CN121496830A - An embedded bridge seismic blocking block - Google Patents

Abstract

The invention relates to the technical field of bridge earthquake resistance, in particular to an earthquake-resistant stop block, which comprises a bridge pavement, wherein a plurality of embedded grooves are formed in the top of the bridge pavement, an earthquake-resistant stop block is arranged in each embedded groove, an earthquake-resistant gap h is formed between each earthquake-resistant stop block and each embedded groove, the earthquake-resistant gap h is larger than the vertical displacement y of the bridge, earthquake-resistant gaskets are arranged in each earthquake-resistant gap h, side grooves are formed in two sides of each embedded groove, an extension plate can be in contact with the top of the pavement in each side groove, vibration conducted by the pavement is conducted to each earthquake-resistant stop block through the corresponding extension plate, an earthquake-resistant buffering effect is achieved by the aid of the corresponding earthquake-resistant gaskets and damping telescopic rods below, two gaps are formed in the side grooves in the horizontal direction, and when the horizontal and vertical vibration of earthquake load are met, the vibration in the horizontal direction can be buffered through the side grooves, and the vibration-resistant gaskets arranged at the bottom of the embedded grooves and the damping telescopic rods can be buffered.

Description

Embedded bridge anti-seismic stop block

Technical Field

The invention relates to the technical field of bridge earthquake resistance, in particular to an earthquake-resistant stop block.

Background

The vibration of the bridge deck is caused by the earthquake and the vehicle load, the vibration is represented by elastic deformation and vibration response of a bridge structure, the vibration forms comprise transverse vibration, vertical vibration, torsional vibration and the like, the embedded bridge anti-vibration stop block is mainly used for enhancing the anti-vibration capability of the bridge, the component force of the earthquake impact force is weakened by arranging the anti-vibration stop block, the relative displacement of a beam body and the vibration conduction of the bridge are limited, so that the anti-vibration performance of the bridge and the stability of a bridge pavement are improved, the earthquake vibration is derived from earthquake waves, the vibration amplitude is larger, the vibration duration is shorter, the earthquake vibration is multidirectional, the vibration comprises horizontal direction and vertical direction, the integral collapse of the bridge, the support failure, the Liang Tila beam and other serious damages are possibly caused by the vehicle running, the vibration amplitude is smaller, the vibration duration is relatively longer, and the long-term effect of the vehicle load vibration is mainly vertical, and the cumulative damages such as fatigue damage and crack expansion are possibly caused;

the embedded bridge anti-seismic stop disclosed in China patent CN201921755095.2 pushes the shock-absorbing block to two sides when the embedded bridge anti-seismic stop moves to the right at Liang Tizuo, the shock-absorbing block moves to two sides and pushes the top block upwards to compress the spring, the horizontal component force of an earthquake is decomposed into horizontal force and vertical force, the vertical force is weakened under the elasticity generated by the deformation of the spring, the decomposed horizontal force of the earthquake can lead the top plate to push the poking plate at the top, but the embedded bridge anti-seismic stop is mainly used for shock absorption of the earthquake and the like, and an automobile cannot play an effective shock absorption role on the vibration generated by the bridge deck.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, provides an embedded bridge anti-seismic stop block, and effectively solves the problem that the anti-seismic stop block in the prior art has insufficient bridge deck vibration damping effect on automobile load.

The embedded bridge anti-seismic stop block comprises a bridge pavement, wherein a plurality of embedded grooves are formed in the top of the bridge pavement, anti-seismic stop blocks are arranged in the embedded grooves, anti-seismic gaps h are formed between the anti-seismic stop blocks and the embedded grooves, the anti-seismic gaps h are larger than the vertical displacement y (x, t) of a bridge, the vertical displacement y (x, t) of the bridge is the displacement of a bridge structure in the vertical direction caused by vehicle load, and a linear combination expression of the vertical displacement y (x, t) of the bridge is obtained according to a vibration type superposition method:

②

wherein: The vibration mode of the simply supported beam with the length L is dimensionless; The method is characterized by comprising generalized coordinates of a vibration mode and dimensionless;

And a plurality of damping telescopic rods are fixedly connected to the bottom of the embedded groove.

