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中文摘要：
建立考虑吊杆轴向力影响的振动微分方程，对边界条件及吊杆计算长度两影响因素进行研究。基于频率法测试系杆拱桥吊杆索力原理，引入吊杆计算长度修正系数概念，将吊杆两端复杂的边界条件动力等效成两端铰接，并拟合出吊杆计算长度修正系数计算公式。将该式用于实桥吊杆索力测试，计算精度较高，满足工程要求。
英文摘要：
The vibration differential equation considering the effect of axial force is established, the boundary conditions and the calculation length are studied. According to the principle of the method of frequency measurement of cable force for tied arch bridge, this paper introduces the concept of suspender length correction factor, the complex boundary conditions of the both end dynamic equivalent into both hinged hinged model, and fitting the correction factor formula to calculate the length of suspender. The formula is applied to real bridge suspender cable force testing, in which the tested results are satisfied with the engineering requirements.
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