Comparative Study On The Seismic Response Between The Long-span Corrugated Steel Web Plate Girder Bridge And Traditional Girder Bridge

Corrugated steel web plate prestressed concrete box girder with corrugated steel web plate which replace traditional box girder web plate concrete, is a new type of steel concrete composite structure. Compared with traditional concrete box girder bridge, upper structure weight has been reduced about20%-30%, the quanlitiesof the bottom structure have been reduced, and the waste of building materials has been avoided. Engineering practice shows that medium and large span Bridges adopting corrugated steel web box girder bridge structure can reduce the weight of the upper structure, and significantly reduce the effects of earthquake excitation, and improve the seismic performance of the bridge in some degree.This thesis, combines the mechanical properties of corrugated steel web plate box girder, with a long-span traditional continuous beam bridge as the engineering background, we put it into corrugated steel web, and analyze the seismic response of it. The main content of this thesis includes:1、The development situation,structure characteristics and mechanical performance of corrugated steel web plate box girder Bridges is discussed.The method of seismic analysis oflong-span continuous girder bridge and the development of continuous girder bridgeseismic design are introduced in this paper.2、The basic theory knowledge of the bridge seismic analysis method is introduced, which includes the dynamic response spectrum method and the dynamic time history analysis method. Using corrugated steel web instead of thick reinforced concrete girder as contrast design, the structure dynamic finite element analysis model is established, and its dynamic characteristic is analyzed.3、Relying on a builted long-span traditional continuous beam bridge-Youshui great bridge, the space finite element model is established with the universal bridge structure analysis software-Midas Civil. Three design parameters including the main girder depth-span ratio, the change of beam bottom line and the diaphragm plate spacing are selected to make response spectrum analysis.From the analysis we can obtain the influenced law of the seismic response of the bridge when the different parameters change, and we compare it with the analysis of the seismic response characteristics of the ordinary continuous beam bridge.4、Using time history analysis method, corrugated steel web plate and the traditional girder bridge are studied on the different characteristics of structural responses under the action of seismic wave, and the analysis of the seismic response characteristics of the ordinary continuous beam bridge under the action of seismic wave of reaction conditions arecompared with it.