【摘要】 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.更多还原

【Abstract】 Based on the full-range nonlinear dynamic response analysis and using a practical dynamic stability behavior determinant criterion,the nonlinear dynamic stability of Schwedler single-layer spherical reticulated shells under earthquake action is analyzed;the factors,which affect the response behaviors,such as the input dimensions of the seismic loads,the material nonlinearity,the structural damping,the initial geometric imperfection,the cross-sectional areas of members,the ratios of rise to span,the roof loads,the condition of supports and the different earthquake waves,are taken into account;the computing results are shown that discussing input dimensions of the seismic loads is necessary for analyzing dynamic stability of single-layer spherical reticulated shells;and the effects of different earthquake waves are different for dynamic stability of single-layer spherical reticulated shells.The obtained results of Schwedler shells are compared with the conclusions of Kiewitt shells.It can provide a valuable reference for practical design of reticulated shells.更多还原