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为研究CFRP主缆在鞍座及索夹处的抗弯折性能,首先理论分析CFRP主缆的抗弯折性能取决于所用材料即CFRP丝,然后分析CFRP丝在鞍座及索夹处两种不同的弯折变形状态及内力分布,推导抗弯折效率的计算公式,并对各影响因素进行参数分析,最后针对不同工况,对CFRP丝在鞍座和索夹处的抗弯折性能分别进行试验研究。理论与试验分析结果表明:CFRP丝半径与弯折半径的比值与抗弯折效率呈线性关系,比值越小,抗弯折效率越高;抗弯折效率还受弯折包角、CFRP丝的极限应变的影响,尤其当CFRP丝半径与弯折半径的比值较大时抗弯折效率对这些因素的敏感度较高;鞍座与索夹处CFRP主缆均能达到90%以上的抗弯折效率;理论分析与试验结果能够较好吻合。
In order to study the flexural performance of the CFRP main cable at the saddle and the cable clamp, the flexural performance of the CFRP main cable is first theoretically determined by the material used, that is, the CFRP wire, and then the CFRP wire is analyzed at the saddle and the cable clamp Different bending deformation state and internal force distribution, the calculation formula of the bending resistance is deduced, and the parameters are analyzed. Finally, according to the different working conditions, the bending resistance of the CFRP wire in the saddle and the cable clamp respectively Conduct experimental research. Theoretical and experimental results show that the ratio of radius to bending radius of CFRP has a linear relationship with the bending resistance. The smaller the ratio is, the higher the bending resistance is. The bending resistance is also affected by bending angle, CFRP yarn Especially when the ratio of the radius of the CFRP wire to the bending radius is larger, the bending resistance efficiency is more sensitive to these factors; the CFRP main cable between the saddle and the cable clip can achieve more than 90% bending resistance Fold efficiency; theoretical analysis and test results can be better consistent.