摘要
分析素流风引起香港汀九大跨度斜拉桥的抖振（ｂｕｆｆｅｔｉｎｇ）响应．该斜拉桥是三塔四跨结构，位于台风地区在分析中我们把紊流风化为一系列沿主梁轴线作用的速度时程点，然后把抖振力表示为一系列沿主梁轴线分布并作用在主梁上的荷载时程点，所有时程点实际上都是多维互相关随机过程，而自激力则由脉冲响应函数与主梁位移的卷积给出．本文编制了在时域中分析紊流风引起结构抖振的三维非线性有限元程序，把该三塔四跨四索面双桥面斜拉桥简化为一个空间框架结构，并对此结构进行了抖振响应分析．分析结果与全桥模型风洞试验结果基本相符，这说明分析是成功的，也说明了本文分析方法是合理的和可靠的．
This paper analyses turbulence-induced buffeting response for the Hong Kong TingKau long-span cable-stayed bridge. The bridge which locates in a typhonic area, has 3 towers and4 spans. In this analysis, the wind turbulence is treated as a series of point velocity time historiesalong the axis of the bridge girder. The buffeting load is then expressed as a series of point loadhistories acting on the girder. All the point histories are treated as multi-correlated random pro- cesses. The self-excited forces acting on the girder are given in terms of convolution integrals ofthe impulsive resPOnse function with the girder's motion. A 3-D nonlinear FEM program is de-veloped for turbulence-induced buffeting resPOnse analysis in time domain. The double deckbridge is modeled by a 3-D frame structure, and a response analysis is performed. The results arecompared with those obtained by wind tunnel test of a whole bridge model. A satisfactory agreement has been reached. This shows that the analysis is successful and that the method of analysisas well as the parameter used in the analysis are reasonable and reliable.
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
1999年第11期44-50,共7页
Journal of South China University of Technology(Natural Science Edition)
基金
香港政府路政署及广东省自然科学基金!980634
