Prefabricated fabricated pier suitable for moderate-strong earthquake area and construction method of prefabricated fabricated pier

Abstract

The invention discloses a prefabricated fabricated pier suitable for a moderate-strong earthquake area and a construction method of the prefabricated fabricated pier. The prefabricated fabricated piercomprises a bearing platform, a pier body, a steel reinforcing cage, a cover beam and prestressed steel bars. The bearing platform is fixed on the top surface of a pile foundation. The steel reinforcing cage is arranged in the pier body. The bottom of the steel reinforcing cage is fixedly connected with the bearing platform. The top of the pier body is fixedly connected with the cover beam. The four prestressed steel bars are distributed in a rectangular shape. One ends of the prestressed steel bars are located in the bearing platform, and the other ends of the prestressed steel bars are located at the top of the cover beam. The steel reinforcing cage comprises a bearing platform steel reinforcing cage and a pier body steel reinforcing cage. The pier body steel reinforcing cage comprisesan energy dissipation steel bar, a longitudinal bar and a stirrup. The pier body comprises common concrete, a bottom UHPC sleeve, a transition UHPC sleeve, a steel plate and a prefabricated segment. According to the prefabricated fabricated pier suitable for the moderate-strong earthquake area and the construction method of the prefabricated fabricated pier, the technical scheme of combination ofthe UHPC sleeves and the common concrete, combination of consolidation and assembling and combination of part of the unbounded energy dissipation steel bar and the steel plate is adopted, and the prefabricated fabricated pier has the advantages of low damage under the earthquake action, high energy dissipation ability, uniform local stress distribution and the like, and can be applied to bridges in the moderate-strong earthquake area.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering, in particular to a prefabricated bridge pier suitable for moderately strong earthquake areas and a construction method thereof. Background technique [0002] At present, the construction method of in-situ pouring is mainly adopted for the substructure of bridges in our country. On-site pouring construction often has a long construction period, a large amount of labor, and the construction quality is not easy to guarantee, and it has a great impact on the surrounding environment. In order to overcome these adverse effects, the form of fabricated bridge piers came into being. Compared with traditional cast-in-place piers, prefabricated piers have the advantages of short construction period, low environmental impact, and high construction quality, which meet the development requirements of the industrialization of building structures in my country. [0003] For general prefabricated pie...

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Problems solved by technology

[0007] The purpose of the present invention is to provide a prefabricated assembled bridge pier and its construction method suitable for moderately strong earthquake areas, which solves the problems of the existing prefabricated assembled bridge piers such as easy damage, weak hysteretic energy dissipation capacity, and large local stress.

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