CFRP斜拉索与钢索风雨激振振动特性对比研究  

A Comparative Study of Wind-rain-induced Vibration Characteristics of the CFRP Cable and the Steel Cable

作　　者：刘荣桂[1] 高莉娜[1] 曹植[1] 谢桂华[1] 蔡东升[1] 陈蓓[1] 

机构地区：[1]江苏大学土木工程与力学学院,镇江212013

出　　处：《结构工程师》2014年第4期67-72,共6页Structural Engineers

基　　金：国家自然科学基金资助项目(51078170)

摘　　要：为探讨碳纤维复合材料(CFRP)索发生风雨激振时的振动特性,基于现场观测及风洞试验结果,运用空气动力学理论建立拉索的动力学方程,采用自编程序进行了数值分析和计算。在此基础上,探讨了拉索风雨激振的致振机理和主要参数对风雨激励下拉索结构响应的影响;分别采用等轴向刚度和等强度准则换索准则推导了碳纤维复合材料(CFRP)索风雨激振的计算模型,并与钢索的计算结果进行了对比分析。结果表明:拉索的风雨激振主要与风速、水线的振幅、阻尼比等因素有关;相同条件下,按等强度准则设计的CFRP索在抑制风雨激振方面性能比钢索更加优越。In order to investigate the wind-rain induced vibration characteristics of the carbon fiber reinforced plastic （CFRP）cable,field observations and the results of wind tunnel tests were presented.Based on the aerodynamics,the cable dynamics was calculated.The exciting incentive theoretical basis and the wind-rain-induced vibration mechanism were explored through numerical analyses.The influence of the main parameters for cable vibration was discussed.A comparison was performed between the results from the CFRP cable and the steel cable.Both the axial stiffness criterion and strength criterion cable were used for model establish-ment.It shows that the cable wind-rain vibration has relationship with wind speed,waterline amplitude and damping ratio.At the same condition,the CFRP cable that was designed according to the strength criterion has a better performance in suppressing wind-rain vibration.

关 键 词：CFRP 斜拉索 风雨激振 理论分析 数值计算 参数对比 

分 类 号：U448.27[建筑科学—桥梁与隧道工程] U441.3[交通运输工程—道路与铁道工程]