Aseismic Optimization for Bridges

摘要

In this paper, the aseismic optimal problem of bridges is described by the form of a nonlinear programming problem with time-dependent constraints. A FE-based structural optimization program for aseismic analyses is written. For the isolation, the objective is to minimize the maximum bending moments at the bottoms of towers and piers with the relative displacements across the aseismic rubber bearings less than a certain allowable value. The design variables are parameters of the aseismic rubber bearings. For the ductility for aseismic resistance, the design objective is to minimize the maximum displacements at the top of the piers, the design variables are curvature, moment of piers at yield and ductility.