Further, the bottom width of the embedded groove is smaller than the top width, the shape of the anti-seismic stop block is matched with the shape of the embedded groove, and the shape of the embedded groove is matched with the shape of the bottom of the embedded groove.

Further, a plurality of backup pads are fixedly connected with at the top of embedded groove, the top fixedly connected with of antidetonation dog is a plurality of fan-shaped archs, fan-shaped protruding being located between the clearance of backup pad, fan-shaped bellied top height is higher than the top height on bridge road surface.

Further, side grooves are formed in two sides of the top of the embedded groove, extension plates are fixedly connected to two sides of the anti-seismic stop block and located at the top of the inside of the side grooves, and two sides of the anti-seismic gasket are located at the bottom of the inside of the side grooves.

Further, the material of antidetonation gasket is vulcanized rubber, when not atress state, antidetonation gasket respectively with antidetonation dog top the bottom of backup pad is laminated mutually.

Optionally, a plurality of circular grooves are formed in the bottom of the anti-seismic stop block, the damping telescopic rods are arranged in the circular grooves, compression springs are sleeved on the outer sides of the damping telescopic rods, and the elasticity of the compression springs is greater than one hundred newtons.

Further, the shock-resistant stop is used for shock resistance of vehicle loads and seismic loads of the bridge pavement.

The invention has the following advantages:

1. According to the embedded bridge anti-seismic stop block, the anti-seismic gap h is arranged between the anti-seismic stop block and the embedded groove, the vertical displacement y (x, t) of the bridge is calculated according to the actual use environment, and the anti-seismic gap h is set to be larger than the vertical displacement y (x, t) of the bridge, so that the vertical displacement caused by automobile load is relieved, and the cumulative damage such as fatigue damage, crack expansion and the like of the bridge pavement is reduced;

2. this embedded bridge antidetonation dog through setting up embedded groove and antidetonation dog on the bridge road surface, the antidetonation dog can be with the vibrations that the bridge road surface produced conduction to the antidetonation gasket on, the antidetonation gasket can play the effect of buffering vibrations, reduce the influence of vibrations to the bridge, can reduce the influence of vehicle vibrations to the bridge road surface, through setting up fan-shaped arch at the top of antidetonation dog, can press on fan-shaped arch when the vehicle passes through, on the antidetonation gasket and the damping telescopic link below with vibrations conduction to the antidetonation dog, play the buffering effect to the vibrations that the vehicle produced, and fan-shaped arch on the bridge road surface can play the effect of deceleration strip, restriction vehicle speed on the bridge road surface;

3. According to the embedded bridge anti-seismic stop block, the side grooves are formed in the two sides of the embedded groove, so that the extending plate can be in contact with the top of a road surface in the side grooves, vibration conducted by the road surface is conducted to the anti-seismic stop block through the extending plate, an anti-seismic gasket and a damping telescopic rod below assist in playing a role in anti-seismic buffering, two gaps are formed in the side grooves in the horizontal direction, when the horizontal direction and the vertical vibration of an earthquake load are met, the vibration in the horizontal direction can be buffered through the side grooves, and the vertical vibration can be buffered through the anti-seismic gap h at the bottom of the embedded groove and the anti-seismic gasket and the damping telescopic rod arranged in the anti-seismic gap h;

4. This embedded bridge antidetonation dog through setting up damping telescopic link and compression spring in the below of antidetonation dog, when antidetonation dog received vibrations, damping telescopic link can reciprocate fast and stretch out and draw back, consumes the kinetic energy of transmission vibrations, reduces the influence of bridge road surface vibrations to the roof beam body, improves the stability and the shock resistance of bridge.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a schematic cross-sectional view of the present invention;

FIG. 3 is an enlarged schematic view of the structure of FIG. 2A according to the present invention;

FIG. 4 is an enlarged schematic view of the structure of FIG. 2B according to the present invention;

FIG. 5 is a schematic diagram of an exploded construction of the present invention;

fig. 6 is an enlarged schematic view of the structure of fig. 5C according to the present invention.

In the figure, the bridge comprises a bridge pavement, a 2-embedded groove, a 3-anti-seismic stop block, a 4-anti-seismic gasket, a 5-damping telescopic rod, a 6-supporting plate, a 7-fan-shaped bulge, an 8-side groove, a 9-extending plate, a 10-round groove and an 11-compression spring.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.

