The Seismic Response Analysis Of The Long-span Steel Truss Bridge

The bridge is is an important part in railway engineering, earthquake disasterprevention and crisis management system.It has a very important position in theearthquake relief. In order to reduce the earthquake disaster formation damage, notonly to do seismic reinforcement measures for bridge in bridge design, also should takecorresponding measures to meet the seismic requirements, improve the seismiccapacity of the bridge, the bridge seismic response analysis is necessary.In this paper, by consulting relevant literature, on bridge seismic situation,problems are analyzed and summarized, and the large-scale general software ANSYSfor a large span steel truss bridge for the seismic response analysis of seismicperformance, some dynamic characteristics of long-span steel truss bridge and thebridge system, for the further study in the future. Foundation. Specific include thefollowing aspects:(1) through access to information, expounds the present situation, the seismicperformance analysis on the bridge for existing problems, and to reduce the damage ofbridge some design ideas, and summarizes the relevant theoretical analysis on seismicperformance, as late as the basis of seismic analysis of bridge structure.(2) using the finite element software ANSYS, modal analysis of a large span steeltruss bridge for example project, get the natural frequency and vibration mode diagramof bridge structure, analysis of its vibration characteristics.(3) using the finite element software ANSYS transient analysis of seismic wave oflarge span steel truss bridge, study its respectively in the seismic performance of thebridge under the action of three kinds of different. Through the analysis, the interfacedisplacement node response curve span bridge control, and peak displacement,analyzed, some seismic performance of the bridge system, and provide some referencefor the later aseismic design.