In the process of finite element analyzing , the beam , column and b race that not enter the plastic parts adopt bearn element that considered geometry nonlinear . the links entering plastic adopt space degenerate shell element that considered the nonlinear large - deformation , together with mixed hardening rule , which linearly combines isotropic and kinematic hardening 在有限元分析过程中，对于未进入塑性部分的梁、柱及支撑采用梁单元，梁单元考虑了几何非线性，对于进入塑性部分的耗能梁段采用空间退化曲壳单元，曲壳单元考虑了几何和材料的双重非线性，材料的强化采用了混合强化法则，非线性方程通过newton - raphson迭代结合增量法求解。
