Embedded bridge anti-seismic stop block

Abstract

The invention relates to the technical field of bridge seismic resistance, in particular to an anti-seismic check block which comprises a bridge pavement, a plurality of embedding grooves are formed in the top of the bridge pavement, anti-seismic check blocks are arranged in the embedding grooves, anti-seismic gaps h are formed between the anti-seismic check blocks and the embedding grooves, the anti-seismic gaps h are larger than the vertical displacement y of a bridge, and anti-seismic gaskets are arranged in the anti-seismic gaps h. The side grooves are formed in the two sides of the embedded groove, so that the extension plate can make contact with the top of the road surface in the side grooves, vibration conducted by the road surface is conducted to the anti-seismic check block through the extension plate, the anti-seismic cushion pad and the damping telescopic rod on the lower portion assist in achieving the anti-seismic buffering effect, and the side grooves are provided with two gaps in the horizontal direction; when the earthquake load vibrates in the horizontal direction and the vertical direction, the vibration in the horizontal direction can be buffered through the side groove, and the vertical vibration can be buffered through the anti-seismic gap h in the bottom of the embedded groove, the anti-seismic gasket arranged in the anti-seismic gap h and the damping telescopic rod arranged in the anti-seismic gap h.

Description

Technical Field

[0001] This invention relates to the field of bridge seismic resistance technology, and in particular to a seismic-resistant block. Background Technology

[0002] Earthquakes and vehicle loads both cause bridge deck vibrations, manifesting as elastic deformation and vibration response of the bridge structure. Vibration forms include lateral vibration, vertical vibration, and torsional vibration. Embedded bridge seismic blocks are mainly used to enhance the seismic resistance of bridges. By setting seismic blocks, the components of the seismic impact force are weakened, the relative displacement of the beams and the transmission of vibrations in the bridge are limited, thereby improving the seismic performance of the bridge and the stability of the bridge road surface. Earthquake vibrations originate from seismic waves, with large amplitudes and short durations. Earthquake vibrations are multi-directional, including horizontal and vertical directions, and may lead to serious damage such as the overall collapse of the bridge, support failure, and beam collapse. Vehicle loads are caused by vehicle movement, with smaller amplitudes and relatively longer durations. Vehicle load vibrations are mainly vertical, and long-term effects may lead to cumulative damage such as fatigue damage and crack propagation. An embedded bridge seismic damping block disclosed in Chinese patent CN201921755095.2 describes a type of embedded bridge seismic damping block. When the bridge beam moves left and right, the damping block pushes the damping block to both sides. The movement of the damping block to both sides causes the top block to push upward and compress the spring, thus decomposing the lateral component of the earthquake force into lateral force and vertical force. The vertical force is weakened by the elastic force generated by the deformation of the spring. The decomposed lateral force of the earthquake causes the top plate to push the top plate. However, this embedded bridge seismic damping block is mainly used for damping vibrations caused by earthquakes, and it cannot effectively dampen vibrations caused by automobiles on the bridge surface. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an embedded bridge anti-seismic block that effectively solves the problem of insufficient vibration reduction effect of existing anti-seismic blocks on bridge deck vibration caused by vehicle loads.

[0004] The objective of this invention is achieved through the following technical solution: an embedded bridge seismic blocking block, comprising a bridge pavement, wherein a plurality of embedding grooves are formed on the top of the bridge pavement, and seismic blocking blocks are disposed in the embedding grooves. A seismic gap h is provided between the seismic blocking blocks and the embedding grooves, wherein the seismic gap h is greater than the vertical displacement y(x, t) of the bridge; the vertical displacement y(x, t) of the bridge is the displacement of the bridge structure in the vertical direction caused by vehicle loads. According to the modal superposition method, a linear combination expression for the vertical displacement y(x, t) of the bridge is obtained: ② in: Let L be the mode shape of a simply supported beam of length L, which is dimensionless. Let: the generalized coordinates of the mode shape, dimensionless; An anti-seismic pad is installed inside the seismic gap h, and several damping telescopic rods are fixedly connected to the bottom of the embedded groove.

[0005] Furthermore, the bottom width of the embedding groove is smaller than the top width, the shape of the anti-vibration block is adapted to the shape of the embedding groove, and the shape of the embedding groove is adapted to its bottom shape.

