Graded yield I-shaped mild steel damper for bridge

Abstract

The utility model relates to the technical field of earthquake resistance of civil engineering, in particular to a graded yield I-shaped mild steel damper for a bridge, which comprises an energy consumption system of the damper, an upper connecting component connected with a diaphragm plate at the bottom of a bridge and a lower connecting component connected with the top surface of a bridge pier, the damper can adapt to transverse displacement generated by bridge stress, so that the damper can bear longitudinal one-way force generated by bridge vibration and absorb longitudinal energy consumption, the vertical energy consumption steel sheets, the I-shaped energy consumption steel sheets and the X-shaped energy consumption steel sheets in the energy consumption system are different in yield strength and form multi-stage yield, meanwhile, the energy consumption system is fixed to the upper wing plate and the lower wing plate through bolts, and the energy consumption system is fixed to the upper wing plate and the lower wing plate through bolts. The anti-seismic energy dissipation steel sheet is simple in structure, convenient to machine, high in economic benefit and high in anti-seismic capacity, bridge collapse can be more effectively avoided when an earthquake occurs, and the anti-seismic aim of a building is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of earthquake resistance in civil engineering, in particular to a graded yielding I-shaped mild steel damper for bridges. Background Art

[0002] A vibration damper is a device that converts the mechanical vibration energy of a solid into other energy. When the damping of the vibration system itself or the internal damping of certain vibration isolation measures is not enough to suppress the vibration response of the system near the natural frequency, an external vibration damper is often required. It mainly includes several types such as steel dampers, friction dampers, magnetic dampers and air dampers.

[0003] The current types of steel dampers mainly include: butterfly-type, U-type, Z-type and other metal steel dampers, which have complex structures and are difficult to process. They cannot adapt to the unidirectional force caused by the unidirectional displacement of the bridge, have poor vibration absorption ability, poor supporting performance, and are prone to vibration deformation. Utility Model Content

[0004] The utility model aims to solve the above problems, thereby providing a graded yielding I-shaped mild steel damper for bridges.

[0005] The utility model solves the above problems and adopts the following technical solutions:

[0006] A graded yield I-shaped mild steel damper for a bridge comprises an energy dissipation system of the damper, an upper connection assembly connected to a transverse diaphragm at the bottom of a bridge beam, and a lower connection assembly connected to a top surface of a bridge pier, wherein the energy dissipation system is located between the upper connection assembly and the lower connection assembly, and after being connected, the whole is in an I-shape; the energy dissipation system comprises an upper support plate, a lower support plate, and vertical energy dissipation steel sheets, I-shaped energy dissipation steel sheets, and X-shaped energy dissipation steel sheets located between the two support plates, wherein four vertical energy dissipation steel sheets are arranged in a rectangular shape and stand between the upper support plate and the lower support plate, and the I-shaped energy dissipation steel sheets and the X-shaped energy dissipation steel sheets are arranged between two adjacent vertical energy dissipation steel sheets at intervals;

[0007] The upper connecting assembly includes an upper wing plate, a sliding friction plate, and a clamping plate. The upper wing plate is located above the energy dissipation system and the middle part is bolted to the upper support plate. Sliding friction plates are arranged above both sides of the upper wing plate, and clamping plates are arranged below both sides of the upper wing plate. The sliding friction plate and the clamping plate clamp the upper wing plate in the middle and are connected by bolts. A sliding groove is provided on the sliding friction plate that matches the bottom surface shape of the cross diaphragm at the bottom of the bridge beam.

[0008] Compared with the prior art, the utility model adopting the above technical solution has the following outstanding features:

[0009] 1) The slide groove on the sliding friction plate can adapt to the lateral displacement caused by the bridge force, so that the damper can withstand the longitudinal unidirectional force generated by the bridge vibration, absorb the longitudinal energy consumption, and is not easy to deform.

[0010] 2) The I-shaped mild steel damper for bridges can dissipate energy along the entire cross-section yielding within the height range under the action of horizontal earthquakes, and has an ideal energy dissipation capacity. At the same time, it can well adapt to the large longitudinal displacement deformation of the bridge. In addition, the upper part of the I-shaped mild steel damper for bridges adopts a sliding connection, which can adapt to the complex lateral deformation of the main beam and ensure that the force transmission path of the metal damper is clear under the action of earthquakes.

