Fabricated shear steel plate damper
Through the bolt connection design of the prefabricated shear steel plate damper, the problems of cumbersome welding process and insufficient web stiffness are solved, and greater deformation capacity and additional damping effect are achieved, simplifying the construction process and reducing costs.
Patent Information
- Application Number
- CN202420936892.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-04-30
AI Technical Summary
The welding process of existing shear steel plate dampers is cumbersome, resulting in long construction time and high labor costs, uncertain factors in the weld, reduced ductility of the damper, insufficient web stiffness, resulting in out-of-plane instability.
Adopting a prefabricated design, using bolted connection instead of welding, webs, end connection plates, flange plates and angle steel are connected by bolts to form a more uniform force distribution, improve deformation ability and ductility, and constrain the web plane through angle steel. Internal stiffness, delay buckling.
The construction process is simplified, labor costs are reduced, the energy consumption capacity and additional damping effect of the damper are improved, fatigue performance and stress concentration problems caused by welding are avoided, and the requirements of environmental protection and sustainable development are met.
Smart Images
Figure CN222183757U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of shock-absorbing and energy-consuming components, in particular to an assembled shear steel plate damper. Background Art
[0002] Shock absorption and energy dissipation technology is a technology that reduces the stress on structures by absorbing and consuming vibration energy. This technology is widely used in various fields, including construction, transportation, and military. In recent years, with the advancement of science and technology, shock absorption and energy dissipation technologies at home and abroad and the corresponding shock absorption and energy dissipation components have been continuously developed and improved. At present, after more than 30 years of development, the domestic research on energy dissipation dampers has begun to take shape. Design methods and specifications for various types of energy dissipation dampers are constantly emerging, and some energy dissipation components have also been used in specific projects, such as the Dujiangyan Xingfu Home·Yiyuan post-disaster reconstruction project and the Beijing Railway Station reinforcement and renovation project, which provide reliable support for the long-term development of shock absorption and energy dissipation technology.
[0003] In terms of the materials used for dampers, low yield point metals have attracted the attention of scholars due to their good ductility, high lateral stiffness, almost no influence of temperature, and high material utilization. In particular, they have stood out first with their own advantages of low cost and convenient material acquisition, and are favored by the consumer market.
[0004] As a passive energy dissipation and shock absorption component with simple structure and easy construction, the shear plate damper works on the principle that when subjected to earthquake, it can transform or absorb the energy transmitted into the structure through shear elastic-plastic deformation in the plane of the steel plate, reduce the vibration amplitude of the structure, achieve the purpose of energy dissipation and shock absorption, and thus realize the damping effect on the structure. As a lateral force absorbing component with stable hysteresis performance and excellent fatigue performance, the shear plate damper has been widely used in some practical projects.
[0005] However, the dampers currently used in engineering are mainly welded, which has the following defects: (1) The construction process is cumbersome, the construction time is long, and the labor cost is high; (2) There are many uncertain factors in the welds. If too many out-of-plane constraint components are set by welding, the ductility of the damper will be reduced, and the stability of the damper performance cannot be guaranteed; (3) The shear steel plate damper has a small yield displacement and poor deformation capacity. Although the web is weakened, the ductility of the damper is guaranteed, but at the same time, out-of-plane instability is caused due to insufficient web stiffness. In view of the above problems, the utility model proposes an assembled shear steel plate damper. Utility Model Content
[0006] The purpose of the utility model is to provide an assembled shear steel plate damper, which solves the problems mentioned in the above background technology by improving the design of the damper structure.
[0007] To achieve the above-mentioned purpose, the utility model provides an assembled shear steel plate damper, including a web, end connecting plates arranged at the upper and lower ends of the web, flange plates arranged at the left and right sides of the web, and eight angle steels; the web and the end connecting plates and the web and the flange plates are connected by bolts using the eight angle steels.
[0008] Preferably, the web is perpendicular to the end connecting plate and the flange plate, the angle steel is an L-shaped angle steel, one side of the angle steel is parallel to the web, and the other side of the angle steel is parallel to the end connecting plate or the flange plate.
[0009] Preferably, the web, the end connecting plate and the flange plate are all made of rectangular or square steel, and the yield strength of the steel is ≤235 MPa.
[0010] Preferably, the ratio of the steel height to width of the web is between 1 and 1.2.
[0011] Preferably, the angle steel is one of a rolled angle steel, a welded angle steel, a single angle steel or an angle steel with stiffening ribs.
