Study On Seismic Performance Of Long-span Continuous Rigid Frame Bridges

Several earthquakes are happening frequently, they threat the people's life and property and loss of life seriously. bridge engineering as an important lifeline, it plays an important role in the whole line, once bridges was damaged, will affect traffic usually and bring the occurrence of secondary disasters, leading to more serious consequences. Therefore, in-depth understanding of the seismic response of bridges, establishing a safe, reliable seismic system, became an important subject for all experts and designers.Zongmugou Bridge as the main object of study, three finite element model is used, apply the response spectrum analysis and dynamic analysis,and calculate interaction of pile-soil-structure and interaction of pile-soil-pile-structure on the impact of seismic response of bridge,include the following aspects:(1) Listing some typical instances of earthquake damage, brief outlines of the situation at home and abroad, and determine the significance of the bridge seismic.(2) Some seismic analysis methods are introduced, such as static method, response spectrum method, dynamic analysis method, for later analysis and the calculation process lays the theoretical foundation.(3) Zongmugou Bridge as the main object of study, and built three different models of analysis and calculating the rigidity of the soil spring of pile-soil interaction and their natural characteristics.(4) Using two methods, based on ground motion parameters, and the second test center of the seismological Bureau of Shan Xi Province offers three seismic waves of safety evaluation analysis and calculate the internal force and displacement, draw some useful conclusions.Analysis of seismic response of Zongmugou Bridges, provide reference and comparison for seismic design of the similar bridges.