As shown in fig. 1 to 6, an embedded bridge anti-seismic block comprises a bridge pavement 1, wherein a plurality of embedded grooves 2 are formed in the top of the bridge pavement 1, anti-seismic blocks 3 are arranged in the embedded grooves 2, anti-seismic gaps h are arranged between the anti-seismic blocks 3 and the embedded grooves 2 and are larger than vertical displacement y (x, t) of a bridge generated under the influence of bridge deck vehicle load, the vertical displacement y (x, t) of the bridge is displacement of a bridge structure in the vertical direction caused by the vehicle load under the condition that the wind load is not considered, the vehicle load is conveniently calculated, but is simplified into a concentrated vehicle load, namely, the concentrated vehicle load is formed by simplifying the vehicle load, the vehicle load moving speed is v, the cross section of a simply supported beam with the length of L is equal cross section, the line density is m, the damping coefficient of the bridge is c, and the motion equation of the bridge under the vehicle moving effect is formed by the vehicle load:

①

The bridge vibration damping device comprises a bridge, a damping coefficient sensor, a bridge, a damping sensor, a sensor and a sensor, wherein y (x, t) is the vertical displacement of the bridge, the unit is m, delta is a Dirac function, the dimensionless, P (t) is the vehicle load, the unit is Pa, v is the vehicle load moving speed, the unit is m/s, E is the elastic modulus of the bridge deck, the unit is GPa, I is the section moment of inertia, the unit is m ⁴, the unit is linear density, the unit is g/m, and the unit is kg/s;

the vibration mode superposition method is to use the vibration mode characteristics of the structure to express the dynamic response of the system as the linear combination of the vibration modes, and solve the formula ① according to the vibration mode superposition method to obtain the linear combination expression of the vertical displacement y (x, t) of the bridge:

②

wherein: The vibration mode of the simply supported beam with the length L is dimensionless; The method is characterized by comprising generalized coordinates of a vibration mode and dimensionless;

An anti-seismic gasket 4 is arranged in the anti-seismic gap h, and a plurality of damping telescopic rods 5 are fixedly connected to the bottom of the embedded groove 2.

As shown in fig. 2, the width of the bottom of the embedded groove 2 is smaller than the width of the top, the shape of the anti-vibration stop block 3 is matched with the shape of the embedded groove 2, the shape of the embedded groove 2 is matched with the shape of the bottom of the embedded groove 2, the anti-vibration stop block 3 is arranged on the bridge pavement 1, vibration generated by the bridge pavement can be conducted onto the anti-vibration gasket 4 through the anti-vibration stop block 3, the anti-vibration gasket 4 can play a role in buffering vibration, the influence of vibration on the bridge is reduced, and the influence of vehicle vibration on the bridge pavement can be reduced.

As shown in fig. 2-4, the top fixedly connected with a plurality of backup pads 6 of embedded groove 2, the top fixedly connected with of antidetonation dog 3 is a plurality of fan-shaped protruding 7, fan-shaped protruding 7 is located between the clearance of backup pad 6, the top height of fan-shaped protruding 7 is higher than the top height of bridge road surface 1, through setting up fan-shaped protruding 7 at the top of antidetonation dog 3, can press on fan-shaped protruding 7 when the vehicle passes through, with on shock-resistant gasket 4 and the damping telescopic link 5 of vibrations conduction to antidetonation dog 3 below, play the cushioning effect to the vibrations that the vehicle produced, and fan-shaped protruding 7 on bridge road surface 1 can play the effect of deceleration strip, restriction vehicle is at the speed on bridge road surface.

As shown in fig. 4-6, the two sides of the top of the embedded groove 2 are provided with side grooves 8, the two sides of the shock-proof stop block 3 are fixedly connected with extension plates 9, the extension plates 9 are located at the top of the inside of the side grooves 8, the two sides of the shock-proof gasket 4 are located at the bottom of the inside of the side grooves 8, the side grooves 8 are arranged at the two sides of the embedded groove 2, so that the extension plates 9 can be in contact with the top of the bridge pavement 1 in the side grooves 8, the automobile load shock conducted by the bridge pavement 1 is conducted to the shock-proof stop block 3 through the extension plates 9, the shock-proof gasket 4 and the damping telescopic rod 5 below assist in playing the shock-proof buffering effect, and the side grooves 8 are also provided with two gaps in the horizontal direction.

