Research on Seismic Performance of Large-span Steel Truss Composite Beam Bridge Based on Viscous Damper
Based on the background of large-span steel-concrete composite beam,according to the natural vibration characteristics and site effect of the bridge to generate seismic waves,the finite element model of the whole bridge is established,and the nonlinear time history analysis method is used to analyze the influence of the damping coefficient and velocity index of the viscous damper on the internal force and displacement of the bridge.The results show that setting longitudinal viscous damper on the large-span steel truss composite beam can effectively reduce the internal force and displacement of the bottom section of the bridge pier,and the reasonable optimization of damping parameters can effectively improve the damper displacement and the bending moment damping rate.
large-span steel truss composite beamviscous dampernonlinear time history methodlongitudinal damping system
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