A swinging double-deck bridge bent frame and its installation method

Abstract

The invention discloses a novel swing type double-deck bridge bent frame which comprises a bent frame foundation, a group of bottom prefabricated bridge piers, a bottom prefabricated cover beam, a group of top prefabricated bridge piers, a top prefabricated cover beam, unbonded prestressing tendons, buckling-restrained braces and steel connecting pieces, wherein the bottom prefabricated bridge piers are respectively arranged at the left end and the right end of the bent frame foundation, and the bottom prefabricated cover beam is arranged at the top ends of the bottom prefabricated bridge piers; the top prefabricated bridge piers are respectively arranged at the left end and the right end of the bottom prefabricated cover beam, and the top prefabricated cover beam is arranged at the top ends of the top prefabricated bridge piers; the unbonded prestressing tendons penetrate through the two ends of the bottom prefabricated bridge piers, are respectively connected with the bent frame foundation and the bottom prefabricated cover beam and used for providing self-restoring capacity for the bent frame; the buckling-restrained braces are arranged between the bottom prefabricated cover beam and the bent frame foundation and used for providing main transverse stiffness and energy-dissipating capacity. The design of the double-deck bridge bent frame realizes the idea of functional separation, and the vertical bearing capacity of the bent frame is born by the prefabricated bridge piers and the prefabricated cover beams under a normal service condition. The transverse bridge stiffness and the energy-dissipating capacity of the bent frame are mainly born by the buckling-restrained braces under the action of an earthquake.

Description

technical field [0001] The invention relates to a novel bridge structure system, in particular to a novel bridge bent structure system of a double-deck elevated bridge. Background technique [0002] The double-layer elevated bridge has played a good role in three-dimensional traffic. Under the background of the increasingly serious urban traffic congestion, the double-layer elevated bridge has a wide application prospect in urban bridge construction. [0003] Traditional bridge construction mostly adopts the form of pouring on site, and the construction period is long, which has caused serious impact on urban traffic and the surrounding environment. The main force-bearing components of the bridge, such as piers, cap girders, and main girders, are prefabricated in the factory, and only need to be installed on site as a prefabricated-assembled bridge structure, which can greatly speed up the construction progress, reduce construction costs, and reduce the impact on urban traff...

AI Technical Summary

Problems solved by technology

However, the prefabricated-fabricated bridge structure has weak seismic capacity and a single structural form, which hinders its application in bridge engineering, and has not been well resolved.

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