Arched girder combined type concrete continuous girder bridge structure

Abstract

The invention discloses an arched girder combined type concrete continuous girder bridge structure. The arched girder combined type concrete continuous girder bridge structure comprises a plurality of main piers. A pier top stand column and a pier top girder section are arranged at the top of each main pier and connected with two arched girder combined frames arranged on the two sides of the pier top stand column and the pier top girder section. Each arched girder combined frame is composed of a lower string arched box girder and an upper string box girder. The upper string box girders are horizontally arranged and stretch out from the two ends of the pier top girder sections to the two sides of the main piers in the bridge direction. The lower string arched box girders are obliquely arranged and stretch out from the lower ends of the pier top stand columns to the two sides of the main piers in the bridge direction. The lower string arched box girders and the upper string box girders are joined on the two sides of the main piers. The upper string box girders are pulled, the lower string arched box girders are pressed, and therefore the lower string arched box girders and the upper string box girders reach force balance; and the girder axes of the lower string arched box girders arch up, part of bending moment generated by self eight is counteracted, and an arched structure which is mainly pressed and even in stress distribution is achieved.

Description

technical field [0001] The invention relates to the technical field of bridges used in civil engineering, and more specifically relates to an arch-beam combined concrete continuous beam bridge structure, which realizes a new continuous beam bridge structure with greater spanning capacity and better economy form. Background technique [0002] A bridge is a structure for crossing various obstacles (such as rivers or other structures) in highways, railways, urban roads, rural roads, and water conservancy construction. According to the mechanical characteristics of the structure, the bridge can be divided into beam, arch, rigid frame, suspension and composite system. The concrete structure mainly adopts beam, arch and rigid frame system. Concrete continuous girder bridge is a basic bridge type of long-span bridge. Unlike continuous rigid frame bridge pier girder consolidation, the superstructure of continuous girder bridge is connected to the pier by fixed or movable supports,...

AI Technical Summary

Problems solved by technology

Generally speaking, the main disadvantages of traditional prestressed concrete continuous girder bridges are: (1) The structural load-bearing efficiency is low. When the span is greater than 150m, it is prone to cracking and deflection, and the technical risk increases. The safety and durability of the structure property deterioration, and the economical performance of the project has deteriorated sharply; (2) The superstructure is self-heavy, resulting in large-scale bridge piers and foundation projects

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