Connecting mode and structure of reinforced concrete hollow pipe pier joints based on steel plate connection

Abstract

The invention discloses a connecting mode and structure of reinforced concrete hollow pipe pier joints based on steel plate connection. The connecting structure is mainly composed of a prefabricated pier segment, a steel plate, dampers, SMA rebars and SMA bolts; the prefabricated pier segment is a high-strength concrete pipe pier, and the vertical and horizontal bearing capacity of a connecting steel plate section is not lower than the corresponding bearing capacity of a pier segment section; a plurality of dampers are annularly arranged between the top surface of a bearing platform and the bottom surface of the steel plate; under the action of earthquake, a plastic hinge area is formed at the bottom of the pier, an upper connecting steep plate and a lower connecting steel plate can be opened and closed, a local swinging mechanism is formed by utilizing self-reset of the SMA bolts, and the energy consumption capacity is achieved; the dampers are stimulated to play a role, part of the earthquake energy is absorbed, the SMA bolts and the dampers are convenient for maintenance and replacement after the earthquake, under the action of the SMA rebars, the pier structure system has the function of self reset, and the damage of the plastic hinge area of the pier after the earthquake is reduced.

Description

technical field [0001] The invention relates to the technical field of shock absorption and isolation of bridge engineering, and mainly relates to a joint connection mode and structure of reinforced concrete hollow pipe piers based on steel plate connections. Background technique [0002] my country is located between the Eurasian seismic belt and the circum-Pacific seismic belt, and seismic activity is frequent in most areas. As a pivotal project of urban, highway and railway traffic, once the bridge is severely damaged in an earthquake, it will cause huge economic losses. At the same time, the indirect loss caused by the interruption of traffic due to the damage of the bridge structure is also immeasurable. The interruption of traffic made it difficult for rescue personnel and equipment to be in place in time after the earthquake, which made it more difficult to carry out rescue work. Many victims could not be rescued in time, and their lives might even be in danger. [0...

AI Technical Summary

Problems solved by technology

The interruption of traffic made it difficult for rescue personnel and equipment to be in place in time after the earthquake, which made it more difficult to carry out rescue work. Many victims could not be rescued in time, and their lives might even be in danger

[0003] It is very difficult to repair the severely damaged bridges in the earthquake, which seriously affects the rescue and post-disaster reconstruction work in the disaster area

At present, the most widely used seismic design method in the field of bridges in the world is the ductile seismic design based on the hysteretic performance of bridge piers, but the plastic hinges formed by bridge piers during earthquakes are difficult to repair

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