大连极地海洋动物馆屋盖的结构选型及锯齿状锥面网壳的静、动力特性分析
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摘要
介绍了大连极地海洋动物馆屋盖结构体系及结构选型依据。其屋盖结构根据建筑造型及功能要求选用了双层网架、单层筒壳、单层球面网壳及锯齿状锥面网壳等4种空间结构体系。重点介绍了锯齿状锥面网壳结构构成;并采用大型通用有限元软件ANSYS对锯齿状锥面网壳部分进行了静力分析及几何非线性稳定分析,得到了此类结构的应力分布、位移分布等静力特性及稳定性能;对结构进行了模态分析,获得了其自振频率、振型等自振特性,为后续对结构进行动力分析提供了基础。结果表明,该结构设计符合规范要求,稳定性良好,适于建筑造型呈锯齿状,屋面恒荷载较小的建筑物屋面。可为今后该类结构的设计提供一定理论依据。
The system of Dalian polar region marine museum roof structure and structure selection was introduced. Double layer grids, single layer cylinder shell, single layer reticulated spherical shell and zigzag cone lattice shell were selected according to the architectural modeling and function requirement. Zigzag cone lattice shell structure was introduced detailedly.Static and stability analysis was carried out using finite element software ANSYS to make clear its characteristic. Through this process, stress distribution and placement distribution, along with stability characteristic were obtained. Meanwhile, natural vibration characteristics including natural frequency and vibration mode were obtained based on modal analysis, paving road for dynamic analysis later. The research demonstrated that the design of this structure satisfied the requirement of Chinese code and showed suitable stability, at the same time, it fit for the roof with zigzag shape and low dead load. Theoretical basis was provided for similar design in the future.
The system of Dalian polar region marine museum roof structure and structure selection was introduced. Double layer grids, single layer cylinder shell, single layer reticulated spherical shell and zigzag cone lattice shell were selected according to the architectural modeling and function requirement. Zigzag cone lattice shell structure was introduced detailedly.Static and stability analysis was carried out using finite element software ANSYS to make clear its characteristic. Through this process, stress distribution and placement distribution, along with stability characteristic were obtained. Meanwhile, natural vibration characteristics including natural frequency and vibration mode were obtained based on modal analysis, paving road for dynamic analysis later. The research demonstrated that the design of this structure satisfied the requirement of Chinese code and showed suitable stability, at the same time, it fit for the roof with zigzag shape and low dead load. Theoretical basis was provided for similar design in the future.
引文
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[3]莫世海,胡刚,梁汉吉,等.南宁国际会展中心展厅屋盖的结构选型和设计[J].建筑结构,2005,35(2):6-9,16Mo Shihai,Hu Gang,Liang Hanji,et al.Design of the roof structure system in Nanning International Convention&Exhibition Center[J].Building Structure,2005,35(2):6-9,16(in Chinese)
[4]GB50009—2001建筑结构荷载规范(2006版)[S].北京:中国建筑工业出版社,2006GB50009—2001Load Code for the Design of Building Structures[S].2006ed.Beijing:China Architecture&Building Press,2006(in Chinese)
[5]JGJ7—2010空间网格结构技术规程[S].北京:中国建筑工业出版社,2010JGJ7—2010Technical Specification for Space Frame Structure[S].Beijing:China Architecture&Building Press,2010(in Chinese)
[6]陈绍蕃.钢结构设计原理[M].北京:科学出版社,2001Chen Shaofan.Principles of steel structure design[M].Beijing:Science Press,2001(in Chinese)
[7]王新敏.ANSYS工程结构数值分析[M].北京:人民交通出版社,2007
[8]陈志华,刘红波,周婷,等.空间钢结构APDL参数化计算与分析[M].北京:中国水利水电出版社,2009
[9]王秀丽,丁南生,崔继付.张弦梁结构的自振特性分析[J].兰州理工大学学报,2006,32(4):105-108Wang Xiuli,Ding Nansheng,Cui Jifu.Analysis of free vibration characteristics of stringed beam structure[J].Journal of Lanzhou University of Technology,2006,32(4):105-108(in Chinese)
[10]秦冬琪,徐永涛,乔天民,等.大跨度锯齿形锥壳屋盖厂房动力实测和地震效应的分析[J].建筑结构学报,1992,13(5):62-70Qin Dongqi,Xu Yongtao,Qiao Tianmin,et al.Dynamic test and seismic response analysis of an industrial building with large span saw-tooth conoidal shell roof[J].Journal of Building Structures,1992,13(5):62-70(in Chinese)
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