Honeycomb module bridge anti-seismic stop block

Abstract

The honeycomb module bridge anti-seismic stop block comprises a bridge anti-seismic steel structure frame and a honeycomb energy dissipation module, the honeycomb energy dissipation module is of a square structure and is mainly composed of a plurality of honeycomb unit arrays, each honeycomb unit is of a hollow hexagonal structure, and wedge block units are connected to the peripheries of the arrayed honeycomb units in a clamped mode. The connecting plates are fixedly installed on the two sides of the honeycomb energy dissipation module and fixedly installed in the bridge anti-seismic steel structure frame through bolts. The bridge anti-seismic check block is light in structure, flexible in response, standard in module and easy to replace, and the limiting control capacity, the overall anti-seismic performance and the post-earthquake rapid recovery capacity of small and medium-span bridges under the action of earthquake loads are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of earthquake resistance of civil engineering structures, and specifically to an earthquake-resistant retaining block for a honeycomb module bridge. Background Art

[0002] With the continuous development of China's transportation infrastructure construction, bridges, as key transportation hubs, have increasingly attracted attention for their seismic performance of structures. According to the "Code for Seismic Design of Highway Bridges" (JTG / T 2231-01—2020), bridges should have a certain ability to resist seismic loads. Especially in earthquake-prone areas, the design of their seismic structures has become the core content of structural safety assurance.

[0003] Currently, the commonly used seismic measures for bridges mainly include structures such as rigid retaining blocks, limiters, and isolation bearings. Among them, the cast-in-place rigid retaining block, as a traditional seismic limiting device, is widely used in the structures of small and medium-span bridges (see the literature: "China Journal of Highway", No. 6, 2021). Its main function is to limit the lateral displacement of the beam body under seismic action and prevent the beam body from falling off. However, this type of retaining block is extremely prone to irreversible damages such as concrete cracking, steel bar yielding, or overall failure in strong earthquakes, and it is difficult to repair after the earthquake, with a long maintenance period, seriously affecting the restoration of the bridge's traffic function.

[0004] To improve the repair efficiency of bridges after earthquakes, in recent years, researchers have proposed a modular replaceable retaining block structure. For example, the replaceable modular limiting retaining block proposed in the master's thesis "Research on the Seismic Performance of Bridges with New Retaining Blocks" is composed of a vertical plate, an upper top plate, a lower bottom plate, a replaceable energy dissipation section, and adjustable connecting side plates. Among them, the core energy dissipation component is the replaceable shear section located in the middle of the retaining block, which absorbs energy through yield deformation during earthquakes and has the characteristics of "one controllable and three easy" (controllable, easy to inspect, easy to repair, and easy to replace).

[0005] This device connects the modules between the vertical plates of the retaining block through high-strength bolts and is installed between the main girders of the bridge. Its working mechanism is as follows: 1. Under frequent earthquakes, the replaceable section yields in shear first, playing a primary energy dissipation role; 2. During rare earthquakes, the replaceable section and the overall retaining block cooperate to undergo plastic energy dissipation; 3. After the earthquake, the energy dissipation section is replaced to achieve the rapid repair function of the retaining block.

[0006] This structure effectively improves the efficiency of post-earthquake function restoration and verifies its excellent seismic performance through shaking table and finite element simulation. However, this structure still has the following technical limitations: 1. Single energy dissipation mode: The energy dissipation section mainly relies on lateral shear deformation and lacks multi-directional and multi-level buffer designs; 2. The internal structure of the component is solid and rigid, lacking the progressive collapse deformation characteristics of a lightweight honeycomb structure, and it is difficult to absorb the large energy input during a strong earthquake; 3. The mechanical response control is single: The internal partition response mechanism of the structure cannot be formed, and it is impossible to achieve hierarchical damage and elastoplastic conversion according to the energy level; 4. The structure form is complex, and the requirements for manufacturing and processing accuracy are high. There are still cost and construction adaptability problems in actual engineering applications.

[0007] Therefore, we propose a honeycomb module bridge seismic block to solve the problems mentioned above. Summary of the Invention

[0008] The purpose of the present invention is to provide a honeycomb module bridge seismic block to solve the problems mentioned in the above background technology.

[0009] To achieve the above purpose, the present invention provides the following technical solution: A honeycomb module bridge seismic block, including: a bridge seismic steel structure frame and a honeycomb energy dissipation module. The honeycomb energy dissipation module is a square structure, mainly composed of an array of several honeycomb units. The honeycomb unit is a hollow hexagonal structure. Wedge units are clamped around the array of honeycomb units. Connecting plates are fixedly installed on both sides of the honeycomb energy dissipation module, and the connecting plates are fixedly installed in the bridge seismic steel structure frame through bolts; The bridge seismic steel structure frame includes a top plate, a base, module fixing bolts, support columns, strengthening support plates, adjustable side plates and buffer pads. Among them, support columns and several strengthening support plates are installed between the top plate and the base. The base is fixedly installed on the bridge capping beam through module fixing bolts. The top plate is welded under the bridge main beam. An adjustable side plate is welded at one end of the top plate. A buffer pad is fixedly arranged on the side of the adjustable side plate. The buffer pad faces the bridge beam body and there is a 30mm gap between the buffer pad and the bridge beam body. The honeycomb energy dissipation module is fixedly installed between adjacent two strengthening support plates and between the strengthening support plate and the support column.

