频率法测试系杆拱桥吊杆索力影响因素研究  

Study on Influencing Factors of Suspender Force Test for Tied Arch Bridge by Frequency Method

作　　者：代金鹏[1] 王起才[1] 张戎令[1] 武庆喜[1] 杨阳[1] 

机构地区：[1]兰州交通大学土木工程学院,甘肃兰州730070

出　　处：《施工技术》2014年第17期70-72,共3页Construction Technology

基　　金：长江学者和创新团队发展计划(IRT1139);兰州交通大学青年科技基金(2012028)

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。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.

关 键 词：桥梁工程 系杆拱桥 索力 频率法 边界条件 

分 类 号：U448.225[建筑科学—桥梁与隧道工程]