Portion waveshape steel web plate pre-stress steel-concrete continuous combined case beam

Abstract

The present invention relates to a partial corrugated steel web prestressed steel-concrete continuous composite box-girder. The concrete roof plate is permanently connected with the steel box-girder through a connecting plate and a shear connector. In the steel box girder the steel diaphragm plates are installed respectively corresponding to each fulcrum. The whole steel box-girder is composed of a structural negative monument area segment and the structural positive moment area segment arranged at two ends. The concrete roof plate of the structural negative moment area segment is stretched with a longitudinal prestressed rib. A longitudinal stiffening rib is arranged in the steel baseboard. The web plates at two sides of the steel box-girder in the structural negative moment area are corrugated steel webs. The web plates of the steel box-girder in the structural positive moment area steel box-girder are plane steel web plate. The invention can overcome the problems of low efficiency of longitudinal pre-stress of negative moment area in the continuous composite box-girder and corrugated steel web PC composite box-girder, easily destabilization of the plane steel web plate or more arrangement of the longitudinal prestressed rib inside or outside the box-girder and complex construction and the like. The invention has broad applying prospect in the bridge engineering and long-span structure.

Description

technical field [0001] The invention relates to the fields of bridge engineering and long-span structures, in particular to a prestressed steel-concrete continuous composite box girder. Background technique [0002] With the rapid development of bridge construction in our country, bridges with various new structural forms are constantly emerging, and the lightweight and new type of bridges have always been a matter of great concern to the engineering community. Considering structural mechanical properties, material utilization, construction speed, economic benefits and other factors, more and more steel-concrete composite structures are used in bridge projects at home and abroad, among which prestressed steel-concrete continuous composite box girder and prestressed concrete PC composite box girder with stress corrugated web is a common structural form. [0003] Conventional prestressed steel-concrete continuous composite box girder is mainly composed of concrete roof, steel...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a partial corrugated steel web prestressed steel-concrete continuous composite box girder, which not only has the existing prestressed steel-concrete continuous composite box girder. Box girder and described prestressed corrugated web PC composite box girder structure advantage, can effectively overcome again described existing prestressed steel-concrete continuous composite box girder the concrete roof longitudinal prestressing rib efficiency is low, the planar steel web is easy Local instability, and the prestressed corrugated web PC composite box girder needs to arrange a large number of internal and external prestressed tendons, complex construction, etc., and has good mechanical performance, high material utilization rate, simple and fast construction, and significant economic benefits specialty

Images