Study of longitudinal seismic response for long-span combined bridge of continuous rigid-frame and arch structure

Take Guangzhou Xinguang Bridge as an example,a spatial beam FEM model is established to analyze in detail longitudinal seismic respcnses of long-span combined bridge of continuous rigid-frame and arch structure under the action of consistent and traveling wave by dynamic time-history method.It is found that except for side piers traveling wave effect has great influence on seismic nspenoes of key members of the bridge,such as upper and lower chords of arch ribs and slant legs of V-shaped rigid-frame.With the increasing of shear wave speed,the maximum longitudinal relative displacements of crown of main arch to arch foot are decreasing gradually,however,the shear wave speed almost has no influence to the maximum longitudinal relative displacements of crown of side arch to arch foot.