[0011] 3) Vertical energy-absorbing steel sheets, I-shaped energy-absorbing steel sheets and X-shaped energy-absorbing steel sheets have different yield strengths, forming multi-level yields. At the same time, the energy-absorbing system is fixed to the upper and lower wing plates by bolts, which is convenient for replacing the damaged energy-absorbing steel sheets. It has a simple structure, convenient processing, high economic benefits, and strong seismic resistance. It can more effectively prevent the collapse of the bridge when an earthquake occurs, thus achieving the goal of building seismic resistance.

[0012] As a preferred embodiment, a further technical solution of the utility model is:

[0013] The plane where the I-shaped energy-absorbing steel sheet is located is perpendicular to the length direction of the slide groove on the sliding friction plate.

[0014] Anti-skid rubber plates are arranged between the sliding friction plate and the upper wing plate, and between the upper wing plate and the clamping plate.

[0015] The lower connection assembly includes a lower wing plate and four clamping plates. The lower wing plate is located below the energy dissipation system and the middle part is bolted to the lower support plate. The four clamping plates are located on both sides of the lower wing plate in groups of two to clamp the lower wing plate in the middle and connect them by bolts.

[0016] Anti-skid rubber plates are arranged between the four clamping plates and the lower wing plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the main structure of an embodiment of the utility model;

[0018] Figure 2 This is a schematic diagram of the main structure of an embodiment of the utility model;

[0019] Figure 3 It is a side view structural schematic diagram of an embodiment of the utility model;

[0020] Figure 4 This is a schematic diagram of the main structure of the sliding friction plate of the embodiment of the utility model;

[0021] Figure 5 This is a schematic diagram of the main structure of the energy consumption system of the utility model embodiment;

[0022] Marked in the figure are: slide groove 1, sliding friction plate 2, anti-skid rubber plate 3, upper wing plate 4, upper support plate 5, vertical energy-absorbing steel sheet 6, I-shaped energy-absorbing steel sheet 7, clamping plate 8, lower support plate 9, lower wing plate 10, X-shaped energy-absorbing steel sheet 11, bolt 12. DETAILED DESCRIPTION

[0023] The present invention is further described below in conjunction with embodiments, the purpose of which is only to provide a better understanding of the content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.

[0024] See also Figure 1-Figure 5 A graded yield I-shaped mild steel damper for bridges, comprising an energy dissipation system of the damper, an upper connection assembly connected to the bottom diaphragm of the bridge beam, and a lower connection assembly connected to the top surface of the bridge pier, wherein the energy dissipation system is located between the upper connection assembly and the lower connection assembly, and the whole is in an I-shape after connection; the energy dissipation system comprises an upper support plate 5, a lower support plate 9, and a vertical energy dissipation steel sheet 6, an I-shaped energy dissipation steel sheet 7 and an X-shaped energy dissipation steel sheet 11 located between the two support plates, wherein four vertical energy dissipation steel sheets 6 are arranged and stand upright in a rectangular shape between the upper support plate 5 and the lower support plate 9, and the I-shaped energy dissipation steel sheet 7 and the X-shaped energy dissipation steel sheet 11 are arranged between two adjacent vertical energy dissipation steel sheets 6 at intervals;

[0025] The upper connecting assembly includes an upper wing plate 4, a sliding friction plate 2, and a clamping plate 8. The upper wing plate 4 is located above the energy dissipation system and is bolted to the upper support plate 5 in the middle. Sliding friction plates 2 are arranged above both sides of the upper wing plate 4, and clamping plates 8 are arranged below both sides of the upper wing plate 4. The sliding friction plate 2 and the clamping plate 8 clamp the upper wing plate 4 in the middle and are connected by bolts. The sliding friction plate 2 is provided with a slide groove 1 that is adapted to the bottom surface shape of the cross diaphragm at the bottom of the bridge beam.

[0026] The plane where the I-shaped energy-absorbing steel sheet 7 is located is perpendicular to the length direction of the slide groove 1 on the sliding friction plate 2 .

[0027] Anti-skid rubber plates 3 are provided between the sliding friction plate 2 and the upper wing plate 4 , and between the upper wing plate 4 and the clamping plate 8 .

[0028] The lower connection assembly includes a lower wing plate 10 and four clamping plates 8. The lower wing plate 10 is located below the energy consumption system and is bolted to the lower support plate 9 in the middle. The four clamping plates 8 are located on both sides of the lower wing plate 10 in groups of two, clamping the lower wing plate 10 in the middle and connecting them by bolts.