[0010] Preferably, the bridge seismic steel structure frame is made of Q235 steel material. Notches for positioning the honeycomb energy dissipation module are provided on the side walls of the support columns and the strengthening support plates.

[0011] Preferably, the honeycomb units of the honeycomb energy dissipation module are made by stamping 5052-H32 aluminum alloy.

[0012] Preferably, the wall thickness of the honeycomb unit is 2mm, the side length is 15mm, the overall height is 200mm, and the length is 300mm.

[0013] Preferably, the outer shape of the honeycomb unit is a parallelepiped.

[0014] Preferably, the buffer pad is made of a 5mm thick natural rubber sheet.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. By means of the programmable collapse mechanism of the honeycomb unit, the problems of rigid energy consumption, large force mutation, and low displacement control accuracy of the existing stoppers in earthquakes are solved, enabling the stoppers to respond with micro-deformations in minor earthquakes and gradually consume energy in major earthquakes, thereby enhancing the energy consumption range and seismic adaptability; 2. Utilizing the mechanical properties of lightweight and high-strength honeycomb aluminum materials, the self-weight of the stoppers is reduced, the risk of local stress concentration caused by rigid collisions is alleviated, and at the same time, the additional load on the upper structure of the bridge is reduced, enhancing the co-deformation ability between the stoppers and the beam body and the capping beam; 3. Through the unitized and standardized design of the honeycomb modules, users can quickly replace local units according to the damaged parts, without the need to replace the whole block or perform cumbersome bolt disassembly and assembly, improving the post-earthquake repair efficiency and reducing labor and maintenance costs; 4. The honeycomb modules can be flexibly spliced and assembled according to the horizontal and vertical spaces of different bridge types, and are applicable to various bridge structural forms and different stopper space layout conditions, solving the problem of rigid mismatch of traditional structural dimensions; Through the above innovative design, the present invention provides a new type of bridge seismic stopper with lightweight structure, flexible response, standard modules, and easy replacement, enhancing the limit control ability, overall seismic performance, and post-earthquake rapid recovery ability of medium and small-span bridges under seismic loads. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention and bridge assembly; Figure 2 It is a structural schematic diagram of the present invention; Figure 3 It is a structural schematic diagram of the honeycomb energy-consuming module in the present invention.

[0017] In the figure: 1. Bridge seismic steel structure frame; 11. Top plate; 13. Base; 14. Module fixing bolts; 15. Support columns; 16. Reinforcing support plates; 17. Adjustable side plates; 18. Buffer pads; 2. Honeycomb energy-consuming module; 21. Honeycomb units; 22. Wedge units; 3. Bridge capping beam; 4. Bridge beam body; 5. Bridge main beam. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] Please refer toFigures 1-3 , the present invention provides a technical solution: a honeycomb module bridge seismic block, comprising: a bridge seismic steel structure frame 1 and a honeycomb energy dissipation module 2. The honeycomb energy dissipation module 2 is of a square structure and is mainly composed of an array of a plurality of honeycomb units 21. The honeycomb unit 21 is of a hollow hexagonal structure. Wedge units 22 are clamped around the array of honeycomb units 21. Connecting plates are fixedly installed on both sides of the honeycomb energy dissipation module 2, and the connecting plates are fixedly installed in the bridge seismic steel structure frame 1 by bolts; The bridge seismic steel structure frame 1 includes a top plate 11, a base 13, module fixing bolts 14, support columns 15, reinforcing support plates 16, adjustable side plates 17 and a buffer pad 18. Among them, support columns 15 and a plurality of reinforcing support plates 16 are installed between the top plate 11 and the base 13. The base 13 is fixedly installed on the bridge capping beam 3 by module fixing bolts 14. The top plate 11 is welded under the bridge main beam 5. One end of the top plate 11 is welded with an adjustable side plate 17. A buffer pad 18 is fixedly arranged on the side of the adjustable side plate 17. The buffer pad 18 faces the bridge beam body 4 and a 30-mm gap is reserved between the buffer pad 18 and the bridge beam body 4. The honeycomb energy dissipation module 2 is fixedly installed between adjacent two reinforcing support plates 16 and between the reinforcing support plate 16 and the support column 15; Under the action of an earthquake, the bridge beam body 4 generates a lateral displacement. When the displacement reaches the limit of the gap, first the buffer pad 18 is compressed, and then the honeycomb energy dissipation module 2 is stressed and enters the non-linear deformation zone. The honeycomb units 21 gradually collapse and deform, releasing energy and suppressing the peak acceleration of the structure. If the honeycomb energy dissipation module 2 is plastically damaged after the earthquake, the honeycomb energy dissipation module 2 can be removed and replaced.

