广州新光大桥良态及台风气候抖振试验研究
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摘要
采用Monte-Carlo台风随机模拟算法模拟台风风场特性并根据风荷载规范良态气候风环境参数建议的取值,在大气边界层风洞中利用被动紊流发生装置再现了广州新光大桥桥位处良态和台风两类气候模式风环境特征,详细比较了两类风环境新光大桥施工和运营状态、设计风速等因素对于新光大桥跨中主梁、主拱肋和施工塔架风致抖振响应的差异,初步解释了抖振响应差别的主要原因。
With the help of Monte Carlo stochastic simulation algorithm for strong typhoon and wind environment parameters suggested by Chinese wind loading codes for normal climate mode,two types of wind environment characteristics about typhoon climate and normal climate were calculated.Then it was demonstrated with passive turbulence generator in atmospheric boundary layer wind tunnel TJ-3 at Tongji University.For Guangzhou Xinguang arch bridge located in the Southeast coastlines prone to strong typhoons at constructing and working stages,wind-induced vibration responses under various wind parameters,such as basic design wind velocity,wind profile and various turbulent degree,etc.,were compared in detail for bridge girder and arch in mid-span and high rise steel tower used for building.Some phenomena about buffeting response difference mechanism were finally explained.
With the help of Monte Carlo stochastic simulation algorithm for strong typhoon and wind environment parameters suggested by Chinese wind loading codes for normal climate mode,two types of wind environment characteristics about typhoon climate and normal climate were calculated.Then it was demonstrated with passive turbulence generator in atmospheric boundary layer wind tunnel TJ-3 at Tongji University.For Guangzhou Xinguang arch bridge located in the Southeast coastlines prone to strong typhoons at constructing and working stages,wind-induced vibration responses under various wind parameters,such as basic design wind velocity,wind profile and various turbulent degree,etc.,were compared in detail for bridge girder and arch in mid-span and high rise steel tower used for building.Some phenomena about buffeting response difference mechanism were finally explained.
引文
[1]Sharma R N,Richards PJ.Are-examination of the characteristics of tropical cyclone winds[J].Journal of Wind Engineering and Industrial Aero-dynamics 1999,83:21-33.
[2]Australian Standard AS1170.2-1989,Minimum design loads on structures[S].
[3]赵林,葛耀君,宋丽莉,等.广州地区台风Monte Carlo随机模拟研究[C].西安:第十二届全国结构风工程学术会议论文集,2005.
[4]赵林,朱乐东,葛耀君.上海地区台风风特性Monte Carlo随机模拟研究[C].上海:国际超高层建筑建造技术研讨会,2006.5.
[5]赵林,葛耀君,项海帆.台风随机模拟与极值风速预测应用[J].同济大学学报,2005,33(7):885-889.
[6]梁剑青,欧进萍,大跨斜拉桥桥面风致抖振的黏滞阻尼控制分析[J].地震工程与工程振动,2006,26(1):139-144.
[7]赵林,葛耀君,项海帆.台风风场随机参数敏感性分析[J].同济大学学报,2005,33(6):727-731.
[8]GB 50009-2001,建筑结构荷载规范[S].
[9]《公路桥梁抗风设计指南》编写组.公路桥梁抗风设计指南[M].北京:人民交通出版社,1996.
[2]Australian Standard AS1170.2-1989,Minimum design loads on structures[S].
[3]赵林,葛耀君,宋丽莉,等.广州地区台风Monte Carlo随机模拟研究[C].西安:第十二届全国结构风工程学术会议论文集,2005.
[4]赵林,朱乐东,葛耀君.上海地区台风风特性Monte Carlo随机模拟研究[C].上海:国际超高层建筑建造技术研讨会,2006.5.
[5]赵林,葛耀君,项海帆.台风随机模拟与极值风速预测应用[J].同济大学学报,2005,33(7):885-889.
[6]梁剑青,欧进萍,大跨斜拉桥桥面风致抖振的黏滞阻尼控制分析[J].地震工程与工程振动,2006,26(1):139-144.
[7]赵林,葛耀君,项海帆.台风风场随机参数敏感性分析[J].同济大学学报,2005,33(6):727-731.
[8]GB 50009-2001,建筑结构荷载规范[S].
[9]《公路桥梁抗风设计指南》编写组.公路桥梁抗风设计指南[M].北京:人民交通出版社,1996.
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