[0029] Anti-skid rubber plates 3 are arranged between the four clamping plates 8 and the lower wing plate 10 .

[0030] The upper support plate 5 and the lower support plate 9 of the energy dissipation system described in the utility model are connected to the upper connecting assembly and the lower connecting assembly by bolts 12, which is convenient for later maintenance, replacement, and disassembly and assembly.

[0031] The slide groove on the sliding friction plate of the utility model can adapt to the lateral displacement caused by the bridge force, so that the damper can withstand the longitudinal unidirectional force caused by the vibration of the bridge, absorb the longitudinal energy consumption, and is not easy to deform.

[0032] The I-shaped mild steel damper for bridges can dissipate energy by yielding along the entire cross-section within the height range when facing horizontal earthquakes, and has ideal energy dissipation capacity. At the same time, it can well adapt to the large longitudinal displacement deformation of the bridge. In addition, the upper part of the I-shaped mild steel damper for bridges adopts a sliding connection, which can adapt to the complex lateral deformation of the main beam and ensure that the force transmission path of the metal damper is clear under the action of earthquakes.

[0033] Vertical energy-absorbing steel sheets, I-shaped energy-absorbing steel sheets and X-shaped energy-absorbing steel sheets have different yield strengths, forming multi-level yields. At the same time, the energy-absorbing system is fixed to the upper and lower wing plates by bolts, which is convenient for replacing the damaged energy-absorbing steel sheets. It has a simple structure, convenient processing, high economic benefits, and strong seismic resistance. It can more effectively prevent bridge collapse when an earthquake occurs, thereby achieving the goal of building seismic resistance.

[0034] The above description is only a preferred feasible embodiment of the present utility model, and does not limit the scope of rights of the present utility model. All equivalent changes made using the contents of the present utility model specification and its drawings are included in the scope of rights of the present utility model.

Claims

1. A graded yield I-shaped mild steel damper for a bridge, comprising an energy dissipation system of the damper, an upper connection assembly connected to a diaphragm at the bottom of a bridge beam, and a lower connection assembly connected to a top surface of a bridge pier, characterized in that: The energy dissipation system is located between the upper connecting assembly and the lower connecting assembly, and is in an I-shape as a whole after being connected; the energy dissipation system includes an upper support plate, a lower support plate, and vertical energy dissipation steel sheets, I-shaped energy dissipation steel sheets and X-shaped energy dissipation steel sheets located between the two support plates. Four vertical energy dissipation steel sheets are arranged in a rectangular shape between the upper support plate and the lower support plate, and the I-shaped energy dissipation steel sheets and the X-shaped energy dissipation steel sheets are arranged between two adjacent vertical energy dissipation steel sheets; The upper connecting assembly includes an upper wing plate, a sliding friction plate, and a clamping plate. The upper wing plate is located above the energy dissipation system and the middle part is bolted to the upper support plate. Sliding friction plates are arranged above both sides of the upper wing plate, and clamping plates are arranged below both sides of the upper wing plate. The sliding friction plate and the clamping plate clamp the upper wing plate in the middle and are connected by bolts. A sliding groove is provided on the sliding friction plate that matches the bottom surface shape of the cross diaphragm at the bottom of the bridge beam.

2. The graded yield I-shaped mild steel damper for bridges according to claim 1, characterized in that: The plane where the I-shaped energy-absorbing steel sheet is located is perpendicular to the length direction of the slide groove on the sliding friction plate.

3. The graded yield I-shaped mild steel damper for bridges according to claim 1, characterized in that: Anti-skid rubber plates are arranged between the sliding friction plate and the upper wing plate, and between the upper wing plate and the clamping plate.

4. The graded yield I-shaped mild steel damper for bridges according to claim 1, characterized in that: The lower connection assembly includes a lower wing plate and four clamping plates. The lower wing plate is located below the energy dissipation system and the middle part is bolted to the lower support plate. The four clamping plates are located on both sides of the lower wing plate in groups of two to clamp the lower wing plate in the middle and connect them by bolts.

5. The graded yield I-shaped mild steel damper for bridges according to claim 4, characterized in that: Anti-skid rubber plates are arranged between the four clamping plates and the lower wing plate.

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