Mechanical Behavior Analysis Of Shear Connector For Partial Cable-Staged Bridge With Corrugated Steel Webs

Partial cable-staged bridge with corrugated steel webs is a kind of composite structure which applies composite box girder with corrugated steel webs to partial cable-staged bridge. It combines two kinds of structures together skillfully, and give full play to the respective advantages. The design of shear connector between corrugated steel webs and concrete flange is the most important part, which can ensure that the two parts work together, and whose transfer mechanism and mechanical behavior is the research emphasis of the structure.This paper takes Chaoyanggou reservoir super large bridge as the engineering background, the two kinds of shear connectors (stud connector, embedded connector) used in the plate box girder with corrugated steel web are studied. Firstly, the spatial bar system model is built, and its static performance is analyzed. According to occupational standards, the shear strength and anti-slip property of stud connectors and embedded connectors are checked. The beam segment that bears the maximum shear is founded out according to the results of static analysis. The spatial grid model of this beam segment is built, and the internal forces of its each part are calculated. Secondly, to simplify the calculation, the target beam segment is divided into three parts which are medium web, second medium web and boundary web. Then, solid models are built by finite element detailed analysis software and the internal force results of spatial grid model are applied to these solid models. Then, their static performances are analyzed, mechanical behaviors of stud connector and embedded connector are researched in the aspects of displacement and stress. Finally, combining two factor of the difference of linear expansion coefficient of steel and concrete and the weather temperature change, from two aspects of the whole frame temperature raise or fall and the temperature difference, the temperature effect of the two kinds of shear connectors is researched, and those stress distribution law is obtained, and its reason is analyzed. It is more significant to partial cabled-stayed with corrugated steel webs for the design and construction.