Abstract
When a large earthquake occurs, plastic deformation is developed not only in the reinforced concrete piers but the pile foundation of a bridge. Since the nonlinear behavior of the pier and that of the pile foundation is interacted, it is required to evaluate the lateral load which should be applied to the pile foundation in the push over-analysis, considering the flexural strength of the pier. This paper describes a series of nonlinear analysis and the push-over analysis for a bridge. It is found from the analysis that the push-over analysis provides sufficient accuracy for evaluating the deformation of the piles if the contribution of damping force, in addition to the flexural strength of pier, is considered to evaluate the lateral load, and if the deformation of the surrounding soils is considered.
