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基于全过程非线性动力反应时程分析方法,采用实用的动力稳定性判定准则,以肋环斜杆型单层球面网壳结构为研究对象,系统地分析其在地震作用下的动力稳定性能.分别考虑了地震输入维数(水平、竖向、三向)、材料非线性、结构阻尼、初始几何缺陷、杆件截面面积、矢跨比、屋面荷载、支座条件和不同地震波(EL-Centro波、Taft波、天津波)等参数的影响,分析表明,考虑多维地震输入对单层球面网壳动力稳定性分析非常必要,不同地震波对单层球面网壳结构的动力稳定性影响程度不同,将其计算结果与K型网壳结论对比,得出了一些有意义的结论,可为网壳工程设计提供参考.
Based on the whole-process nonlinear dynamic response time-history analysis method and the practical criterion of dynamic stability, the stability of dynamic stability of the single-layer spherical reticulated shell with rib ring is studied. The seismic input dimension (horizontal, vertical and three directions), material nonlinearity, structural damping, initial geometric imperfection, cross-sectional area of bar, cross-ratio of span, roof load, bearing conditions and different seismic waves Wave, Taft wave and Tianjin wave). The analysis shows that it is necessary to consider the multidimensional seismic input to analyze the dynamic stability of single-layer spherical reticulated dome. Different seismic waves have different influence on the dynamic stability of single- Comparing the calculation results with K type reticulated shell conclusions, some meaningful conclusions are obtained, which can provide reference for the design of reticulated shell project.