[0012] Preferably, the end connecting plates are provided with two rows of bolt holes, with four bolt holes in each row, and the bolt holes are threaded.
[0013] Preferably, the flange plates are provided with two rows of bolt holes, with two bolt holes in each row.
[0014] Therefore, compared with the prior art, the utility model of an assembled shear steel plate damper has the following specific beneficial effects:
[0015] (1) Bolt connection is used to replace the welding between the energy dissipation web and the end connecting plate and flange plate, which releases the constraints of the stress concentration area at the end of the steel plate caused by welding, avoids the reduction of the damper's own fatigue performance caused by welding and the influence of stress concentration at the weld, so that the energy dissipation web is more evenly stressed, the shear deformation of the energy dissipation web is larger than that of the welded assembly, and has better deformation capacity and ductility, so that the web can participate in energy dissipation to a greater extent in the horizontal direction, improve the energy dissipation capacity of the shear steel plate damper, and make the structure have greater additional damping.
[0016] (2) In the assembled shear steel plate damper, the energy dissipation web is constrained by angle steels on all sides, which ensures the in-plane stiffness of the energy dissipation web and delays the occurrence of out-of-plane buckling of the energy dissipation web.
[0017] (3) The structure of the assembled shear steel plate damper is simple, and the entire damper component is detachable, which is convenient for component manufacturing and installation as well as subsequent maintenance work, making the component design more standardized and meeting the requirements of environmental protection and sustainable development.
[0018] (4) The assembled shear steel plate damper is connected by bolts throughout the entire process without welding, thus eliminating the impact of uncertainty caused by welds on the damper performance.
[0019] The technical solution of the utility model is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a three-dimensional structural schematic diagram of an assembled shear steel plate damper of the utility model;
[0021] Figure 2 This is a schematic diagram of the main structure of an assembled shear steel plate damper of the utility model;
[0022] Figure 3 It is a side view structural schematic diagram of an assembled shear steel plate damper of the utility model;
[0023] Reference numerals
[0024] 1-web plate; 2-end connecting plate; 3-flange plate; 4-angle steel; 5-bolt. DETAILED DESCRIPTION
[0025] The technical solution of the utility model is further described below through the accompanying drawings and embodiments.
[0026] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0027] Example
[0028] like Figure 1-3As shown, the utility model discloses an assembled shear steel plate damper, comprising a web 1, two end connecting plates 2, two flange plates 3 and eight rolled angle steels 4, wherein the two end connecting plates 2 are connected to the upper and lower sides of the web 1 by bolts 5 with the help of four angle steels 4, and the two flange plates 3 are connected to the left and right sides of the web 1 by bolts 5 with the help of four angle steels 4. The web 1, the end connecting plates 2 and the flange plates 3 are all rectangular steels, and the yield strength of the steel is 235MPa. The ratio of the steel height to the width of the web 1 is 1.1.
[0029] The web 1 is perpendicular to the end connection plates 2 at the upper and lower ends and the flange plates 3 at the left and right sides. The edges of the web 1 are strictly aligned with the edges of the end connection plates 2 and the flange plates 3. The eight angle steels 4 are all L-shaped angle steels 4. One side of the upper and lower angle steels is parallel to the web 1 and the other side is parallel to the end connection plate 2. One side of the left and right angle steels is parallel to the web 1 and the other side is parallel to the flange plate 3. Gaps are left between the upper and lower angle steels and the left and right angle steels to avoid mutual extrusion. The net distance of the gap left between the upper and lower angle steels and the left and right angle steels needs to be rounded to the multiple of the fifth value according to the requirements of the inter-story displacement angle, the floor height and the design height of the damper web 1, so as to ensure that the restraining effect of the angle steel 4 on the web 1 during the shear deformation of the web 1 will not be reduced due to the mutual extrusion between the angle steels 4.
[0030] In this embodiment, bolt holes are reserved on the two end connecting plates 2. There are three rows of bolt holes for connecting each end connecting plate 2 to the frame structure. Except for the middle row of two, there are five bolt holes in each row, which are located at the edge of the end connecting plate 2. Two rows of bolt holes are opened in the middle part of each end connecting plate 2, four in each row, and the bolt holes are threaded to replace the role of nuts for fastening with bolts 5. When the upper angle steel and the upper end connecting plate are connected and fixed by bolts 5, the head of the bolt 5 faces downward. After the bolt 5 is fully screwed into the reserved bolt hole and fastened with the thread in the hole, the bolt 5 is embedded in the upper end connecting plate and will not extend out of the upper side of the upper end connecting plate. When the lower angle steel and the lower end connecting plate are connected and fixed by bolts 5, the head of the bolt 5 faces upward. After the bolt 5 is fully screwed into the reserved bolt hole and fastened with the thread in the hole, the bolt 5 is embedded in the lower end connecting plate and will not extend out of the lower side of the lower end connecting plate. If necessary, the ends of the bolts 5 connected to one side of the two end connecting plates 2 and the angle steel 4 can be welded to the end connecting plates 2 to strengthen the fixation.
