机构地区: 广州航海高等专科学校
出 处: 《空间结构》 2009年第2期42-47,共6页
摘 要: 通过半刚性节点模型,利用有限元方法对球面网壳结构进行动力分析.建立了半刚性情形下单元刚度矩阵,通过求解特征值问题,得到半刚性球面网壳结构自振特性规律,并与理想刚接及理想铰接情形进行了对比.采用时程分析法对球面网壳进行了水平地震作用下的分析计算,比较了半刚性节点模型所得结果与理想刚接及理想铰情形的异同,说明使用半刚性模型进行结构计算分析的合理性.论文结论对网壳结构的工程设计及施工有一定的参考价值. The finite element method is used to analyze the dynamic characteristics of the grid shell structures by a semi-rigid node model. The element's stiffness matrix is established for the semi-rigid structures. The natural vibration characteristic is obtained by solving the eigen-value equations. The displacement results of semi-rigid structures are compared with that of the perfect hinged and complete rigid structures. The time-history method is utilized to get the horizontal seismic response and these three structures, i.e. semi-rigid, perfect hinged and complete rigid structures are analyzed and compared. The simulation results show the rationality of semi-rigid model for practical structure analysis. The conclusion of this paper can benefit the design and construction of spatial grid structures.
领 域: [建筑科学]