球面组合网壳的有限元法分析及受力特性的研究
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摘要
组合网壳是一种新型空间结构形式，本文首次采用板壳元、空间偏心梁单元的组合结构有限元法对这种结构的受力特性作了探讨分析，研制了组合网壳受力分析专用计算软件ＣＧＡＳ。文中给出了某一代表性球面组合网壳工程实例，通过分析，阐述了这种结构位移、内力分布规律，讨论了几种与组合网壳相似结构的受力比较，以及肋、钢杆的偏心对受力的影响，总结出的规律对组合网壳结构设计应用有一定参考意义。
Abstract The composite reticulated shell is analyzed by the composite structure finite element method in this paper . A computer program named CGAS is designed to calculate the displacements and internal forces of this structure. Using the program GCAS, the mumerical analysis is presented. The variation of the displacemems and forces in this type of structure is analyzed and the effect of the eccentricities of steel bars and ribs is discussed. In addition, the static behaviour of the composite reticulated shell, spherical ribbed shell and spherical reticulated shell is compared.
Abstract The composite reticulated shell is analyzed by the composite structure finite element method in this paper . A computer program named CGAS is designed to calculate the displacements and internal forces of this structure. Using the program GCAS, the mumerical analysis is presented. The variation of the displacemems and forces in this type of structure is analyzed and the effect of the eccentricities of steel bars and ribs is discussed. In addition, the static behaviour of the composite reticulated shell, spherical ribbed shell and spherical reticulated shell is compared.
引文
［1］董石麟．组合网架的发展与应用——兼述结构形式、计算、构造及施工．建筑结构，第6期．［2］董石麟、詹联盟．网状扁壳与带肋扁壳组合结构的拟三层壳法．空间网格结构论文集，同济大学出版社，1991．［3］高博青、董石麟．组合网架的有限元法分析及受力特性的研究．第六届空间结构学术会议论文集，地震出版社，1992年．
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