论文部分内容阅读
在对大跨度单层球面网壳进行设计和分析时,动力稳定性是主要的控制因素。本研究将上部的单层球面网壳与下部支承结构作为整体,研究结构在地震荷载作用下的动力稳定性。在分析计算时,考虑了网壳的初始几何缺陷以及几何非线性和材料非线性;研究了下部支承结构的刚度对网壳动力稳定性的影响以及杆件的塑性发展过程。计算结果表明:下部支承结构的刚度对网壳动力稳定性的影响起着非常重要的作用,在对网壳进行地震分析或动力稳定分析时,应将上部的网壳与下部支承结构作为整体进行分析。
Dynamic stability is a major controlling factor in the design and analysis of large-span single-layer reticular shells. In this study, the upper single-layer spherical reticulated shell and the lower support structure as a whole, study the dynamic stability of the structure under earthquake load. In the analysis and calculation, the initial geometrical defects and geometric nonlinearities and material nonlinearities of the reticulated shell are considered. The influence of the stiffness of the substructure on the dynamic stability of the reticulated shell and the plastic development of the rod are studied. The calculation results show that the stiffness of the lower support structure plays an important role in the dynamic stability of the reticulated shell. In the seismic analysis or dynamic stability analysis of the reticulated shell, the upper reticulated shell and the lower support structure should be taken as a whole analysis.