菜园坝大桥施工阶段的抖振时域分析  

Time-Domain Analysis of Buffeting Response of Caiyuanba Changjiang River Bridge at Construction Stages

作　　者：张亮亮[1] 曾永平[1] 李正良[1] 晏致涛[1] 

机构地区：[1]重庆大学土木学院,重庆400045

出　　处：《桥梁建设》2006年第2期1-3,10,共4页Bridge Construction

基　　金：重庆大学创新基地基金项目(200504Y1B0210128);高等学校博士学科专项科研基金项目(2005061102)

摘　　要：重庆菜园坝长江大桥是钢箱系杆拱、桁梁的组合结构拱桥,其施工阶段的刚度与使用阶段相比要小得多。为避免抖振引起的施工安全问题,在利用线性滤波器中的AR模型进行了三维脉动风场模拟的基础上采用时域分析法对各施工工况下的抖振响应进行了分析,所得结果可直接用于工程设计和施工控制,也可为今后该类桥梁的设计和施工提供参考。Caiyuanba Changjiang River Bridge in Chongqing is a hybrid structure arch bridge composed of steel box tied arch and steel truss girder. The rigidity of the Bridge at construction stages is much less as compared to that at service stage. To avoid construction safety problems due to buffeting, the time-domain analysis method is used to analyze the buffeting response of the Bridge at various construction stages on the basis of simulation of three-dimensional turbulence wind field by AR model in the linear wave filters. The results of the analysis can be directly used for engineering design and construction control, and can also provide reference for the design and construction of other similar bridges in the future.

关 键 词：拱桥 长跨桥 抖振 时域分析 脉动风 

分 类 号：U448.22[建筑科学—桥梁与隧道工程]