A detachable fan-shaped damper based on stable buckling energy dissipation and construction method

Abstract

This invention discloses a detachable sector-shaped damper based on stable buckling energy dissipation and its construction method. It includes a connecting unit, a buckling energy dissipation unit, and a buckling restraint unit. The buckling energy dissipation unit is perpendicularly connected to the connecting unit. The connecting unit has connection holes for assembly with building structural components. The buckling energy dissipation unit is annular and sector-shaped, with a weakened midsection design. The buckling restraint unit is located around the buckling energy dissipation unit and has a limited gap between it and the buckling energy dissipation unit. This invention achieves rapid assembly with structural nodes through end plate connection holes, and is easy to disassemble and replace after an earthquake. Furthermore, the buckling energy dissipation unit can undergo stable multi-wave buckling deformation under the constraint of the buckling restraint unit, exhibiting strong energy dissipation capacity and stable performance, achieving multi-level seismic resistance goals. Simultaneously, this damper has a simple structure and clearly defined stress distribution, making it suitable for prefabricated steel structures and other building systems.

Description

Technical Field

[0001] This invention relates to the field of building engineering technology, specifically to a detachable sector damper based on stable buckling energy dissipation and its construction method. Background Technology

[0002] Currently, most areas are located in high-intensity seismic zones, where building structures are prone to damage and failure at critical stress-transmitting points such as beam-column joints under earthquake loads. Joint areas, due to their complex stress distribution and significant stress concentration, often become weak points in the structure's seismic resistance. Traditional seismic resistance methods relying on the plastic energy dissipation of the main structure itself can easily lead to irreversible damage to the main components, resulting in difficult post-earthquake repairs and substantial economic losses.

[0003] Currently, common dampers used in engineering mainly include friction dampers, mild steel yield dampers, and viscous dampers, but existing technologies still have the following problems: (1) Most dampers have complex structures and are difficult to adapt to the diverse environments and scenarios in which the structure is located; (2) Some energy-consuming devices are difficult to disassemble and replace quickly after an earthquake, resulting in high maintenance costs; (3) Existing nodal dampers are not well adapted to prefabricated steel structure systems and are limited in variety.

[0004] Therefore, there is an urgent need to develop a prefabricated nodal damper that is simple in structure, easy to install, has controllable buckling deformation, and has good energy dissipation performance. Summary of the Invention

[0005] To address the technical problems of existing dampers, such as complex structure, low adaptability, and poor performance, the present invention aims to provide a detachable sector-shaped damper based on stable buckling energy dissipation. This damper has a simple structure, convenient installation, controllable buckling deformation, and good energy dissipation performance. Furthermore, a construction method for the detachable sector-shaped damper based on stable buckling energy dissipation is also provided, effectively overcoming the problems existing in the prior art.

[0006] To achieve the above objectives, the present invention provides a detachable sector-shaped damper based on stable buckling energy dissipation, comprising a connecting unit, a buckling energy dissipation unit, and a buckling restraint unit. The buckling energy dissipation unit comprises a first section, a second section, and a middle section. The first section, the middle section, and the second section are connected to form an annular sector-shaped energy dissipation plate. The first section and the second section are perpendicularly connected to the connecting unit. The cross-sectional area of ​​the middle section is smaller than that of the first section and the second section, so as to guide buckling to preferably occur in the middle section region, which facilitates buckling restraint and avoids large deformation and brittle fracture at the edge weld. The buckling restraint unit is disposed on the periphery of the buckling energy dissipation unit to limit the overall excessive buckling instability of the buckling energy dissipation unit. A gap is reserved between the buckling restraint unit and the buckling energy dissipation unit to allow the buckling deformation of the buckling energy dissipation unit.

[0007] Furthermore, the connection unit includes two connection end plates, each of which is provided with connection holes for assembly and connection with building structural components.

[0008] Furthermore, the planes on which the two connecting end plates are located are perpendicular to each other to accommodate the connection surfaces in two different directions at the beam-column joint.

[0009] Furthermore, the middle section of the buckling energy dissipation unit is smoothly connected to the first and second sections by an arc-shaped transition zone to significantly reduce stress concentration.

[0010] Furthermore, the buckling energy dissipation unit can adopt a design structure with equal or variable thickness.

[0011] Furthermore, the buckling restraint unit is a hollow shell, and its inner cavity shape is similar to the outer contour of the buckling energy dissipation unit. The inner cavity size of the buckling restraint unit is larger than the outer contour size of the buckling energy dissipation unit.

[0012] Furthermore, a limited space of 2-5 mm is reserved between the middle section of the buckling restraint unit and the buckling energy dissipation unit in both the circumferential and radial directions.