[0006] Furthermore, a number of support plates are fixedly connected to the top of the embedded groove, and a number of fan-shaped protrusions are fixedly connected to the top of the anti-seismic block. The fan-shaped protrusions are located between the gaps of the support plates, and the top height of the fan-shaped protrusions is higher than the top height of the bridge pavement.

[0007] Furthermore, side grooves are provided on both sides of the top of the embedding groove, and extension plates are fixedly connected to both sides of the anti-vibration block. The extension plates are located at the top inside the side grooves, and the two sides of the anti-vibration pads are located at the bottom inside the side grooves.

[0008] Furthermore, the anti-vibration pad is made of vulcanized rubber, and in a non-stressed state, the anti-vibration pad is in contact with the top of the anti-vibration block and the bottom of the support plate, respectively.

[0009] Optionally, the bottom of the anti-seismic block is provided with several circular grooves, and the damping telescopic rod is installed inside the circular grooves. A compression spring is sleeved on the outside of each damping telescopic rod, and the elastic force of the compression spring is greater than 100 Newtons.

[0010] Furthermore, the seismic blocks are used to resist vehicle loads and seismic loads on the bridge pavement.

[0011] The present invention has the following advantages: 1. This embedded bridge seismic blocking block, by setting a seismic gap h between the seismic blocking block and the embedded groove, and calculating the vertical displacement y(x, t) of the bridge according to the actual use environment, and setting the seismic gap h to be greater than the vertical displacement y(x, t) of the bridge, alleviates the vertical displacement caused by vehicle load, and reduces the cumulative damage such as fatigue damage and crack propagation of the bridge pavement. 2. This embedded bridge seismic blocking block, by setting an embedded groove and seismic blocking block on the bridge road surface, can transmit the vibration generated by the bridge road surface to the seismic pad, which can buffer the vibration and reduce the impact of the vibration on the bridge. It can also reduce the impact of vehicle vibration on the bridge road surface. By setting a fan-shaped protrusion on the top of the seismic blocking block, when a vehicle passes over it, it can press on the fan-shaped protrusion, transmitting the vibration to the seismic pad and damping telescopic rod below the seismic blocking block, which can buffer the vibration generated by the vehicle. In addition, the fan-shaped protrusion on the bridge road surface can also act as a speed bump, limiting the speed of vehicles on the bridge road surface. 3. This embedded bridge seismic blocking block, by setting side grooves on both sides of the embedded groove, allows the extension plate to contact the top of the road surface within the side grooves. The vibration transmitted from the road surface is transmitted to the seismic blocking block through the extension plate. The seismic pads and damping telescopic rods below assist in the seismic buffering effect. The side grooves also have two gaps in the horizontal direction. When encountering horizontal and vertical vibrations under seismic loads, the side grooves can buffer the horizontal vibration, and the seismic gap h at the bottom of the embedded groove and the seismic pads and damping telescopic rods installed therein can buffer the vertical vibration. By setting seismic pads made of vulcanized rubber at the bottom of the seismic blocking block, the vulcanized rubber has good performance and can quickly consume the kinetic energy of the vibration during the buffering process, thus achieving the effect of seismic damping. 4. This embedded bridge seismic blocking block, by setting a damping telescopic rod and a compression spring below the seismic blocking block, allows the damping telescopic rod to quickly reciprocate when the seismic blocking block is subjected to vibration, thereby consuming the kinetic energy of the transmitted vibration, reducing the impact of bridge road vibration on the beam, and improving the stability and seismic resistance of the bridge. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A; Figure 4 For the present invention Figure 2 Enlarged structural diagram at point B; Figure 5 This is a schematic diagram of the exploded structure of the present invention; Figure 6 For the present invention Figure 5 A magnified structural diagram at point C.

