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	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
	吴丽丽 ; 王元清 ; 石永久 ; WU Li-li ; WANG Yuan-qing ; SHI Yong-jiu
	2010-07-19 ; 2010-07-19
关键词	单层索网 动力特性 玻璃 刚度 节点约束 有限元计算模型 monolayer cable net,dynamic property,glass,stiffness,joint constraint,FEM model TU382
其他题名	Influence of Stiffness of Glass Panels and Joint Constraints on Dynamic Properties of Monolayer Cable Net for Point-supported Facade
中文摘要	目的研究玻璃质量和刚度及节点约束对单层索网动力特性影响.方法编写了有限元程序求解索网的自振频率.通过单层索网安装玻璃前后频率的比较,分析了玻璃的质量和刚度对自振特性的贡献大小,并研究玻璃和索网节点之间4种节点约束对自振频率的影响.结合北京新保利大厦二期单层索网体系模型的动力特性试验与有限元计算值进行对比分析.结果玻璃质量和刚度对频率变化影响趋势相反,同时节点约束对自振频率具有一定影响,有限元模型与试验结果吻合良好.结论一般情况下,玻璃质量影响大于其刚度影响.玻璃较厚时,其质量和刚度对频率影响的变化幅度大于较薄的情况;对于单层平面索网,节点的平动约束模式对自振频率影响不大,而考虑玻璃胶的扭转约束则对其有一定影响.拉压弹簧的节点约束模式计算结果与试验值较吻合.; Monolayer cable net system for point-supported glass facade has become more and more popular in recent years.The characteristics of dynamic property analysis on pretressed structures are presented in this paper,and finite element program is developed to obtain the frequencies of self-vibration of cable nets.The contributions of mass and stiffness of glass panels to dynamic performance are analyzed by comparison of variations of frequencies of self-vibration before and after the installation of glass panels.Meanwhile,four types of joint connection between cable and glass are introduced to simulate the realistic connections,and their influences on the frequencies of vibration are compared.Experimental study on the dynamic characteristics of a one-tenth scale model of monolayer cable net for glazing in New Poly Plaza of Beijing has also been carried out in this study.The frequencies of cable nets decrease owing to the inclusion of the mass of glass panels,which is in contrast with the effect of the stiffness.Generally,the influence of mass on the frequency of structure is greater than that of the stiffness.The fluctuating amplitude of frequencies due to the influence of mass and stiffness of glass panel is larger for thicker glass panel than for thinner one.Translational constraints between nodes of cable and glass have few effects on dynamic characteristics of planar cable nets,contrary to rotational constraints that are devised to simulate the silicon joint by rotational spring.Results of the constraining connection mode by using translational spring agree with those obtained from the experiment.; 北京市自然科学基金项目(8053021); KGE研究基金项目(200303)
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/74917]
专题	清华大学
推荐引用方式 GB/T 7714	吴丽丽,王元清,石永久,等. 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],2010, 2010.
APA	吴丽丽,王元清,石永久,WU Li-li,WANG Yuan-qing,&SHI Yong-jiu.(2010).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..
MLA	吴丽丽,et al."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".(2010).

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