[0013] To achieve the above objectives, the present invention provides a construction method for a detachable sector-shaped damper based on stable buckling energy dissipation, which is implemented based on the aforementioned damper and includes the following steps: Step 1: Prefabricate the two end plates, buckling energy dissipation plate, and buckling restraint shell in the factory, and complete the overall assembly; Step 2: During on-site installation, fix the two end plates to the beam-column joints of the building structure respectively; Step 3: If the buckling energy dissipation plate suffers plastic damage after an earthquake, the entire damper should be replaced by disassembling the connecting components.

[0014] The present invention provides a detachable sector damper based on stable buckling energy dissipation and a construction method. First, the components of the invention can realize a construction method that combines factory prefabrication and on-site assembly, and have the characteristics of standardized production, convenient transportation and rapid installation.

[0015] Secondly, the device features outstanding stable buckling energy dissipation performance, good cyclic energy dissipation stability, convenient assembly and installation, and the ability to be disassembled, replaced, and maintained.

[0016] Meanwhile, the damper has a simple structure and strong adaptability, and can be applied to prefabricated steel structures, modular steel structures and building structures in high-intensity seismic zones, showing good prospects for engineering promotion and application.

[0017] Finally, this technology can serve as one of the important technical means to improve the toughness of prefabricated steel structures and modular structural systems, which helps to improve the seismic performance, energy dissipation capacity and post-earthquake recovery capacity of the structure. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0019] Figure 1 This is a schematic diagram of the overall structure of a detachable sector damper based on stable buckling energy dissipation. Figure 2 This is a schematic diagram of the unrestrained buckling unit in a detachable sector damper based on stable buckling energy dissipation. Figure 3 This is a side view of the buckling restraint unit in a detachable sector damper based on stable buckling energy dissipation. Figure 4 This is a front structural schematic diagram of the buckling restraint unit in a detachable sector damper based on stable buckling energy dissipation. Figure 5 This is a schematic diagram of the application assembly of a detachable sector damper based on stable buckling energy dissipation. The following is a description of the components in the attached diagram: 100. Connecting unit; 101. Connecting end plate; 200. Buckling energy dissipation unit; 201. First segment; 202. Second segment; 203. Middle segment; 300. Buckling restraint unit. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below with reference to specific illustrations.

[0021] To address the technical problems of existing dampers, such as complex structure, low adaptability, and poor performance, the present invention aims to provide a detachable sector-shaped damper based on stable buckling energy dissipation. It has a simple structure, convenient installation, controllable buckling deformation, and good energy dissipation performance. At the same time, a corresponding construction and installation process is designed to effectively combine with the device of this patent, ensuring the standardized installation and reasonable use of the device.

[0022] The present invention provides a detachable sector-shaped damper based on stable buckling energy dissipation, see [link to relevant documentation]. Figure 1 It includes a connecting unit 100, a buckling energy dissipation unit 200, and a buckling restraint unit 300; wherein, the two ends of the buckling energy dissipation unit 200 are respectively connected to the connecting unit 100 for dissipating energy, and the buckling restraint unit 300 is disposed outside the energy dissipation unit 200 for limiting its overall instability and improving the stability of cyclic energy dissipation and continuous energy dissipation capability.

[0023] Specifically, the connection unit 100 is used to connect the buckling energy dissipation unit 200 to the building structure, see [link to relevant documentation]. Figure 2 The connection unit 100 includes two connection end plates 101.

[0024] Each connecting end plate 101 is provided with a connecting hole, which can be used for assembly and connection with building structural components through a suitable connecting component. The assembly connection between the end plate connector and the structural node is convenient for installation and disassembly, and the damper can be quickly replaced after an earthquake, which significantly reduces the cost of post-earthquake repair and improves the structural toughness.

[0025] In practical applications, the planes on which the two connecting end plates 101 are located are perpendicular to each other to accommodate the connection surfaces in two different directions at the beam-column joint.

[0026] It should be noted that the material of the connecting end plate constituting the present invention is not limited in this solution, but Q355 grade steel is preferred. This structure has good strength and can ensure the stability of the connection structure.

[0027] See Figure 2 The buckling energy dissipation unit 200 includes a first section 201, a middle section 203 and a second section 202. The first section 201, the middle section 203 and the second section 202 are connected to form an annular fan-shaped energy dissipation plate. The first section 201 and the second section 202 are respectively perpendicularly connected to two connecting end plates 101.

[0028] Furthermore, the buckling energy dissipation unit 200, which is formed by connecting the first segment 201, the middle segment 203 and the second segment 202, has a cross-sectional area of ​​the middle segment 203 that is smaller than that of the first segment 201 and the second segment 202, so as to guide buckling to preferably occur in the middle segment region and avoid brittle fracture of the connection between the buckling energy dissipation unit 200 and the connecting unit 100.