[0013] In the diagram: 1-bridge pavement, 2-embedded groove, 3-seismic block, 4-seismic pad, 5-damping telescopic rod, 6-support plate, 7-fan-shaped protrusion, 8-side groove, 9-extension plate, 10-circular groove, 11-compression spring. Detailed Implementation

[0014] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0015] like Figures 1 to 6 As shown, an embedded bridge seismic block includes a bridge pavement 1. Several embedded grooves 2 are formed on the top of the bridge pavement 1. Seismic blocks 3 are installed in the embedded grooves 2. A seismic gap h is provided between the seismic blocks 3 and the embedded grooves 2. The seismic gap h is greater than the vertical displacement y(x,t) of the bridge caused by the vehicle load on the bridge deck. Without considering wind load, the vertical displacement y(x,t) of the bridge is the vertical displacement of the bridge structure caused by the vehicle load. For ease of calculation, the vehicle load is mainly a moving vehicle load, but it is simplified to a concentrated vehicle load. The vehicle load referred to below is the concentrated vehicle load. Let the vehicle load size be P(t); the vehicle load moving speed be v; the cross-section of the simply supported beam of length L be a uniform cross-section; the linear density be m; and the bridge damping coefficient be c. The equation of motion of the bridge under the action of the moving vehicle load is: ① Where: y(x, t) is the vertical displacement of the bridge, in meters (m); δ is the Dirac function, dimensionless; P(t) is the vehicle load, in Pa; v is the vehicle load speed, in m / s; E is the elastic modulus of the bridge deck, in gigapa (GPa); and I is the moment of inertia of the cross section, in meters (m). 4 m is the linear density, in g / m; c is the damping coefficient of the bridge, in kg / s. The modal superposition method utilizes the modal characteristics of a structure to express the dynamic response of the system as a linear combination of the various modes. Based on this method, equation ① is solved to obtain the linear combination expression for the vertical displacement y(x, t) of the bridge: ② in: Let L be the mode shape of a simply supported beam of length L, which is dimensionless. Let: the generalized coordinates of the mode shape, dimensionless; An anti-seismic pad 4 is installed inside the seismic gap h, and several damping telescopic rods 5 are fixedly connected to the bottom of the embedded groove 2.

[0016] like Figure 2 As shown, the bottom width of the embedded groove 2 is smaller than the top width. The shape of the anti-vibration block 3 is adapted to the shape of the embedded groove 2, and the shape of the embedded groove 2 is adapted to the bottom shape of the embedded groove 2. By setting the embedded groove 2 and the anti-vibration block 3 on the bridge road surface 1, the anti-vibration block 3 can transmit the vibration generated by the bridge road surface to the anti-vibration pad 4. The anti-vibration pad 4 can buffer the vibration, reduce the impact of vibration on the bridge, and reduce the impact of vehicle vibration on the bridge road surface.

[0017] like Figure 2-4 As shown, several support plates 6 are fixedly connected to the top of the embedded groove 2, and several fan-shaped protrusions 7 are fixedly connected to the top of the anti-vibration block 3. The fan-shaped protrusions 7 are located between the gaps of the support plates 6. The top height of the fan-shaped protrusions 7 is higher than the top height of the bridge road surface 1. By setting the fan-shaped protrusions 7 on the top of the anti-vibration block 3, when a vehicle passes over, it can press on the fan-shaped protrusions 7, transmitting the vibration to the anti-vibration pads 4 and damping telescopic rods 5 below the anti-vibration block 3, thus buffering the vibration generated by the vehicle. In addition, the fan-shaped protrusions 7 on the bridge road surface 1 can act as speed bumps, limiting the speed of the vehicle on the bridge road surface.

[0018] like Figure 4-6 As shown, side grooves 8 are provided on both sides of the top of the embedded groove 2. Extension plates 9 are fixedly connected to both sides of the seismic block 3. The extension plates 9 are located at the top inside the side grooves 8, and the two sides of the seismic pads 4 are located at the bottom inside the side grooves 8. By setting the side grooves 8 on both sides of the embedded groove 2, the extension plates 9 can contact the top of the bridge road surface 1 inside the side grooves 8, and the vibration of the vehicle load transmitted by the bridge road surface 1 is transmitted to the seismic block 3 through the extension plates 9. The seismic pads 4 below and the damping telescopic rods 5 assist in the seismic buffering effect. The side grooves 8 also have two gaps in the horizontal direction. When encountering horizontal and vertical vibrations of seismic loads, the horizontal vibration can be buffered through the side grooves 8, and the vertical vibration can be buffered through the seismic gap h at the bottom of the embedded groove 2 and the seismic pads 4 and the damping telescopic rods 5 installed inside.