[0031] In this embodiment, bolt holes are reserved on both flange plates 3, and there are four rows of bolt holes for connecting each flange plate 3 with two angle steels 4, with two holes in each row. The inner surface of the bolt hole is smooth and without threads, and the bolt 5 is fastened with a nut outside the hole.
[0032] When preparing the damper of the utility model, the following steps are included:
[0033] (1) The upper end connecting plate, the lower end connecting plate, the web 1, the flange plates 3 on both sides and the angle steel 4 are subjected to hole cutting processing, and a plurality of bolt holes are opened on the upper end connecting plate, the lower end connecting plate, the web 1, the flange plates 3 on both sides and the angle steel 4.
[0034] (2) Fix the lower end connecting plate on the processing table, align the web 1 vertically with the lower end connecting plate, and align the center axis of the web 1 with the center axis of the lower end connecting plate. Then use two pieces of angle steel 4 with holes drilled in them to align the holes and fix the web 1 vertically on the lower end connecting plate through bolts 5.
[0035] (3) Use the lever arm to align the upper end connecting plate vertically with the web 1, align the center axis of the web 1 with the center axis of the upper end connecting plate, and then use two pieces of angle steel 4 with holes drilled in them to align the upper side of the web 1 vertically and fix it to the upper end connecting plate through bolts 5.
[0036] (4) In a similar manner, align the flange plates 3 on both sides vertically with the web plate 1, align the central axis of the web plate 1 with the central axis of the flange plates 3 on both sides, and finally use two angle steels 4 with holes drilled in them to align the left and right sides of the web plate 1 vertically with the flange plates 3 on both sides through bolts 5 to complete the assembly.
[0037] Therefore, the utility model adopts the assembled shear steel plate damper of the above structure, and replaces the welding of the energy-absorbing web with the end connecting plate and the flange plate by bolt connection, thereby releasing the constraint of the stress concentration area at the end of the steel plate caused by welding, avoiding the reduction of the fatigue performance of the damper itself caused by welding and the influence of stress concentration at the weld, so that the energy-absorbing web is more evenly stressed, the shear deformation of the energy-absorbing web is larger than that of the welded assembly, and has better deformation capacity and ductility, so that the web can participate in energy consumption to a greater extent in the horizontal direction, improve the energy-absorbing capacity of the shear steel plate damper, and allow the structure to have greater additional damping. At the same time, the energy-absorbing web of the damper is constrained by angle steel on all sides, which ensures the in-plane stiffness of the energy-absorbing web and delays the occurrence of out-of-plane buckling of the energy-absorbing web.
[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that they can still modify or replace the technical solution of the utility model with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the utility model.
Claims
1. An assembled shear steel plate damper, Features: It includes a web, end connecting plates arranged at the upper and lower ends of the web, flange plates arranged at the left and right sides of the web, and eight angle steels; the web and the end connecting plates and the web and the flange plates are connected by bolts using the eight angle steels.
2. The assembled shear steel plate damper according to claim 1, Features: The web is perpendicular to the end connecting plate and the flange plate, the angle steel is an L-shaped angle steel, one side of the angle steel is parallel to the web, and the other side of the angle steel is parallel to the end connecting plate or the flange plate.
3. The assembled shear steel plate damper according to claim 1, Features: The web plate, the end connecting plate and the flange plate are all made of rectangular or square steel, and the yield strength of the steel is ≤235MPa.
4. The assembled shear steel plate damper according to claim 3, Features: The ratio of the steel height to width of the web is between 1 and 1.
2.
5. The assembled shear steel plate damper according to claim 1, Features: The angle steel is one of rolled angle steel, welded angle steel, single angle steel or angle steel with stiffening ribs.
6. The assembled shear steel plate damper according to claim 1, Features: The end connecting plates are each provided with two rows of bolt holes, with four bolt holes in each row, and the bolt holes are provided with threads.
7. The assembled shear steel plate damper according to claim 1, Features: The flange plates are each provided with two rows of bolt holes, with two bolt holes in each row.