The geometrical nonlinearities includes cable sag effect, beam-column effect and large displacement effect.

• 程序DNFEA在几何非线性方面,可以考虑垂度效应、梁柱效应和大位移效应,在材料非线性方面,可以考虑钢管混凝土、普通混凝土和钢材的非线性特性。