A steel-ultra-high-performance concrete composite continuous beam bridge structure and its construction method

Abstract

The invention discloses a steel-ultra-high-performance concrete combined continuous beam bridge structure and a construction method thereof. The combined continuous beam bridge structure comprises a continuous beam formed by splicing M steel-ultra-high-performance concrete combined beam sections and (M+1) steel-high-intensity concrete combined beam sections; the steel-ultra-high-performance concrete combined beam sections and the steel-high-intensity concrete combined beam sections are distributed in a staggered manner and M is more than or equal to 2; the M steel-ultra-high-performance concrete combined beam sections are supported on M bridge piers respectively; each steel-ultra-high-performance concrete combined beam section comprises a second steel beam segment and an ultra-high-performance concrete board; the construction method comprises the following steps: 1, prefabricating and machining; 2, mounting a lower part beam body and a first steel beam segment; 3, hoisting a high-intensity concrete board; 4, mounting a steel-ultra-high-performance concrete combined section; 5, carrying out wet joint construction. The steel-ultra-high-performance concrete combined continuous beam bridge structure and the construction method thereof have the advantages of reasonable design, simplicity and convenience in construction and good utilization effect, and the problem that a hogging moment region of an existing steel-concrete continuous beam bridge is cracked and the problem that the pre-stress efficiency is low can be solved.

Description

technical field [0001] The invention belongs to the technical field of bridge construction, and in particular relates to a steel-ultra-high-performance concrete combined continuous beam bridge structure and a construction method thereof. Background technique [0002] The steel-(conventional high-strength) concrete composite continuous girder bridge has light weight, good economy, and can make full use of the good tensile properties of steel. The above-mentioned conventional strength concrete refers to ordinary concrete with a strength grade of C60 or above, also called high-strength concrete or conventional high-strength concrete. However, in the negative moment area of ​​the pier top of the three-span or multi-span continuous girder bridge, if the way of arranging prestress is adopted to offset the tensile stress generated by the external load, since the prestress is jointly borne by steel and concrete, conventional high-strength Concrete does not distribute much prestress...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a steel-ultra-high-performance concrete combined continuous beam bridge structure, which has a simple structure, reasonable design, easy construction, good use effect, and can effectively solve the problems in the existing technology. Cracking in the Negative Moment Zone and Inefficiency of Prestressing in Steel-Concrete Continuous Girder Bridges

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