Time history analysis of seismic response of through CFST non isolated and isolated arch bridges

To explore the difference in impact of transverse bracing on seismic effect through concrete-filled steel tube arch bridges with non-isolated and earthquake-isolated, nine earthquake-isolated structural models under different cross-bracing arrangements were established, Elcentro waves selected. The internal force, displacement, velocity, absolute acceleration, relative separation ribs each model compared analyzed uniform excitation along bridge, vertical directions, multi-dimensional combined excitation, multipoint considering traveling wave effect. Based shear force displacement earthquake support, it is concluded that response excitations various more complicated. installation upper part rib can reduce nonseismic structure. “X”-shaped cross brace at top “K”-shaped lower help to acceleration rib. structure are significantly reduced.