玻璃幕墙中主体结构对单层索网结构风振响应的影响研究
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摘要
点支式玻璃幕墙单层平面索网结构是一种较典型的风敏感结构,目前对在风荷载作用下,索网结构与主体结构的相互作用问题的研究甚少。采用随机模拟时程分析方法,通过改变主体结构特性、索网结构特性及两者的相对位置关系等多种方式,研究索网结构和主体结构共同工作时的风振响应特性,并与索网单独受力时的风振响应进行对比。分析结果表明,索网和主体结构的风振响应特性存在显著差异,在常见的工程应用参数范围内,主体结构对索网自身的风振响应影响程度较小,因此,对索网结构进行风振响应分析时可以不考虑主体结构的影响。
The wind-induced behaviors of monolayer planar cable net in point-supported glass facade, coupling with the building structure, were studied and compared with those of cable net alone by nonlinear time-domain analysis with random simulation. The influences of changing the properties of building structure, the characters of cable net, and the relative position of cable net and building structure were investigated. It is concluded that there exist extinct differences between the characteristics of wind-induced responses of cable net. For comventional engineering application, the effect of building structure on the wind-induced responses of cable net is very slight, thus wind-induced analysis of cable net can be independently carried out without consideration of the building structure.
The wind-induced behaviors of monolayer planar cable net in point-supported glass facade, coupling with the building structure, were studied and compared with those of cable net alone by nonlinear time-domain analysis with random simulation. The influences of changing the properties of building structure, the characters of cable net, and the relative position of cable net and building structure were investigated. It is concluded that there exist extinct differences between the characteristics of wind-induced responses of cable net. For comventional engineering application, the effect of building structure on the wind-induced responses of cable net is very slight, thus wind-induced analysis of cable net can be independently carried out without consideration of the building structure.
引文
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[2]李创第,李桂青,黄任常.高层建设玻璃幕墙结构地震作用取值研究[J].广西工学院,1997,8(2):9—13.
[3]张杰,吕令毅.点支式玻璃幕墙系统耦合动力分析[J].建筑技术开发,2002,29(5):5—9.
[4]石永久,吴丽丽,王元清.单层索网体系非线性自振特性研究[J].振动工程学报,2006,19(2):173—178.
[5]舒新玲,周岱.风速时程AR模型及快速实现[J].空间结构,2003.12,27—32.
[6]李元齐,董石麟.大跨度空间结构风荷载模拟技术研究及程序编制[J].空间结构,2001.7(3):3—11.
[7]Mario Di Paola,Digital Simulation of Wind Field Velocity[J].Journal of Wind Engineering and Industrial Aerodynam-ics,1998,74~76:91—109.
[8]Iannuuzzi A,and Spinelli P.Artificial wind generation andstructural response[J].Journal of Structural Engineering,1987,112(12):2382—2398.
[9]Iwatani Y.Simulation of multidimensional wind fluctuationshaving any arbitrary power spectra and cross spectra[J].Journal of Wind Engineering,Tokio,Japan,1982,11:5—18.(in Japanses).
[10]John D.Holmes.Wind loading of structures[M].SponPress,London,2001:18—19.
[11]沈世钊,徐崇宝,赵臣,等.悬索结构设计[M].北京:中国建筑工业出版社,2006.
[12]边建烽,魏德敏.大跨空间结构风速时程的数值模拟理论[J].暨南大学学报(自然科学版),2005,26(1):87—90.
[13]赵臣,沈世钊.双曲抛物面鞍形索网风振反应分析[J].哈尔滨建筑工程学院学报,1990,23(2):73—79.
[14]Simiu E.Wind effects on structures[M].John Wiley&Sons,INC.,605 Third Avenue,New York,1996.
[15]刘晶波,杜修力.结构动力学[M].北京:机械工业出版社,2005.
[16]吴丽丽,王元清,石永久.玻璃刚度及节点约束对点支式玻璃单层索网动力特性的影响[J].沈阳建筑大学学报(自然科学版),2005,21(5):432—437.
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