【摘要】 矢跨比对单层球面网壳结构的刚度、整体稳定性及失稳区域有很大影响。本研究利用非线性有限单元法,对4种不同矢跨比的单层球面网壳结构进行非线性稳定全过程分析。通过对考虑不同位置处的杆件屈曲与无杆件屈曲情况下的极限荷载、失稳区域的对比,研究了矢跨比对考虑杆件屈曲的单层球面网壳结构整体稳定性的影响,可为单层球面网壳结构合理选择矢跨比提供理论依据。更多还原

【Abstract】 Rise-span ratio affects the stiffness of single-layer lattice domes,and therefore has great influence on the overall stability and instability regions.In this paper,based on nonlinear finite element theory,considering the member buckling in different locations,the geometrical nonlinear static stability of K8single-layer lattice dome with four different rise-span ratios was analyzed.With the comparison of considering and without considering the member buckling,the influence of the member buckling on the stability behavior of single-layer lattice domes with different rise-span ratios was investigated.The analysis results will be helpful for choosing the suitable rise-span ratio for the single-layer lattice dome structures.更多还原