Research On Seismic Response Of Corrugated Steel Web Pc Continuous Rigid Frame Bridge In High Seismic Region

Corrugated steel web PC box girder is a new kind of steel-prestressed concrete composite structure, it use corrugated steel web alternative to the ordinary concrete web. Compared with ordinary concrete box girder bridge, the dead weight of bridge superstructure about reducing from20%to30%, it reducing the quantities of substructure. As the earthquake disaster happened frequently in recent years, especially the WenChuan earthquake of SiChuan which happened in2008and the Yaan earthquake of SiChuan happened in this year bringed disastrous lessons, now the bridge as a lifeline,its seismic capacity has been paid more and more attention. Engineering practice shows that medium-sized span or large span bridge with corrugated steel web PC box girder structure can reduce the weight of the bridge superstructure, so that the seismic excitation effect is significantly reduced and the seismic performance must be improve. So corrugated steel web PC box girder bridges can be widely used in earthquake-prone area. It is nessary to do research on seismic response and seismic performance of such a new bridge structure as corrugated steel web PC continuous rigid frame bridge.The main content of this paper includes:1、The development situation and the characteristics of corrugated steel web PC rigid frame bridges is discussed in this paper. Some methods of seismic analysis and continuous continuous rigid frame bridge seismic design on long-span bridge, concluded the method of seismic response analysis is introduced.2、Based on the theory, With the project background of a corrugated steel web PC continuous steel bridge-Dadu River Bridge, The space structural behavior of static force and dynamic behavior by Midas Civil is researched on in this paper. Then the effect of pile-soil-structure interaction on dynamic behavior is analysised. For comparative analysis with traditional PC continuous rigid frame bridge at the same time.3、In use of response spectrum method and dynamic response history analysis method, The seismic response in the level of E1is analyzed and compared the results. The response spectrum analysis used the standard acceleration response spectrum as the input spectrum curve, Then the general rule of the bridge displacement and stress seismic response in axial direction, transverse direction, vertical direction and3direction is analysed. The dynamic time history analysis on DaDu River bridge used the seismic waves of El-Centro, Taft and artificial wave fitted by the standard response spectrum, then checked and comparatively analyzed the results of the two methods. Comparatively analyzed seismic performance difference between the corrugated steel web PC continuous steel bridge and the traditional PC continuous steel bridge at the same time.