as to the ductility, i establish the relationship of structure member's curvature ductility to potential ductility and structure ductility and that of bridge's ductility to anti-flexure and anti-shear capacity to provide the theory reference for anti-seismic assessment 针对延性桥梁,建立构件曲率延性与位移延性、结构整体延性与构件局部延性、桥梁延性与抗弯承载力和桥梁延性与抗剪承载力之间的关系,为抗震评估提供理论依据。