Friction energy consumption type node connection device for self-centering pier column structure

Abstract

The invention relates to a friction energy consumption type node connection device for a self-centering pier column structure, which is a device used for connecting a bridge pier or a frame column with a pile cap (a foundation), so as to improve the energy consumption of the pier column structure under the action of earthquake and eliminate or reduce the residual deformation and the injuries of the structure. The device comprises a pier column strengthening steel plate, a foundation pre-embedded steel plate, an angle steel, a friction bolt, a friction plate, unbonded prestressed tendons, an anchor bolt and the like. The device can connect a concrete pier column and the foundation into a whole through the unbonded prestressed tendons which are vertically arranged. When the earthquake strength achieves a certain degree, the pier column-foundation contact surface is open, and the pier column can produce a certain rotation relative to the foundation. A friction device can dissipate earthquake energy through friction at this time, and the prestress provided by the prestressed tendons can recover the structure to the initial position after the earthquake. A pre-embedded part at the end part of the pier column is used for improving the local bearing pressure of the concrete when the pier column rotates relatively.

Description

technical field [0001] The invention is a connection device for frictional energy-dissipating self-centering piers and columns, which is used to dissipate earthquake energy, reduce damage to the main structure, and eliminate or reduce the damage of pier and column structures in earthquakes through vertically arranged prestressed tendons. Residual deformation under the action, thereby reducing the cost of post-earthquake repairs. Background technique [0002] Earthquake is one of the natural disasters faced by all mankind. Many strong earthquakes over the years have posed a serious threat to people's lives and property safety. Earthquake damage surveys at home and abroad show that for common pier structures, earthquake damage at the connection between the pier root and the cap is very common. Due to the complex force of the pier node area, under the action of earthquakes, this part often becomes one of the weakest links in the entire bridge system, which will cause large re...

AI Technical Summary

Problems solved by technology

[0005] Technical problem: In order to overcome the disadvantage of excessive residual deformation of the traditional cast-in-place pier-column structure under earthquake action, the present invention provides a self-centering pier-column structure node connection device with simple design, convenient processing and remarkable effect, which can effectively Minimize the residual deformation of the structure under the earthquake and reduce the cost of post-earthquake repairs

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