[0029] Specifically, in this embodiment, the inner diameter of the fan-shaped section 203 is larger than the inner diameter of the fan-shaped section 201 and the second section 202, and the outer diameter of the fan-shaped section 203 is smaller than the outer diameter of the fan-shaped section 201 and the second section 202. This cross-sectional weakening design can guide buckling deformation to preferentially concentrate in the middle section region.

[0030] Secondly, the middle section 203 of the buckling energy dissipation unit is smoothly connected to the first section 201 and the second section 202 by an arc-shaped transition zone. The radius of the arc-shaped transition zone is optimized according to the plate thickness to significantly reduce stress concentration and avoid fracture damage in the radius transition zone.

[0031] Furthermore, the structure of the buckling energy dissipation plate 200 is not limited in this scheme. Here, it is preferred to use LY160 low yield point steel. At the same time, the buckling energy dissipation plate 200 can adopt a uniform thickness or variable thickness design structure. If a uniform thickness design is adopted, the thickness is preferably 10mm. With this combination, it can have excellent ductility and low yield characteristics.

[0032] Under normal operating conditions, wind loads, and minor earthquakes, the damper as a whole undergoes only minor deformation. The buckling energy dissipation plate 200 in the middle remains in the elastic stage, and the overall nodes maintain high stiffness, without affecting the normal service performance of the structure, achieving "no damage in minor earthquakes." Under moderate earthquakes, the node rotation angle increases, and the buckling energy dissipation plate 200 begins to buckle under compression. Through reciprocating buckling deformation, it dissipates seismic energy, concentrating structural damage on the damper itself, reducing the risk of plastic damage to the main beam and column components, protecting the main structure, and achieving "repairable under moderate earthquakes."

[0033] The core component, which is composed of the two end plates 101 and the buckling energy dissipation plate 200, is not limited in thickness and other geometric dimensions in this scheme. It can be adjusted according to the overall size of the structure and the seismic requirements of the structure.

[0034] Furthermore, the buckling restraint unit 300 is disposed outside the buckling energy dissipation unit 200 to limit the overall buckling instability of the buckling energy dissipation unit 200.

[0035] For details, see Figure 3 The buckling restraint unit 300 is a hollow shell and is fitted around the buckling energy dissipation unit 200. The overall arc length of the buckling restraint unit 300 is smaller than that of the buckling energy dissipation unit 200. After installation, the buckling restraint unit 300 is located in the middle section where the stress of the buckling energy dissipation unit 200 is concentrated, which can better restrain the buckling energy dissipation unit 200.

[0036] Further, see Figure 4 The inner cavity shape of the buckling restraint unit 300 is similar to the outer contour of the buckling energy dissipation unit 200 but slightly larger in size. This is to allow for a limited gap between the buckling restraint shell 300 and the buckling energy dissipation plate 200 when the buckling restraint shell 300 is placed over the periphery of the buckling energy dissipation plate 200. This gap provides space for buckling deformation, while limiting overall instability and promoting the formation of a stable multi-wave buckling deformation mode, thereby improving the stability of cyclic energy dissipation and continuous energy dissipation capability.

[0037] As an example, in this scheme, a limited space of 2-5mm is preferably reserved between the buckling restraint plate 300 and the buckling energy dissipation plate 200 in both the circumferential and radial directions, preferably 4mm. This size of gap allows the buckling energy dissipation plate 200 to undergo buckling deformation. At the same time, the restraint shell 300 can effectively limit the overall buckling instability of the buckling energy dissipation plate 200, so that the damper has a stable cyclic energy dissipation capacity and continuous energy dissipation capacity under cyclic load, guiding it to generate a high-order multi-wave buckling mode, thereby obtaining a full and stable hysteretic energy dissipation curve.

[0038] Meanwhile, it should be noted that the structure of the buckling restraint plate 300 is not limited in this scheme. It is preferred to use Q335 steel, which has sufficient stiffness and strength to effectively and stably limit the overall buckling instability of the buckling energy dissipation plate 200.

[0039] Finally, the geometric dimensions of the buckling restraint plate 300 are not limited in this scheme, and can be adjusted in conjunction with the buckling energy dissipation core component composed of the end plate 101 and the buckling energy dissipation plate 200.

[0040] After buckling restraint plate 300 is installed around buckling energy dissipation plate 200, under the action of a major earthquake, buckling energy dissipation plate 200 enters the stage of full buckling energy dissipation. Under the restraint of buckling restraint shell 300, it maintains stable energy dissipation capacity, continuously dissipates the seismic input energy, provides additional ductility and deformation reserve for the structure, avoids serious damage to the main structure, and achieves "no collapse under major earthquake".

[0041] After the earthquake, the damaged damper can be removed from the node by simply unscrewing the connecting components, and a new damper can be quickly replaced to restore the structure to its original seismic energy dissipation capacity.

