Dynamic response analysis of RC bridge subjected to non-uniform seismic excitations

This study aims to reveal the dynamic response of a reinforced concrete rigid frame bridge subjected to non-uniform seismic excitations. Based on the displacement method and improved large mass method, an acquire technique for quasi-static/dynamic components of structural seismic responses has been presented and validated through numerical simulations. The results indicate that the acquire technique can yield the quasi-static/dynamic components conveniently and satisfactorily. The bridge suffers critical complex response under non-uniform seismic excitations. The quasi-static components are generally 80% less than the dynamic components; however they increase rapidly with increasing relative displacements between the pier foundations. The total dynamic responses of different structure members can be magnified or reduced irregularly by the interactions of the quasi-static components and dynamic components.