A swinging self-resetting double-layer bridge bent pier based on energy-dissipating angle steel with vertical joints

Abstract

A swinging self-resetting dual-deck bridge bent pier based on energy-dissipation angle steel with vertical joints comprises a bent pier foundation, bottom-layer prefabricated concrete filled steel tube pier bodies arranged on the bent pier foundation and filled with self-compacting steel fiber reinforced concrete in a pouring mode, a bottom-layer prefabricated bent cap arranged at the top ends of the bottom-layer prefabricated concrete filled steel tube pier bodies, top-layer prefabricated pier bodies on the bent cap, a top-layer prefabricated bent cap arranged at the top ends of the top-layer prefabricated pier bodies, unbounded prestressed tendons penetrating through the bottom-layer prefabricated concrete filled steel tube pier bodies, the energy-dissipation angle steel with the vertical joints, bolts, steel square keys and the like. All the energy-dissipation angle steel with the vertical joints enables the bottom-layer prefabricated concrete filled steel tube pier bodies to be connected with the bent pier foundation and the bottom-layer prefabricated bent cap through the bolts, and the steel square keys are arranged at swinging joint portions. Under a strong earthquake, the bottom layer of the double-deck bent pier shakes, and the unbounded prestressed tendons provide self-resetting capability. Earthquake damage is concentrated in the energy-dissipation angle steel with the vertical joints, and the energy-dissipation angle steel with the vertical joints can be replaced when damaged after the earthquake and becomes fuses in the structure.

Description

technical field [0001] The invention relates to a novel bridge structure system, in particular to a double-layer bridge bent pier system in a double-layer viaduct bridge based on the fuse concept. Background technique [0002] The problem of urban traffic congestion is becoming more and more serious. Accelerating the construction of urban viaducts and giving full play to their three-dimensional traffic advantages is an important way to solve urban traffic problems. In this context, double-deck elevated bridges using double-deck bridge bent piers as the main load-bearing components have outstanding advantages in three-dimensional traffic systems and have broad application prospects in urban traffic system construction. [0003] The traditional double-layer bridge bent piers have two outstanding defects in the process of use. One is that the on-site construction has a great impact on the urban environment and traffic. The traffic channel is occupied for a long time; the secon...

AI Technical Summary

Problems solved by technology

[0003] The traditional double-layer bridge bent piers have two outstanding defects in the process of use. One is that the on-site construction has a great impact on the urban environment and traffic. Occupy the traffic channel for a long time; secondly, the traditional double-deck bridge bent piers have weak earthquake resistance, and are prone to damage and damage under strong earthquakes, and the residual displacement after the earthquake is large, which is not conducive to the rapid repair of the structure after the earthquake

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