High-damping rubber-hourglass profile steel support combined energy consumption structure and method

Abstract

The invention discloses a high-damping rubber-hourglass profile steel support combined energy dissipation structure which comprises a connecting base, a supporting mechanism and an energy dissipation mechanism. The connecting seat comprises a left connecting seat and a right connecting seat; the supporting mechanism and the energy consumption mechanism are mounted between the left connecting seat and the right connecting seat; the two sides of the supporting mechanism are fixedly connected with the pier column and the straining beam through a left connecting base and a right connecting base respectively. Under the action of an earthquake, mutual dislocation of the straining beams and the piers drives mutual dislocation of the connecting seats, and the energy dissipation mechanisms can absorb transverse load energy dissipation and longitudinal load energy dissipation; the earthquake response of the whole bridge is reduced, the straining beam is protected against damage, damage is concentrated on the energy dissipation structure, the energy dissipation structure can be replaced after being damaged, the sustainable working performance of the straining beam and the pier is guaranteed, the defects that in a traditional pier-straining beam system, the straining beam is prone to shear damage, and the energy dissipation capacity of the pier is insufficient are overcome, and the energy dissipation performance of the bridge is improved. And moreover, quick replacement of the energy-consuming component can be realized, and daily maintenance and post-earthquake rescue work are facilitated.

Description

technical field [0001] The invention relates to the field of bridge engineering, in particular to a high-damping rubber-hourglass steel support combined energy-dissipating structure and a construction method. Background technique [0002] Due to the mountainous and hilly landforms in China, highway and railway lines often cross deep mountains and canyons. Most of the bridges in these areas have the characteristics of high pier and tie beams. The lateral stiffness of the double-column pier is improved by using tie beams to improve its stability. To improve the bearing capacity of the double-column pier. At the same time, our country is located between multiple seismic fault zones and is extremely vulnerable to earthquakes. Especially the southwest region is a high-intensity area with large terrain fluctuations. Once subjected to earthquake loads, the damage to the bridge structure will be devastating. It can be seen from several earthquakes that have occurred in my country b...

AI Technical Summary

Problems solved by technology

[0004] The first is a metal damper. A metal damper is added at the connection position between the tie beam and the pier column, and the damage is concentrated on the position of the metal damper, which effectively protects the tie beam from damage. This method is simple to connect and easy to disassemble. It is convenient, but it needs to produce large deformation at the pier column-tie beam position, so as to give full play to the characteristics of energy consumption of metal damper yield deformation;

[0005] The second type is a friction damper, such as rubber, steel plate, etc., which uses the mutual extrusion and friction between different materials to generate energy consumption, and converts relative slippage into heat energy release, so as to achieve energy consumption and reduce structural damage. , the mechanical model of this connection structure is simple and the cost is low, but when the late deformation is large and the heat is high, problems such as reduced friction contact surface and difficult friction control are likely to occur;

[0006] The third is to set up auxiliary anti-buckling supports. The cast-in-place structure is still used at the connection position between the pier column and the tie beam, and the anti-buckling supports are arranged obliquely around the pier column-tie beam, and the deformation of the anti-buckling supports is used to generate energy consumption and protect the pier columns - The tie beams do not undergo major damage. This connection method has stable seismic performance, but the structure is relatively complex, and it should be arranged in places with relatively large displacements, requiring a large layout space

[0007] In order to solve the seismic performance of the pier-column-to-beam connection structure and maintain the continuous operation of the tie-beam, it is urgent to propose a pier-column-to-beam connection energy-dissipating structure suitable for double-column piers in high-intensity areas, which can concentrate the damage on the In terms of energy-dissipating structure, it can avoid the premature damage of the tie beam, which will affect the overall safety of the double-column pier. It can also facilitate the disassembly of the energy-dissipating structure after damage occurs, realize the ability to be replaced and reassembled, and maintain the long-term stable service performance of the tie beam

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