As shown in fig. 4, the material of antidetonation gasket 4 is vulcanized rubber, antidetonation gasket 4 respectively with the top of antidetonation dog 3 and laminate mutually in the bottom of backup pad 6, through setting up the antidetonation gasket 4 of vulcanized rubber material in the bottom of antidetonation dog 3, vulcanized rubber has better performance, can consume vibration kinetic energy fast at the in-process of buffering vibrations, plays antidetonation absorbing effect.

As shown in fig. 3, a plurality of circular grooves 10 are formed in the bottom of the anti-seismic stop block 3, the damping telescopic rods 5 are arranged inside the circular grooves 10, compression springs 11 are sleeved on the outer sides of the damping telescopic rods 5, the elastic force of each compression spring 11 is greater than one hundred newtons, the damping telescopic rods 5 and the compression springs 11 are arranged below the anti-seismic stop block 3, when the anti-seismic stop block 3 is vibrated, the damping telescopic rods 5 can rapidly and reciprocally stretch out and draw back, kinetic energy of conduction vibration is consumed, influence of bridge pavement vibration on a beam body is reduced, and stability and shock resistance of a bridge are improved.

In practical implementation, the anti-seismic block 3 is used for anti-seismic of the vehicle load and the seismic load of the bridge pavement 1.

The working principle of the invention is as follows:

S1, arranging an embedded groove 2 and an anti-seismic stop block 3 on a bridge pavement 1, wherein the anti-seismic stop block 3 can transmit vibration generated by the bridge pavement to an anti-seismic gasket 4, the anti-seismic gasket 4 can play a role in buffering vibration, and the influence of vehicle load and earthquake load vibration on the bridge pavement 1 is reduced;

s2, fan-shaped protrusions 7 are arranged at the top of the anti-seismic stop block 3, a vehicle can be pressed on the fan-shaped protrusions 7 when passing through, vibration is conducted to the anti-seismic gaskets 4 and the damping telescopic rods 5 below the anti-seismic stop block 3, the vibration generated by the vehicle is buffered, and the fan-shaped protrusions 7 on the bridge pavement 1 can play a role of a deceleration strip to limit the speed of the vehicle on the bridge pavement.

Claims (7)

1. An embedded bridge seismic blocking block, characterized in that: it includes a bridge pavement, the top of which is provided with a plurality of embedded grooves, each embedded groove being provided with a seismic blocking block, and a seismic gap h is provided between the seismic blocking block and the embedded groove, the seismic gap h being greater than the vertical displacement y(x, t) of the bridge; the vertical displacement y(x, t) of the bridge is the vertical displacement of the bridge structure caused by vehicle load, and a linear combination expression for the vertical displacement y(x, t) of the bridge is obtained according to the modal superposition method: 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 embedding groove is smaller than the top width, the shape of the seismic blocking block is adapted to the shape of the embedding groove, and the shape of the embedding groove is adapted to its bottom shape. 3. The embedded bridge seismic blocking block according to claim 2, characterized in that: a plurality of support plates are fixedly connected to the top of the embedding groove, and a plurality of fan-shaped protrusions are fixedly connected to the top of the seismic blocking 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 road surface. 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 embedding groove, extension plates are fixedly connected to both sides of the seismic blocking block, the extension plates are located at the top inside the side grooves, and the two sides of the seismic 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 seismic pad is made of vulcanized rubber, and in a non-stressed state, the seismic pad is respectively attached to the top of the seismic blocking block and the bottom of the support plate. 6. The embedded bridge seismic blocking block according to claim 1, characterized in that: the bottom of the seismic blocking block is provided with a plurality of circular grooves, the damping telescopic rod is provided inside the circular grooves, and a compression spring (11) is sleeved on the outer side of each of the damping telescopic rods, the elastic force of the compression spring being greater than one hundred Newtons. 7. The embedded bridge seismic blocking block according to any one of claims 1-6, characterized in that: the seismic blocking block is used for seismic resistance to vehicle loads and seismic loads on the bridge pavement.