Prefabricated swing pier structure system with additional energy dissipation support or self-resetting energy dissipation support

Abstract

A prefabricated assembly type swing pier structure system with an additional energy dissipation support or a self-resetting energy dissipation support belongs to the technical field of seismic mitigation and isolation of bridge engineering, and mainly comprises a prefabricated bearing platform, a prefabricated pier column, a prefabricated cover beam, a prefabricated support and a resetting rib, two bearing platform sleeves are arranged on the prefabricated bearing platform and are used for connecting the two lower lug plates; column sleeves are arranged at the upper part and the lower part of the prefabricated pier column; a cover beam sleeve is arranged in the middle of the prefabricated cover beam and used for being connected with an upper lug plate. The prefabricated support is arranged between the lower lug plates and the upper lug plate and is hinged through a pin; the reset rib penetrates through holes reserved in the prefabricated bearing platform, the prefabricated pier column and the prefabricated cover beam, and are fixedly connected to the lower end of a platform body of the prefabricated bearing platform and the upper end of a beam body of the prefabricated cover beam through a high-strength bolt and a groove-shaped steel gasket. In the earthquake process, the whole system swings, the bending moment of the top and the bottom of the pier column is released, and plastic hinges at joints are avoided.

Description

technical field [0001] The invention relates to a prefabricated swing bridge pier structure system with additional energy-dissipating supports or self-resetting energy-dissipating supports, belonging to the technical field of vibration reduction and isolation in bridge engineering. Background technique [0002] Earthquake disasters are considered to be one of the most serious natural disasters faced by human beings, and earthquake disasters are characterized by suddenness, low predictability, and strong destructiveness. When strong earthquakes occur, huge seismic energy will be released, causing surface and A large number of artificial engineering damages seriously endanger people's lives and property safety. my country is located between the Eurasian seismic belt and the circum-Pacific seismic belt, and most of the country is an earthquake zone, so the seismic performance of structures needs to be improved urgently. The bridge is a pivotal project of the traffic lifeline, ...

AI Technical Summary

Problems solved by technology

The bridge is a pivotal project of the traffic lifeline, and its construction cost is high. Once it is damaged by an earthquake, it will cause huge economic losses, and it is extremely difficult to repair after the earthquake.

There are not many cases where bridge damage directly causes a large number of casualties, but due to the damage and interruption of the traffic lifeline caused by the bridge damage, the rescue personnel cannot be in place in time, and the indirect economic losses and casualties are immeasurable

[0003] At present, most bridges are traditional cast-in-place reinforced concrete simply supported bridges. The seismic mechanism is mainly based on the ductile seismic design of the hysteretic performance of reinforced concrete piers. However, the plastic hinge area of ​​bridge piers will be damaged and destroyed. The damage is irreparable, and the residual displacement after the earthquake is very large, so there is no recoverability; in addition, the current construction of urban bridges is still dominated by on-site pouring, the construction period is long, and the site occupation is large, causing serious traffic congestion around the bridge construction site

[0004] The rocking-self-resetting system is a new type of system with good application prospects. The rocking response of the structure under strong earthquakes can release the bending moment at the structural nodes and avoid the appearance of plastic hinges. However, the energy dissipation capacity of the structural system is extremely high. weak, the structural strength and stiffness are also very small, and the bearing capacity is low; the existing improvement method is only to add energy dissipation devices at the bottom of the pier, but the energy dissipation effect is not obvious, and there is also a large damage to the pier nodes, and the energy consumption The performance and reset effect are not obvious, and the pressure of post-earthquake repair is also great

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