Seismic Response Analysis Of Long Span Continuous Steel Truss Arch Bridge

In recent decades, earthquake disaster frequently occurred all over the world. And bridges are lifeline engineering, once destroyed, it will bring great damage to the lives and properties of people. It is necessary to make an in-depth study and analysis to the seismic performance of bridges, which is an important factor for safety.In this thesis, taking one long span continuous steel truss arch bridge as an example, based on the basic theory of the seismic response analysis, three methods including spectrum response analysis , time-history analysis of earthquake and stochastic seismic power spectrum density model are applied to the bridge. The main content in this thesis includes:â‘ Establish reasonable calculation model of bridge and calculate the self-vibration characteristic of the bridge.â‘¡Three methods including spectrum response analysis , time-history analysis of earthquake and stochastic seismic power spectrum density model are applied to the bridge; Consider the influence of the wave-passage effect interaction to the seismic response of the bridge.â‘¢Then the engineering examples are analyzed, three seismic response analysis methods are adapted, accurate finite element model is established, and numerical analysis is performed based on the time-history theory and stochastic seismic power spectrum density model which are proposed in this paper. The analysis result proofed the rationality and feasibility of the theories proposed in this paper.It is expected to give some references for practical seismic design of continuous steel truss arch bridges.