斜拉网壳结构构件单元分析及结构动力性能

Analysis of the Tower-column Element and Cable Element as Well as the Dynamic Properties for Cable-stayed Reticulated Shell Structures

阐明了斜拉索及塔柱的计算问题 ,数值计算、分析了斜拉网壳结构的动力性能问题 ,并与网壳结构计算结果进行了对比 .计算分析表明 ,斜拉网壳结构频谱密集 ,与网壳结构的对应振型差别很大 ;斜拉索的存在大大提高了网壳结构的刚度 ,明显改变了网壳结构动力性能 ;

This paper is focused on the research of the basic members such as the tower-column element and cable element, and the dynamic properties of the cable-stayed reticulated shell structures (CSRS), which is composed of cables, tower-columns and reticulated shell structures (RSS). The nonlinearity of a cable element and a novel simplified linear stiffness matrix of a tower-column element which cable elements link to are investigated. Also, some numerical examples and computational comparisons on both CSRS and RSS are given. Through the computations, it is shown that the frequency spectra of both CSRS and RSS are very dense. That the cables are added to RSS can change the natural frequencies and mode shapes, and enhance the stiffness of RSS significantly. It is clear that the magnitude of the masses exerted on CSRS influences its natural frequencies greatly.