Analysis Of Influence Parameters Of PC Composite Box-girder With Corrugated Steel Webs Under Seismic Action

In recent years,China's transportation has entered a stage of rapid development,and many new types of bridges have emerged.In 2005,China built the first PC composite box-girder with corrugated steel webs.After that,the PC composite girder bridge with corrugated steel webs has developed rapidly in China due to many advantages of its own in structure,mechanical performance and economic benefits.However,the research on this type in China mainly focuses on the static performance.Relatively speaking,there are few studies on the dynamic performance.With the rapid development of the PC composite girder bridge with corrugated steel web in China,it is especially important to study its seismic performance.This paper takes Rouge River Bridge of Xifu Expressway(Baoding Section)as the engineering background,establishes the finite element analysis model,uses the time history analysis method to analyze the seismic response,and studies the influence of relevant factors on its seismic response.The main contents of this paper are as follows:(1)In this paper,the development status of PC composite box-girder bridge with corrugated steel webs and the research status of parameters analysis under seismic response are introduced in detail.The characteristics of corrugated steel web PC composite box-girder bridge are also described.On this basis,the calculation methods often used in seismic analysis of bridges are elaborated,namely static analysis method,response spectrum method and dynamic time history analysis method.(2)According to the engineering background of the Rouge River Bridge,the large-scale general finite element software ANSYS was used to establish the finite element model of the Rouge River Bridge.The influence of corrugated steel web thickness and wave-fold angle on the dynamic characteristics of PC continuous rigid frame bridge with corrugated steel web is studied.(3)According to the engineering background of the Rouge River Bridge,the finite element model of the corrugated steel web PC continuous rigid frame bridge was established by the finite element analysis software Midas/Civil.And the influence of the spectral characteristics of the ground motion,the structure of the pier,the structural damping ratio and pile-soil interaction is analyzed on the structural seismic response.(4)The large-scale general finite element software ANSYS was used to establish the multi-scale model of the Rouge River Bridge.The applicability of the multi-scale model was studied.The effects of corrugated steel web thickness and wave-fold effect on the seismic response of corrugated steel webs and bridge piers were studied.