[0020] The bridge seismic steel structure frame 1 is made of Q235 steel material. Notches for limiting the honeycomb energy dissipation module 2 are opened on the side walls of the support columns 15 and the reinforcing support plates 16 for positioning the honeycomb energy dissipation module 2 to enable the rapid installation of the honeycomb energy dissipation module 2.

[0021] The honeycomb units 21 of the honeycomb energy dissipation module are stamped from 5052-H32 aluminum alloy. The wall thickness of the honeycomb unit 21 is 2 mm, the side length is 15 mm, the overall height is 200 mm, the length is 300 mm, and the outer shape of the honeycomb unit 21 is a parallelepiped.

[0022] The buffer pad 18 is made of a 5-mm-thick natural rubber sheet.

[0023] To verify the technical effect of the present invention, the following pseudo-static experiment and comparative study are carried out: The model of the test device adopts a 1:20 scale bridge structure model (a simply supported T-beam bridge with a span of 2×20 m). The comparison object is the new replaceable modular limit block in the master's thesis "Research on the Seismic Performance of Bridges with New Blocks"; Project Honeycomb module stopper Shearing steel plate stopper Peak displacement reduction rate 47.8% 32.5% Improved hysteretic energy dissipation capacity +24.1% Benchmark Peak collision force 8.2 kN 13.9 kN Time required for module replacement (single person) <12 minutes 58 minutes Due to its buffer characteristics from collapse to recovery, the honeycomb energy dissipation module 2 of the present invention exhibits better energy dissipation efficiency and buffer performance under large earthquake simulations, effectively reducing the peak displacement of the beam body and the impact force of collisions; the standardized design of the module facilitates rapid on-site replacement and maintenance, significantly improving the efficiency of bridge traffic restoration after an earthquake.

[0024] In summary, the present invention has achieved significant improvements in the flexible control, energy dissipation capacity, installation efficiency, and versatility of the seismic bumper through the honeycomb structure design, and has good engineering feasibility and promotion value.

[0025] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0026] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. The anti-seismic block of the honeycomb module bridge is characterized in that Including: A bridge seismic steel structure frame (1) and a honeycomb energy dissipation module (2). The honeycomb energy dissipation module (2) is of a square structure and is mainly composed of an array of a number of honeycomb cells (21). The honeycomb cells (21) are of a hollow hexagonal structure. Wedge block units (22) are clamped around the array of honeycomb cells (21). Connecting plates are fixedly installed on both sides of the honeycomb energy dissipation module (2), and the connecting plates are fixedly installed in the bridge seismic steel structure frame (1) by bolts. The bridge seismic steel structure frame (1) includes a top plate (11), a base (13), module fixing bolts (14), support columns (15), strengthening support plates (16), adjustable side plates (17), and buffer pads (18). Among them, support columns (15) and a number of strengthening support plates (16) are installed between the top plate (11) and the base (13). The base (13) is fixedly installed on the bridge capping beam (3) by module fixing bolts (14). The top plate (11) is welded under the bridge main beam (5). One end of the top plate (11) is welded with an adjustable side plate (17). A buffer pad (18) is fixedly arranged on the side of the adjustable side plate (17). The buffer pad (18) faces the bridge beam body (4) and there is a 30-mm gap between the buffer pad (18) and the bridge beam body (4). The honeycomb energy dissipation module (2) is fixedly installed between adjacent two strengthening support plates (16) and between the strengthening support plate (16) and the support column (15).

2. The honeycomb module bridge seismic bumper according to claim 1, characterized in that, The bridge seismic steel structure frame (1) is made of Q235 steel material. Notches for positioning the honeycomb energy dissipation module (2) are provided on the side walls of the support columns (15) and the strengthening support plates (16).

3. The seismic block for a honeycomb module bridge according to claim 1, characterized in that, The honeycomb cells (21) of the honeycomb energy dissipation module are made by stamping 5052-H32 aluminum alloy.

4. The honeycomb module bridge seismic shock absorber according to claim 3, wherein The wall thickness of the honeycomb cell (21) is 2 mm, the side length is 15 mm, the overall height is 200 mm, and the length is 300 mm.

5. The honeycomb module bridge seismic bumper according to claim 4, characterized in that, The outer shape of the honeycomb cell (21) is a parallelepiped.

6. The seismic block of the honeycomb module bridge according to claim 1, characterized in that The buffer pad (18) is made of a 5-mm-thick natural rubber sheet.

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