The most unfavorable earthquake excitations were investigated, in which geometric non-linearity and material non-linearity were all taken into account. 摘要同时考虑几何非线性与材料非线性，对单层球面网壳在地震作用下结构的最不利荷载进行分析。
Nonlinear analysis method on the mechanical behavior of preflex composite beams was established with the nonlinear stress-strain curves of materials. 摘要采用材料非线性本构关系研究预弯组合梁的受力行为，建立预弯组合梁从预弯钢梁加荷到结构破坏的非线性全过程分析方法。
