CN111335140A - A shock-absorbing device and shock-absorbing method for an upper-supported concrete arch bridge arch structure - Google Patents

Abstract

The invention discloses a shock absorption device and a shock absorption method for an upper structure of an upper bearing type concrete arch bridge. The speed locker connects two adjacent beam pieces, the speed locker is used to connect all the beam pieces of the whole bridge in series to form an integral structure, the fixed supports are arranged at the bridge abutments at both ends, and the shock absorption method includes: A speed locker is installed at the bridge joint, and all the beam pieces of the whole bridge are connected in series to form an integral structure through the speed locker; fixed supports are arranged at the bridge abutments at both ends. The invention connects the upper arch structure into a whole through the speed locker, and rationally utilizes the structural rigidity of the entire bridge structure, thereby solving the problem of poor seismic performance of the upper arch structure of the upper-loaded concrete arch bridge, and is not only easy to operate, but also economical. , has good promotion value.

Description

A shock-absorbing device and shock-absorbing method for an upper-supported concrete arch bridge arch structure

technical field

The invention relates to the technical field of top-loaded concrete arch bridges, in particular to a shock-absorbing device and a shock-absorbing method for the upper-arch structure of a top-loaded concrete arch bridge.

Background technique

Traditional top-supported concrete arch bridges generally use reinforced concrete piers and simply supported beams or continuous beam structures. Due to the high structural rigidity of concrete arch bridges, with the increase of the span of the arch bridge, the height of the piers of this kind of upper arch structure increases, and the seismic performance also decreases. Especially when the main span of the arch bridge exceeds 400m, the maximum pier height of the bridge pier will reach nearly 100 meters, and the seismic performance of the upper structure of the arch becomes the decisive factor restricting the bridge scheme.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a shock absorption device and a shock absorption method for the upper structure of the upper bearing type concrete arch bridge in view of the problem of low seismic performance of the upper bearing type concrete arch bridge existing in the prior art.

In order to achieve the above object, the technical scheme adopted in the present invention is:

An upper-supported concrete arch bridge arch upper structure shock absorption device, comprising a plurality of speed lockers and a plurality of fixed supports, the speed lockers are arranged at the beam joints, and the speed lockers connect two adjacent beam pieces , the speed locker is used to connect all the beam pieces of the whole bridge in series to form an integral structure, and the fixed supports are arranged at the bridge abutments at both ends.

In the present invention, a speed lock is arranged at the beam joint, and fixed supports are arranged at the bridge abutments at both ends. The speed lock does not affect the expansion and contraction of the beam end under the action of conventional external forces (such as temperature force and braking force, etc.). When a strong longitudinal seismic force acts on the bridge, the speed lock will lock the longitudinal displacement of the beam joint, and The structure on the arch is connected in series to form a whole. At this time, the bridge pier with weak stiffness will use the bridge pier with high stiffness to improve its structural rigidity, reduce the seismic force on itself, and redistribute the seismic force among the piers of the whole bridge, eliminating the need for The weak link of the structure greatly improves the seismic performance of the entire structure.

As a preferred solution of the present invention, each of the beam pieces is connected to the bridge pier through the speed lock.

As a preferred solution of the present invention, at least two speed locks are fixedly installed at each of the bridge piers, wherein at least one of the speed locks is connected to one of the beam pieces; wherein at least one of the speed locks Connect another adjacent beam piece.

As a preferred solution of the present invention, one end of the speed locker is connected to one of the beam pieces, and the other end is connected to another adjacent beam piece.

As a preferred solution of the present invention, the fixed support is also provided at the arch upper pier with the highest rigidity, which is further conducive to the redistribution of seismic force.

The invention also discloses a shock absorption method for the upper structure of the upper bearing type concrete arch bridge, comprising the following steps:

A speed lock is installed at the bridge joint, and all the beam pieces of the whole bridge are connected in series to form an integral structure through the speed lock;

Set fixed supports at the bridge abutments at both ends.

The invention connects the upper arch structure into a whole through the speed locker, and rationally utilizes the structural rigidity of the entire bridge structure, thereby solving the problem of poor seismic performance of the upper arch structure of the top-loaded concrete arch bridge, which is not only easy to operate, but also economical. , has good promotion value.

As a preferred solution of the present invention, the shock absorption method further includes calculating the stiffness of each pier on the arch, and arranging a fixed bearing at the pier on the arch with the highest stiffness.

As a preferred solution of the present invention, at least two speed lockers are fixedly installed at the bridge pier, at least one speed locker is connected to a beam piece, and at least one speed locker is connected to another adjacent beam piece. connected.

As a preferred solution of the present invention, the two ends of the speed lock are respectively connected to two adjacent beam pieces.

To sum up, due to the adoption of the above-mentioned technical solutions, the beneficial effects of the present invention are:

In the present invention, a speed lock is arranged at the beam joint, and fixed supports are arranged at the bridge abutments at both ends. The speed lock does not affect the expansion and contraction of the beam end under the action of conventional external forces (such as temperature force and braking force, etc.). When a strong longitudinal seismic force acts on the bridge, the speed lock will lock the longitudinal displacement of the beam joint, and The structure on the arch is connected in series to form a whole. At this time, the bridge pier with weak stiffness will use the bridge pier with high stiffness to improve its structural rigidity, reduce the seismic force on itself, and redistribute the seismic force among the piers of the whole bridge, eliminating the need for The weak link of the structure greatly improves the seismic performance of the entire structure.

