考虑刚度及边界条件的短索索力求解与试验研究  

Practical solving method and experimental study for short cable tension in consideration of cable stiffness and boundary conditions

作　　者：石春香[1] 李胡生[1] 林立 

机构地区：[1]上海应用技术学院土木建筑与安全工程学院,上海200235 [2]深圳市摩比天线有限责任公司,广东深圳518057

出　　处：《地震工程与工程振动》2010年第2期86-91,共6页Earthquake Engineering and Engineering Dynamics

基　　金：上海市科委重点科技攻关项目(072105115)

摘　　要：建立了一个非齐次边界拉索力学模型,基于拉索线性振动理论,推导了考虑拉索抗弯刚度及边界条件的拉索频率方程;根据双曲函数的数理特性对频率方程进行了合理简化,得到了实用的频率简化方程,提出了逆过程求解索力的方法和步骤,并探讨了不同支承刚度对索力的影响。设计了室内拉索试验模型并进行了27种工况索力试验,比较了不同工况下的计算索力与实际索力,验证了本文提出的频率简化方程和逆过程求解方法的实用可靠性。A cable model on inhomogeneity boundary was built.And according to this universal model,the frequency equation in consideration of cable stiffness and boundary conditions was formulated on the basis of the linear vibration theory of stayed cable.The frequency equation respectively under boundary conditions was simplified according to the mathematical characteristics of hyperbolic functions.The practical solving method and the steps of the cable tension were proposed by a converse process,and the influence of supporting stiffness on cable tension was discussed.An experimental cable model was designed,and a series of experiments were conducted to compare the calculated cable tension with the practical cable tension in 27 different work conditions,which verified that the simplified frequency equation and the converse process solution method presented in this paper are practical and dependable.

关 键 词：桥梁工程 索力 边界条件 频率方程 

分 类 号：P315.952.2[天文地球—地震学] U445.7[天文地球—固体地球物理学]