ABSTRACT
The results of the classic pushover analysis procedure based on force for estimating the seismic performance of the bridge depend on the selection of the lateral load pattern. And the classic pushover analysis procedure based on force can’t account for the structural stiffness degradation caused by structural yielding because that structural internal force and loading history is not the single value correspondence relationship. Earthquake damage, experiment and theoretical analysis all indicate that the deficiency of transfiguration capacity and capacity of energy dissipation are the main reasons of structure collapse. The degree of damage of the structures in large earthquake relates to their displacement responses and deformability. So it is more reasonable to control structural behavior by displacement[1,2,3].
