摘要
为了深入研究碳纤维增强树脂(CFRP)缆索悬索桥主索鞍的合理设计参数,首先介绍了复合材料的Tsai-Hill失效准则,并利用解析法推导了主缆在主索鞍处的弯矩估算公式,在此基础上提出了一套关于CFRP缆索悬索桥主索鞍的设计计算方法。然后利用该方法对CFRP主缆上的索鞍性能指标进行了参数分析,研究了主缆丝股直径、索夹间距、索鞍半径、CFRP-钢摩擦系数等设计参数对索鞍受力性能的影响。结果表明:通过减小丝股直径、增大索夹间距、增加索鞍半径等措施,可显著改善主索鞍的受力性能;CFRP-钢摩擦系数应在合理范围内取值,过大或过小都是不利的。
In order to further study the proper design parameters for the saddles of suspension bridges with carbon fiber reinforced polymer （CFRP） cables, the Tsai-Hill failure criterion was firstly introduced, and the formulas for the cable moment at the saddles was derived, based on which the analysis method for the saddles of CFRP suspension bridges was proposed. Then, a parametric study on the mechanical indexes of saddles on the CFRP cable was conducted, where the influences of diameter of cable wire, interval between clips, radius of saddles,friction factor between CFRP and steel were considered. Results show that the mechanics behavior of saddles could be improved significantly by reducing the cable wire diameter, increasing the interval between clips,and increasing the radius of saddles. The friction between CFRP and steel should be chosen within a reasonable range, otherwise negative effects could be caused.
出处
《结构工程师》
北大核心
2017年第4期9-15,共7页
Structural Engineers
基金
国家重点基础研究发展计划(973计划)资助项目(2013CB036303)
关键词
桥梁工程
悬索桥
参数分析
主索鞍
碳纤维
CFRP
bridge engineering, suspension bridge, parametric study, saddle, carbon fiber, CFRP