[0042] Based on the above-described detachable sector damper with stable buckling energy dissipation, this scheme also provides a construction method for the detachable sector damper with stable buckling energy dissipation, as follows: Step 1: Prefabricate two end plates 101, buckling energy dissipation plate 200 and buckling restraint shell 300 in the factory and complete the overall assembly; Step 2: During on-site installation, fix the two end plates 101 to the beam-column joints of the building structure, as detailed below. Figure 5 ; Step 3: If the buckling energy dissipation plate 200 suffers plastic damage after the earthquake, the entire damper should be replaced by disassembling the connecting components.

[0043] In summary, the detachable sector damper based on stable buckling energy dissipation and its construction method provided in this solution have the following advantages over existing technologies: 1. Performance is clearly defined in stages: under minor earthquakes, the damper remains elastic and the joint strength is high; under moderate earthquakes, the buckling energy dissipation plate begins to buckle and dissipate energy, protecting the main structure; under major earthquakes, it fully buckles and dissipates energy, providing additional ductility, and achieving the seismic fortification goal of "no damage in minor earthquakes, repairable in moderate earthquakes, and no collapse in major earthquakes".

[0044] 2. Easy assembly and high replaceability: The assembly connection between the end plate and the structural node makes installation and disassembly convenient. The damper can be quickly replaced after an earthquake, which significantly reduces the cost of post-earthquake repair and improves the structural toughness.

[0045] 3. Stable energy dissipation and full hysteresis: The buckling-restrained shell guides and restricts the buckling energy dissipation plate to form a stable multi-wave buckling deformation mode, avoiding overall instability, so that the damper has stable cyclic energy dissipation capacity and continuous energy dissipation capacity under cyclic load.

[0046] 4. Simple structure and wide applicability: The overall configuration is simple and the stress is clear. It can be widely used in prefabricated steel structures, modular steel structures and seismic resistance systems for building structures in high-intensity seismic zones.

[0047] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A detachable sector-shaped damper based on stable buckling energy dissipation, characterized in that, The device includes a connecting unit, a buckling energy dissipation unit, and a buckling restraint unit. The buckling energy dissipation unit comprises a first segment, a second segment, and a middle segment. The first segment, the middle segment, and the second segment are connected to form an annular fan-shaped energy dissipation plate. The first segment and the second segment are perpendicularly connected to the connecting unit. The cross-sectional area of ​​the middle segment is smaller than that of the first segment and the second segment to guide buckling to preferably occur in the middle segment region, which facilitates buckling restraint and avoids large deformation and brittle fracture at the edge weld. The buckling restraint unit is disposed around the buckling energy dissipation unit to limit the overall excessive buckling instability of the buckling energy dissipation unit. A gap is reserved between the buckling restraint unit and the buckling energy dissipation unit to allow the buckling energy dissipation unit to undergo buckling deformation.

2. The detachable sector damper based on stable buckling energy dissipation according to claim 1, characterized in that, The connection unit includes two connection end plates, each of which is provided with connection holes for assembly and connection with building structural components.

3. A detachable sector-shaped damper based on stable buckling energy dissipation according to claim 2, characterized in that, The planes on which the two connecting end plates are located are perpendicular to each other to accommodate the connection surfaces in two different directions at the beam-column joint.

4. A detachable sector-shaped damper based on stable buckling energy dissipation according to claim 1, characterized in that, The middle section of the buckling energy dissipation unit is smoothly connected to the first and second sections by an arc-shaped transition zone to significantly reduce stress concentration.

5. A detachable sector-shaped damper based on stable buckling energy dissipation according to claim 4, characterized in that, The buckling energy dissipation unit can adopt a design structure with equal or variable thickness.

6. A detachable sector-shaped damper based on stable buckling energy dissipation according to claim 1, characterized in that, The buckling restraint unit is a hollow shell, and its internal cavity shape is similar to the outer contour of the buckling energy dissipation unit. The internal cavity size of the buckling restraint unit is larger than the outer contour size of the buckling energy dissipation unit.

7. A detachable sector damper based on stable buckling energy dissipation according to claim 1, characterized in that, A limited space of 2-5 mm is reserved between the middle section of the buckling restraint unit and the buckling energy dissipation unit in both the circumferential and radial directions.

8. A construction method for a detachable sector-shaped damper based on stable buckling energy dissipation, which is implemented based on the damper described in any one of claims 1-7, characterized in that, Includes the following steps: Step 1: Prefabricate the two end plates, buckling energy dissipation plate, and buckling restraint shell in the factory, and complete the overall assembly; Step 2: During on-site installation, fix the two end plates to the beam-column joints of the building structure respectively; Step 3: If the buckling energy dissipation plate suffers plastic damage after an earthquake, the entire damper should be replaced by disassembling the connecting components.

Images