A rapid repair method for reinforced concrete bridge piers after earthquakes

Abstract

The invention discloses a quick repair method for a reinforced concrete bridge pier after an earthquake, which belongs to the field of civil engineering. It is composed of caps, piers, high-fluidity early-strength cement mortar, stainless steel casing, energy-dissipating angle steel, SMA combined ring spring, horizontal screw, vertical screw, high-strength bolts, longitudinal reinforcement, and PTFE film. The idea of ​​this method is to change the pier consolidated at the bottom of the original pier into a swinging pier. When repairing, first remove the damaged concrete, and cut off the longitudinal reinforcement in the plastic hinge area at the bottom of the pier. The plastic hinge area is outsourced with stainless steel sleeves and filled with high-fluidity early-strength cement mortar in the sleeves. The energy-dissipating angle steel and the SMA combined ring spring form the external energy-dissipating system. The construction operation of this method is simple and the required time is short, and the repaired bridge pier becomes a swing system, which avoids re-damage of the repaired bridge pier under strong earthquakes. The stainless steel casing significantly improved the durability of the repaired piers. The external energy consumption system has a self-resetting function, which avoids the damage of the angle steel and is easy to repair.

Description

technical field [0001] The invention relates to a post-earthquake repaired reinforced concrete bridge pier, in particular to a post-earthquake repaired reinforced concrete bridge pier based on a swaying force mechanism and an external energy dissipation device. Background technique [0002] Reinforced concrete bridge piers are the main anti-lateral force components of bridge engineering. The earthquake damage of previous major earthquakes at home and abroad shows that reinforced concrete bridge piers are easily damaged under strong earthquakes, which will not only cause serious economic losses and casualties, but also seriously affect The timely development of disaster relief work after the earthquake has aggravated the earthquake disaster. [0003] Quickly repairing the damaged bridge piers after the earthquake can not only save the cost of repairing and rebuilding, but more importantly, quickly restore the traffic lifeline project and ensure the timely development of emerg...

AI Technical Summary

Problems solved by technology

Unfortunately, there are very few researches on post-earthquake repair technology of bridge piers at home and abroad, and there are the following problems: 1. The repaired bridge piers have weak earthquake resistance and are prone to more serious damage in the next earthquake

2 It takes a long time to repair the bridge pier, which does not meet the requirements of rapid traffic lifeline after the earthquake

3 The bridge piers after restoration have poor durability and become temporary buildings, which need to be demolished and rebuilt shortly after restoration

[0004] Based on the above background, reinforced concrete bridge piers are prone to damage under strong earthquakes, which seriously affects the development of emergency rescue work after the earthquake.

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