Method for quickly repairing reinforced concrete piers after earthquake

Abstract

The invention discloses a method for quickly repairing reinforced concrete piers after an earthquake, and belongs to the field of civil engineering. According to the method, a bearing platform, piers,high fluidity early strength cement mortar, stainless steel sleeves, energy dissipation angle steel, SMA combined ring springs, horizontal screws, vertical screws, high strength bolts, longitudinal reinforcement and polytetrafluoroethylene films are included. The idea of the method is to change the piers consolidated at original pier bases into swing piers. When repairing is carried out, damagedconcrete is removed first, and the longitudinal reinforcement in a plastic hinge area is cut off at the bottoms of the piers. The plastic hinge area is covered with the stainless steel sleeves, and the high fluidity early strength cement mortar is poured into the sleeve. The energy dissipation angle steel and the SMA combined ring springs form an external energy dissipation system. The method is simple in construction operation and short in required time, the repaired piers become swing systems, and thus re-damage of the repaired piers under strong earthquake is avoided. The stainless steel sleeves significantly improve the durability of repaired bridge piers. The external energy dissipation system has a self-resetting function, the damage of the angle steel is avoided, and the external energy dissipation system is simple and 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 the following problems exist: (1) The earthquake resistance of repaired bridge piers is weak, and it is easy to cause 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 maintenance of the traffic lifeline after the earthquake

(3) The repaired bridge piers have poor durability and become temporary buildings, which need to be demolished and rebuilt shortly after the repair

[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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