索-桁预应力穹顶结构的动力性能研究
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摘要
索-桁结构是一种有潜力的空间结构,但目前的研究尚不够深入.本文提出了一种圆形平面索-桁预应力结构,采用反应谱法和时程法分析,研究了其动力性能.结果表明,该种结构的频谱极为密集,振型较为复杂;这类结构采用反应谱法计算动内力将导致不可接受的误差,而应采用相应的时程分析法计算动内力.同时还得出了这种结构预应力的施加不可缺少,否则将有可能导致动力破坏的结论.
The cable-truss is a potential space structure, but it has not been studied deeply. In this paper, a circular pre-stressed cable-truss structure was presented and its dynamic properties was studied by shapes-separation-spectra and time-history methods. The results showed that the structure's frequencies are crowded and vibration shapes are complex, dynamic internal force of the structure by shapes-separation-spectra-method will cause unacceptable error, so time-history method should be used. Meanwhile, it is necessary for this structure to be pre-stressed, otherwise it may be destroyed in seismic action.
The cable-truss is a potential space structure, but it has not been studied deeply. In this paper, a circular pre-stressed cable-truss structure was presented and its dynamic properties was studied by shapes-separation-spectra and time-history methods. The results showed that the structure's frequencies are crowded and vibration shapes are complex, dynamic internal force of the structure by shapes-separation-spectra-method will cause unacceptable error, so time-history method should be used. Meanwhile, it is necessary for this structure to be pre-stressed, otherwise it may be destroyed in seismic action.
引文
[1] 谢永铸,陈其祖.安徽省体育馆索桁组合结构屋盖设计 与施工[J].建筑结构学报,1989,10(6) :71-79． XIE Yong-zhu, CHEN Qi-zu. Design and construction of cable-truss composite structure roof for Anhui Gymnasium[J]. Journal of Building Structure , 1989, 10(6) . 71-79．
[2] 杨叔庸.潮州体育馆“索桁”组合结构屋盖的设计[A].第六届空间结构学术会议论文集[C].广州:地震出版社,1992． YANG Shu-yong. Cable-truss composite roof design of Chaozhou Gymnasium [A ]. Symposium on The Sixth National Spatial Structure Symposium [C].Guangzhou; Seismic Press, 1992．
[3] 王仕统.索-桁结构的静力分析及动力性能研究[J].建筑结构学报,1999,20(3) :2-7． WANG Shi-tong. Research on static and dynamic properties of a cable-truss structure [J]. Journal of Building Structure , 1999, 20(3) ;2-7．
[4] 王仕统.索桁结构的设计参数探讨[J].建筑结构学报,2001,22(5) :59-61． WANG Shi-tong. Design parameters study on cable-truss structure [J]. Journal of Building Structure,2001, 22(5) :59-61．
[5] CAO Zi, KETTER R L. Seismic modeling of truss stiffened cable systems [J]. International Journal of Space Structures, 1991,6(1) :77-85．
[6] 高博青,董石麟.折板式网壳结构的抗震及减震研究[J].浙江大学学报(理学版),2002,29(5) :589-594． GAO Bo-qing, DONG Shi-lin. Study on aseismic and shook absorption of folded plate latticed shell [J]. Journal of Zhe Jiang University (Science Edition),2002, 29(5) : 589-594．
[2] 杨叔庸.潮州体育馆“索桁”组合结构屋盖的设计[A].第六届空间结构学术会议论文集[C].广州:地震出版社,1992． YANG Shu-yong. Cable-truss composite roof design of Chaozhou Gymnasium [A ]. Symposium on The Sixth National Spatial Structure Symposium [C].Guangzhou; Seismic Press, 1992．
[3] 王仕统.索-桁结构的静力分析及动力性能研究[J].建筑结构学报,1999,20(3) :2-7． WANG Shi-tong. Research on static and dynamic properties of a cable-truss structure [J]. Journal of Building Structure , 1999, 20(3) ;2-7．
[4] 王仕统.索桁结构的设计参数探讨[J].建筑结构学报,2001,22(5) :59-61． WANG Shi-tong. Design parameters study on cable-truss structure [J]. Journal of Building Structure,2001, 22(5) :59-61．
[5] CAO Zi, KETTER R L. Seismic modeling of truss stiffened cable systems [J]. International Journal of Space Structures, 1991,6(1) :77-85．
[6] 高博青,董石麟.折板式网壳结构的抗震及减震研究[J].浙江大学学报(理学版),2002,29(5) :589-594． GAO Bo-qing, DONG Shi-lin. Study on aseismic and shook absorption of folded plate latticed shell [J]. Journal of Zhe Jiang University (Science Edition),2002, 29(5) : 589-594．
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