[0019] like Figure 4 As shown, the anti-vibration pad 4 is made of vulcanized rubber. The anti-vibration pad 4 is attached to the top of the anti-vibration block 3 and the bottom of the support plate 6 respectively. By setting the anti-vibration pad 4 made of vulcanized rubber at the bottom of the anti-vibration block 3, the vulcanized rubber has good performance and can quickly consume the vibration kinetic energy during the buffering process, so as to play the role of anti-vibration and vibration reduction.

[0020] like Figure 3 As shown, the bottom of the seismic block 3 has several circular grooves 10, and the damping telescopic rods 5 are set inside the circular grooves 10. The outer side of each damping telescopic rod 5 is fitted with a compression spring 11. The elastic force of the compression spring 11 is greater than 100 Newtons. By setting the damping telescopic rods 5 and compression springs 11 below the seismic block 3, when the seismic block 3 is subjected to vibration, the damping telescopic rods 5 can quickly reciprocate and extend, consuming the kinetic energy of the transmitted vibration, reducing the impact of bridge road vibration on the beam, and improving the stability and seismic resistance of the bridge.

[0021] In actual implementation, the seismic blocking block 3 is used to resist vehicle loads and seismic loads on the bridge pavement 1.

[0022] The working principle of this invention is as follows: S1. An embedded groove 2 and a seismic block 3 are provided on the bridge road surface 1. The seismic block 3 can transmit the vibration generated by the bridge road surface to the seismic pad 4. The seismic pad 4 can buffer the vibration and reduce the impact of vehicle load and seismic load vibration on the bridge road surface 1. S2. A fan-shaped protrusion 7 is set on the top of the anti-vibration block 3. When a vehicle passes over it, it can press on the fan-shaped protrusion 7 and transmit the vibration to the anti-vibration pad 4 and the damping telescopic rod 5 below the anti-vibration block 3, which can buffer the vibration generated by the vehicle. In addition, the fan-shaped protrusion 7 on the bridge road surface 1 can act as a speed bump to limit the speed of the vehicle on the bridge road surface.

Claims

1. An embedded bridge seismic-resistant block, characterized in that: The bridge pavement includes a bridge surface with several embedded grooves at its top. Seismic blocks are installed in these grooves, and a seismic gap h is provided between the seismic blocks and the embedded grooves. This seismic gap h is greater than the bridge's vertical displacement y(x, t). The bridge's vertical displacement y(x, t) is the vertical displacement of the bridge structure caused by vehicle loads. Using the modal superposition method, a linear combination expression for the bridge's vertical displacement y(x, t) is obtained: ② in: Let L be the mode shape of a simply supported beam of length L, which is dimensionless. Let: the generalized coordinates of the mode shape, dimensionless; An anti-seismic pad is installed inside the seismic gap h, and several damping telescopic rods are fixedly connected to the bottom of the embedded groove.

2. The embedded bridge seismic blocking block according to claim 1, characterized in that: The bottom width of the embedded groove is smaller than the top width, the shape of the anti-vibration block is adapted to the shape of the embedded groove, and the shape of the embedded groove is adapted to its bottom shape.

3. The embedded bridge seismic blocking block according to claim 2, characterized in that: The top of the embedded groove is fixedly connected to several support plates, and the top of the anti-seismic block is fixedly connected to several fan-shaped protrusions. The fan-shaped protrusions are located between the gaps of the support plates, and the top height of the fan-shaped protrusions is higher than the top height of the bridge pavement.

4. The embedded bridge seismic blocking block according to claim 3, characterized in that: Side grooves are provided on both sides of the top of the embedded groove. Extension plates are fixedly connected to both sides of the anti-vibration block. The extension plates are located at the top inside the side grooves, and the two sides of the anti-vibration pads are located at the bottom inside the side grooves.

5. The embedded bridge seismic blocking block according to claim 4, characterized in that: The anti-vibration pad is made of vulcanized rubber. When not under stress, the anti-vibration pad is attached to the top of the anti-vibration block and the bottom of the support plate, respectively.

6. The embedded bridge seismic blocking block according to claim 1, characterized in that: The bottom of the anti-seismic block is provided with several circular grooves, and the damping telescopic rod is provided inside the circular groove. A compression spring (11) is sleeved on the outside of the damping telescopic rod, and the elastic force of the compression spring is greater than 100 Newtons.

7. The embedded bridge seismic blocking block according to any one of claims 1-6, characterized in that: The seismic blocks are used to resist vehicle loads and seismic loads on the bridge surface.

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