Full-prefabricated assembling dual-layer framework pier structure system of which functions can be recovered after earthquake

Abstract

The invention discloses a full-prefabricated assembling dual-layer framework pier structure system of which functions can be recovered after an earthquake. The structure system is composed of a prefabricated bearing platform, prefabricated lower-layer pier studs, a prefabricated lower-layer cross beam, prefabricated upper-layer pier studs, a prefabricated upper-layer cross beam, a friction energy-dissipation damper, unbonded tendons and steel pin bolts. The prefabricated upper-layer pier studs are connected with the prefabricated upper-layer cross beam and the prefabricated lower-layer cross beam through the unbonded tendons, and with the assistance of the friction damper, a self-restoration swing energy-dissipation system is formed. The prefabricated lower-layer pier studs are connected with the prefabricated lower-layer cross beam and the bearing platform through a grouting sleeve and in an insertion mode respectively to form an equivalent cast-in-situ system. Under a small earthquake effect, the upper layer dissipates energy through self-restoration swing, and the lower-layer structure is in an elastic period. The lower-layer structure generates limited plastic damage to dissipate the earthquake energy while the upper-layer structure generates swing to dissipate the energy. After the earthquake, the upper-layer structure can be restored by itself, the lower-layer structure can be quickly repaired, and the structure system can quickly recover the recovery function.

Description

technical field [0001] The invention relates to a novel bridge structure system, in particular to a fully prefabricated and assembled double-layer frame pier structure system and a method for recoverable function after an earthquake. Background technique [0002] With the development of my country's urbanization process, the problem of urban traffic congestion is becoming more and more serious. The structural performance of existing urban traffic infrastructure is degraded, and the carrying capacity is reduced, which seriously restricts the development of cities. It is urgent to rebuild or build new traffic infrastructure such as urban roads and bridges. . Double-layer viaducts can make full use of space and realize traffic diversion and expansion on a limited road area. It is an efficient transportation network solution and has been more and more widely used in the construction of urban viaducts. [0003] At present, the construction of urban bridges is still dominated by o...

AI Technical Summary

Problems solved by technology

[0004] The piers of double-deck viaducts mostly use frame piers, which are subjected to complex stresses under earthquake action, and there may be as many as eight potential plastic hinge areas in the structure, and the overall stability of the structure may occur before the structure reaches ductility. Seismic performance is not easy to meet the requirements

At the same time, the piers of viaducts based on the theory of ductile anti-seismic design often produce serious damage and large residual deformation under the action of earthquakes, which makes post-earthquake repair difficult, affects the traffic capacity of viaducts, and hinders the implementation of earthquake relief.

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