为了实现操作性强、精度高的在役拉索索力识别，考虑拉索的预应力刚化效应和静力平衡原理，提出了一种基于静态测试手段的在役拉索索力识别方法。通过对索力识别过程及其关键技术的分析，提出了内衬采用软金属的复合索夹型式，并采用显式非线性动态分析法分析了索夹与拉索之间的接触变形演化规律，研究了摩擦力随夹紧力的变化规律，从理论上阐明了该方法的科学性和可行性。因索力的获得只与施力点位移和施力大小有关。避免了常用索力测定方法测量精度受拉索边界条件及材料参数取值影响较大的问题，为柔性拉索的索力识别提供了一种新的思路。

To identify the tension of in-service cable expediently and accurately, a cable tension identification method based on static testing measures is proposed by taking cable stress stiffening effect and principle of static equilibrium into account. According to the analysis on the process of cable tension identification and the key technique, a new compound clamp type with the soft metal lining is proposed. The rule of the contact distortion evolvement between the clamp and the cable is analyzed by dynamic nonlinear explicit analysis method, and the law of the friction change following the clamping force is studied. Thus, the reasonability and feasibility of this method is theoretically illuminated. The identified tension only depends on the displacement of load application point and the load force. The proposed method avoids the drawback of normal cable measuring methods where the measuring accuracy is greatly affected by cable boundary conditions and values of material parameters. The tension measured in the method is only related to the displacement of force point and the value of force. Therefore, it provides a new idea for cable tension identification of flexible cable.

国家杰出青年科学基金资助项目（51025829）；国家“十二五”科技支撑计划子课题（2011BAJ09B03-04）