一座异形斜拉桥的动力有限元模型与验证  

Dynamic finite element model and validation of a special-shaped cable-stayed bridge

作　　者：李志刚[1] 阳霞[2] 任伟新[2] LI Zhigang YANG Xia REN Weixin(CCCC Second Highway Consultants Co. Ltd. , Wuhan 430058, China School of Civil Engineering, Hefei University of Technology, Hefei 230009, China)

机构地区：[1]中交第二公路勘察设计研究院有限公司,武汉430058 [2]合肥工业大学土木与水利工程学院,合肥230009

出　　处：《振动与冲击》2017年第12期55-60,共6页Journal of Vibration and Shock

基　　金：国家青年科学基金项目(51308175)

摘　　要：以一座异形钢结构人行桥为工程背景,探究了一种简洁有效的主梁模拟方法。给出了建立异形斜拉桥动力有限元模型的完整步骤;利用环境振动试验测试的模态结果,验证了所建模型的准确性和建模方法的有效性;运用有限元模型修正技术,对模型参数进行了分析和优化。结果表明该模型能较真实地反映实桥的动力特性,建模方法有很好的工程应用价值。Based on a special-shaped steel pedestrian b r i d g e, the finite m o d e l s of girder w e r e discussed. A concise and effective model of the special-shaped cable-stayed bridge w a s established a n d the procedure of finite ele m e n t m o d e l i n g was presented. The effectiveness of the finite el e m e n t m o d e l of the bridge w a s verified b y a n a m b i e n t vibration test. B y use of the finite element model updating method, parameters of the finite e l e m e n t m o d e l w e r e analyzed a n d optimized. Result shows that the finite element model c a n reflect the bridge in d y n a m i c characteristics accurately. T h e m o d e l i n g m e t h o d is useful in bridge engineering application.

关 键 词：异形斜拉桥 有限元模型 环境振动试验 有限元模型修正 

分 类 号：U44[建筑科学—桥梁与隧道工程]