Self-resetting bridge pier column structure system with external graded energy dissipation devices and construction method

Abstract

The invention discloses a self-resetting bridge pier column structure system with external graded energy dissipation devices and a construction method. The self-resetting bridge pier column structuresystem comprises a pier and at least one group of graded energy dissipation devices. The periphery of the pier is coated with a pier embedded part and borne by a bridge abutment, and the bridge abutment is connected with the pier through unbonded prestressed reinforcing steel bars; the graded energy dissipation devices are symmetrically arranged outside the two side walls of the bridge pier and connected with the pier and the bridge abutment; and each graded energy dissipation device comprises a first energy dissipation piece and a second energy dissipation piece. The first energy dissipationpiece comprises a first connecting part which extends along the longitudinal direction of the pier; and at least one side of the first connecting part is provided with a plurality of energy dissipation plates arranged in the longitudinal direction. The second energy consumption piece comprises a second connecting part which extends along the longitudinal direction of the pier; a plurality of baffles corresponding to the energy dissipation plates are arranged on a second main body part; the multiple energy dissipation plates are arranged among the multiple baffles in a penetrating mode, and gaps are reserved between the energy dissipation plates and the baffles. The energy dissipation strength of the self-resetting bridge pier column structure system is enhanced, and the post-earthquake repair time and repair cost of the self-resetting bridge pier column structure system are reduced.

Description

technical field [0001] The invention belongs to the field of bridge engineering, and in particular relates to a self-resetting bridge pier structure system and a construction method with external grading energy-consuming devices. Background technique [0002] At present, the seismic design of bridges at home and abroad mainly adopts the concept of ductility design, which allows the pier to enter plasticity, and dissipates the seismic energy through concrete cracking and steel bar yielding in the plastic hinge area. The earthquake damage investigation shows that although the aseismic design based on the ductility of the bridge pier can ensure that the bridge is not prone to collapse in the earthquake, under the action of strong earthquakes, the plastic hinge area of ​​the bridge pier is severely damaged, and the bridge pier will produce excessive residual displacement. Due to the severe damage of traditional bridge piers under the action of strong earthquakes, it takes a long...

AI Technical Summary

Problems solved by technology

But at the same time, there are also some problems. Its ability to consume earthquake energy needs to be improved, and many energy-dissipating swinging pier foot concretes are severely damaged, which brings difficulties for seismic reinforcement.

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