大跨空间结构风振响应及其计算与试验方法

WIND-INDUCED DYNAMIC RESPONSES OF LONG-SPAN SPATIAL STRUCTURES AND THEIR COMPUTATIONAL AND EXPERIMENTAL METHODS

大跨空间结构体系广泛应用于工业和民用建筑中 ,并且日趋大型化、多样化、复杂化。风荷载已成为该类结构抗风设计、防灾减灾分析的控制荷载之一。文中针对大跨空间结构 ,分析了风振形式及其机理 ,阐述了风振响应计算方法和试验方法。指出随机振动理论、有限单元法和数值分析理论是大跨空间结构风振响应计算的有效理论工具 ,风洞试验是研究结构风振的主要实验手段 ,结构风振数值模拟方法具有广阔发展前景。最后 ,提出值得进一步研究的若干问题。

Long_span spatial structures(LSSS)are widely used in building engineering,which are getting larger,more diversified and more complicated.Wind load is one of the dominating loads that must be considered in the design of LSSS's wind_resistance and analysis of disaster reduction and prevention.In the paper,the wind_excited vibration forms and their mechanisms of LSSS are investigated and the computational and experimental methods for wind_induced dynamic response of LSSS are discussed.It is pointed out that random vibration theory,finte element method and numerical analysis theory are effective theoretical tools and wind tunnel test is the major experimental means in the research of wind_induced dynamic responses.It is emphasized that the numerical simulation technique will play more and more important role in the field of the wind_induced vibration of LSSS.Finally,several aspects that should be further studied are suggested.