CFRP索斜拉桥动态特性的有限元分析及动态试验  

Finite element analysis and dynamic test of dynamic properties of the cable stayed bridge using CFRP cables

作　　者：蔡东升[1] 刘荣桂[1] 许飞[1] 周士金[1] 

机构地区：[1]江苏大学理学院,江苏镇江212013

出　　处：《中国工程科学》2010年第2期16-21,共6页Strategic Study of CAE

基　　金：国家自然科学基金资助项目(50678074)

摘　　要：介绍了国内首座CFRP索斜拉桥的工程概况;建立了该桥的三维空间梁壳杆系有限元动态分析模型,进行了结构动态特性有限元分析;进行了环境激励下国内首座CFRP索斜拉桥结构动态特性的测试,结合试验结果对国内首座CFRP索斜拉桥的动态特性进行了分析。同时,将实桥动态试验结果与有限元动态特性分析结果进行了对比分析。结果表明,有限元动态特性分析的低阶频率和振型与试验测得的频率与振型结果基本吻合。笔者等试验及相关研究分析结论可为CFRP索桥梁的动态建模、动态特性分析、抗震抗风设计及CFRP新型缆索材料在桥梁工程中的进一步推广应用提供一定的参考依据。An engineering survey of the first cable-stayed bridge using CFRP cables was firstly introduced;then a three-dimensional computational finite element dynamic model based on beam elements,shell elements and bar elements of above CFRP cable stayed bridge was modeled and a structure dynamic property analysis was put up;lastly a dynamic property test under ambient excitation was put up to analyze the dynamic characteristics of the first cable-stayed bridge using CFRP cables in China,at the same time,a contrast analysis between test results and calculational results of finite element method was presented.The analysis result shows the low order vibratory frequency and mode are basically tallied between test results and calculational results of finite element method.The test and analysis results of this paper could provide reference for dynamic modeling and characteristic analyzing,seismic and wind loads resistance designing of CFRP cable-stayed bridge,also it could provide reference for the further engineering application of CFRP material used as cables on bridge structure by all means.

关 键 词：CFRP索斜拉桥 动态特性 有限元分析 环境激励 动态试验 

分 类 号：TU311.3[建筑科学—结构工程] U448.27[建筑科学—桥梁与隧道工程]