[0040] Specifically:

[0041] The lateral restraint plates 12 are arranged on the upper and lower sides of the core energy-dissipating steel plate 2 to prevent the core energy-dissipating steel plate 2 from buckling out of plane. In addition, filling plates 13 are provided on the left and right sides of the core energy-dissipating steel plate 2, whose main function is to limit the lateral buckling of the core energy-dissipating steel plate 2 and play a role in position-limiting. The filling plates are arranged in a three-section manner with two holes reserved. Its function is to knock out the core energy-dissipating steel plate from the side when disassembling the core energy-dissipating steel plate, without having to remove the lateral restraint plates. A gap of about 1 mm is reserved between the core energy-dissipating steel plate 2 and the lateral restraint plates 12 and the filling plates 13. The end connection plates 14 are located at both ends of the core energy-dissipating steel plate 2 in the longitudinal direction. One end of it is connected to the external structure, mainly playing the role of transmitting external loads; the other end is connected to the core energy-dissipating steel plate 2 by bolts 3 through the connection plates 15. In addition, anti-buckling wing plates can be provided on the end connection plates 14 to enhance the stability of the connection plates and prevent the connection plates from buckling under the action of loads. A gap of about 1 mm is reserved at the connection part between the core energy-dissipating steel plate 2 and the end connection plates 14; the connection plates 14 are arranged on the upper and lower sides of the connection part between the core energy-dissipating steel plate 2 and the end connection plates 14, whose function is to transmit external loads to the core energy-dissipating steel plate 2, and play a role in restraining the end buckling of the core energy-dissipating steel plate 2, and connecting the core energy-dissipating steel plate 2 and the end connection plates 14 into a whole. The bolts 3 connect the various components to form a complete repairable anti-buckling energy-dissipating bracing system, which jointly coordinates the force.

[0042] The core energy-dissipating steel plate 2 is made of steel with low strength and good hysteretic performance.

[0043] The lateral restraint plates 12, the filling plates 13, the connection plates 15 and the end connection plates 14 are made of high-strength steel to ensure that they do not yield during use.

[0044] The connection plates 15 adopt a relatively large cross-sectional thickness to avoid local damage of the anti-buckling bracing caused by insufficient stiffness of the connection plates during use.

[0045] Reserved holes 122 are provided at the four corners of the lateral restraint plates 12 and at the corresponding positions of the connection parts of the end connection plates 14. Its function is that when repairing the anti-buckling bracing after an earthquake, steel bars are inserted into the reserved holes for maintenance work.

[0046] The specific repair steps are as follows: 1. After the earthquake, insert the steel bar into the reserved hole in the lateral restraint plate, loosen the bolts, and remove one side of the filling plate; 2. Remove the damaged core energy-dissipating steel plate 2 and replace it with a brand-new core energy-dissipating steel plate; 3. Install the filling plate, tighten the bolts at each part, and remove the steel bar, then the rapid repair of the anti-buckling energy-dissipating bracing can be completed. It can be seen that the repair process of the repairable anti-buckling energy-dissipating bracing is very simple and rapid repair can be achieved.

[0047] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation manners here. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A repairable buckling-restrained energy dissipation bracing device, characterized in that The support device includes an external restraint system (1) and a core energy-dissipating steel plate (2). The external restraint system (1) forms a cavity structure (11) that prevents the core energy-dissipating steel plate (2) from buckling and mounts the core energy-dissipating steel plate (2). The external restraint system (1) includes two lateral restraint plates (12), a plurality of filling plates (13), and two end connection plates (14). The two lateral restraint plates (12) are arranged on the upper and lower sides of the core energy-dissipating steel plate (2). A plurality of filling plates (13) are arranged between the two lateral restraint plates (12) and on the opposite sides of the core energy-dissipating steel plate (2). The two end connection plates (14) are arranged between the two lateral restraint plates (12) and on the other opposite sides of the core energy-dissipating steel plate (2). The external restraint system (1) is further provided with a connection plate (15). The end connection plate (14) and the core energy-dissipating steel plate (2) are fixedly connected through the connection plate (15). Notches (121) are provided on both sides of the lateral restraint plate (12). The connection plate (15) is installed at the position of the notch (121). The connection plate (15) is arranged at the connection part of the end connection plate (14) and the core energy-dissipating steel plate (2). The connection plate (15) fixedly connects the end connection plate (14) and the core energy-dissipating steel plate (2) through a first fixing structure. The two lateral restraint plates (12) and the plurality of filling plates (13) are fixedly connected through a second fixing structure.

2. The repairable buckling-restrained energy dissipation bracing device according to claim 1, wherein The cavity structure (11) is formed by surrounding two lateral restraint plates (12), a plurality of filling plates (13), and two end connection plates (14).

3. The repairable buckling-restrained energy dissipation bracing device according to claim 1, wherein, A gap is provided between the end connection plate (14) and the core energy-dissipating steel plate (2) without being in contact. A gap is also provided between the core energy-dissipating steel plate (2) and the upper and lower lateral restraint plates (12) without being in contact. A gap is also provided between the core energy-dissipating steel plate (2) and the plurality of filling plates (13) without being in contact.

4. The repairable buckling-restrained energy dissipation bracing device according to claim 1, wherein Reserved holes (122) are provided at the corners of the lateral restraint plate (12) corresponding to the end connection plate (4).

5. The repairable buckling-restrained energy dissipation bracing device according to any one of claims 1 to 4, characterized in that, The core energy-dissipating steel plate (2) is made of low yield point steel.

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