The invention connects the upper arch structure into a whole through the speed locker, and rationally utilizes the structural rigidity of the entire bridge structure, thereby solving the problem of poor seismic performance of the upper arch structure of the top-loaded concrete arch bridge, which is not only easy to operate, but also economical. , has good promotion value.

Description of drawings

FIG. 1 is a schematic view of the installation of the damping device for the upper structure of the upper support type concrete arch bridge according to the present invention.

FIG. 2 is a schematic view of the installation of the speed lock according to Embodiment 1 of the present invention.

FIG. 3 is a schematic view of the installation of the speed lock according to Embodiment 2 of the present invention.

Icons: 1-speed lock, 2-fixed support, 3-beam piece, 4-bridge pier, 41-arch pier, 42-partition pier, 43-ordinary pier, 5-abutment, 6-arch ring.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings.

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

Example 1

As shown in FIG. 1 , a top-loaded concrete arch bridge generally includes beams 3 , arch rings 6 , piers 4 and abutments 5 at both ends, wherein the piers 4 can be divided into arch piers arranged above the arch ring 6 . 41, the common bridge pier 43 erected directly on the foundation, and the demarcation pier 42.

This embodiment provides a shock absorption device for an upper structure of an upper bearing type concrete arch bridge, which includes a plurality of speed lockers 1 and a plurality of fixed supports 2 . The fixed supports 2 are installed at the bridge abutments 5 at both ends, and at the arch pier 41 with the greatest stiffness (obtained by simple structural stiffness calculation).

A plurality of the speed lockers 1 are used to connect all the beam pieces 3 of the whole bridge in series to form an integral structure. Specifically, at least one speed locker 1 is arranged at each beam seam, and the speed locker 1 Connect two adjacent beam pieces 3. Specifically, there can be the following two implementations:

As shown in Fig. 2, method 1: directly connect one end of the speed lock 1 to one of the beams 3, and the other end to connect the adjacent beams 3, so as to realize two adjacent beams Slice 3 in series.

As shown in FIG. 3 , method 2: two speed lockers 1 are fixedly arranged at the bridge pier 4 , one of the speed lockers 1 is connected to one of the beam pieces 3 , and the other speed lock 1 is connected Connect another adjacent beam piece 3 . That is, two adjacent beam pieces 3 are connected to the same bridge pier 4 , thereby realizing the series connection of two adjacent beam pieces 3 .

Example 2

As shown in Figure 1, a method for shock absorption of an upper structure of an upper-supported concrete arch bridge includes the following steps:

A speed lock 1 is installed at the bridge joint, and all the beam pieces 3 of the whole bridge are connected in series to form an integral structure through the speed lock 1;

Fixed supports 2 are arranged at the bridge abutments 5 at both ends and at the arch pier 41 with the greatest stiffness.

Specifically, through the speed locker 1, all the beam pieces 3 of the whole bridge are connected in series to form an integral structure, which can be realized in the following two ways:

As shown in FIG. 2 , method 1: connect the two ends of the speed lock 1 to two adjacent beam pieces 3 respectively, so as to realize the series connection of the two adjacent beam pieces 3 . The speed locks 1 are arranged everywhere, and all the beam pieces 3 of the whole bridge can be connected in series to form an integral structure.

As shown in Figure 3, method 2: two speed lockers 1 are fixedly installed at the bridge pier 4, one speed locker 1 is connected with a beam piece 3, and the other speed locker 1 is connected with the adjacent Another beam 3 is connected. That is, two adjacent beam pieces 3 are connected to the same bridge pier 4 , thereby realizing the series connection of two adjacent beam pieces 3 . By arranging the speed lock 1 at each beam joint, all the beam pieces 3 of the whole bridge can be connected in series to form an integral structure.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.

Claims (9)

1. The upper bearing type concrete arch bridge arch structure damping device is characterized by comprising a plurality of speed lockers and a plurality of fixed supports, wherein the speed lockers are arranged at beam joints and connected with two adjacent beam pieces, the speed lockers are used for connecting all the beam pieces of a whole bridge in series to form an integral structure, and the fixed supports are arranged at bridge abutments at two ends.

2. A concrete arch bridge deck according to claim 1, wherein each of said plurality of said segments is connected to a pier by said speed locker.

3. A structural damper of a deck-type concrete arch bridge according to claim 2, wherein at least two of said speed lockers are fixedly installed at each of said bridge piers, wherein at least one of said speed lockers is connected to one of said beam pieces; wherein at least one of said speed locks connects adjacent other of said beam segments.

4. A concrete arch bridge deck according to claim 1, wherein the speed locker is connected at one end to one of the beam pieces and at the other end to the adjacent other of the beam pieces.

5. A structural suspension system in an arch of a deck concrete arch bridge according to any one of claims 1 to 4, wherein said fixed support is also provided at the most rigid pier.

6. A method for damping a structure on an arch of a deck concrete arch bridge is characterized by comprising the following steps:

installing a speed locker at a bridge seam, and connecting all the beam pieces of the whole bridge in series to form an integral structure through the speed locker;

and fixed supports are arranged at the bridge abutments at the two ends.

7. The method of claim 6, further comprising calculating the stiffness of each arch pier and providing a fixed mount at the arch pier with the greatest stiffness.

8. A method for damping vibration of a superstructure of a deck-type concrete arch bridge according to claim 6 or 7, wherein at least two of the velocity locks are fixedly installed at a bridge pier, at least one of the velocity locks is connected to one of the girder pieces, and at least one of the velocity locks is connected to another adjacent girder piece.

9. A method for damping a superstructure according to claim 6 or 7, wherein both ends of said speed locker are connected to two adjacent beam pieces, respectively.

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