Abstract
In seismic design criteria for highway bridges, it is required to calculate the responses of structures to seismic force by the time-history nonlinear dynamic response analysis (abbreviated as NDA after). It is, however, extremely troublesome and difficult to obtain a design solution with NDA as the main response analysis method. In this study, the RBFN (radial basis function network) is applied to approximate the constraints on dynamic responses. As numerical examples, the method is applied to the seismic design of several RC piers of highway bridges, and finally is applied to the seismic design of the four continuous RC bridge with rubber shoes on its piers and abutments successfully.