论文部分内容阅读
单层球面网壳冗余度较低,个别杆件失效容易引起结构连续倒塌。为提高单层球面网壳的抗连续倒塌能力,可以采用将单层网壳主肋设计为局部双层的方法。应用ABAQUS软件通过自编程序,考虑杆件失稳及失稳后行为,对比分析了采用局部双层前、后静力荷载作用下单层球面网壳极限承载力、节点位移和失效模态,以及采用局部双层前、后地震荷载作用下单层球面网壳极限承载力。分析了地震作用下局部双层厚度不同时单层球面网壳结构的极限承载力。分析结果表明,将单层球面网壳主肋设计为局部双层可提高网壳结构极限承载力,改变网壳失效模式。
Single-layer spherical reticular shell redundancy is low, the failure of individual components easily lead to continuous collapse of the structure. In order to improve the anti-collapse ability of the single-layer reticulated dome, a method of designing the main rib of the single-layer reticulated shell as a local double layer can be adopted. ABAQUS software was used to analyze the ultimate bearing capacity, node displacement and failure modes of single-layer reticulated shells under local static loads before and after local double-layer considering the instability and instability behavior of the rods. And the ultimate bearing capacity of single-layer spherical reticulated shells under local seismic loads before and after using double bilayers. The ultimate bearing capacity of single-layer spherical reticulated shells with different local bilayer thickness under earthquake action is analyzed. The analysis results show that designing the main rib of the single-layer spherical reticulated dome as a local double layer can improve the ultimate bearing capacity of the reticulated shell and change the failure mode of the reticulated shell.