摘要
研究目的:随着超高层建筑的高度和高宽比的不断增大,建筑材料向着轻质高强方向发展,结构体系的复杂化,致使超高层建筑在台风作用下产生剧烈摆动,因此台风作用下超高层建筑的动力响应时频分析,对于超高层建筑设计参数的选取、现役超高层建筑响应的预测、增加超高层建筑模态参数的资料以及设计准确性的校验都有非常重要的意义。研究结论:通过实测台风作用下超高层建筑的动力响应,可以获得结构的动力特性,并可评价结构风致振动响应的可靠度。台风作用下超高层建筑的动力响应时频分析主要有3种方法:傅立叶变换、小波变换、希尔伯特-黄变换。本文详细阐述了台风作用下超高层建筑动力响应的这3种时频分析方法,并总结出其优缺点,进而对该研究领域的进展作了展望。
Research purposes： With the height and ratio increasing, material being low - weight and high strength, structure system being complex, super - tall building always suffer acute swing under typhoons. So it is extraordinary importance to choose design parameters, forecast structure response, reinforce data of modal parameters, verify design veracity that time -frequency analysis of dynamic responses for supertall buildings under typhoons.
Research conclusions： By resorting to full - scale measurements of typhoon effects on a super - tall building, the dynamic characteristics of the super - tall building can be obtained with the measured data. Meanwhile, an evaluation may be carried out on the reliability of typhoon - induced responses. The time - frequency analysis methods of typhoon - induced responses of super - tall buildings mainly include the Fourier transform, wavelet transform, and Hilbert - Huang transform （HHT）. This paper demonstrates 3 methods mentioned above in detail to summarize their advantages and disadvantages and to further prospect the trends of future researches in this domain.
出处
《铁道工程学报》
EI
北大核心
2008年第7期94-97,106,共5页
Journal of Railway Engineering Society
基金
国家自然科学基金资助项目(50578092)
