考虑弯曲刚度及边界约束的短索内力识别  

Internal Force Identification of Short Cables Considering Bending Stiffness and Boundary Constraints

作　　者：陈舒婷[1] 吴惠君 范中林[3] 万磊[1] 

机构地区：[1]武汉理工大学交通学院,武汉430063 [2]湖北路桥集团有限公司,武汉430044 [3]十堰市公路管理局,十堰442000

出　　处：《交通科技》2013年第1期13-15,共3页Transportation Science & Technology

摘　　要：对于长度较短的拉索,其弯曲刚度和边界约束对索力的识别结果影响较大。文中针对工程中短索内力的识别,在同时考虑其弯曲刚度及边界约束的情况下,提出了等效长度的概念,利用数值计算方法,将两端固支以及一端固支一端铰支约束下拉索内力识别转换为两端铰支约束下拉索内力识别问题,其既可利用现有拉索内力识别给予的简捷,又可避免求解超越方程所带来的困难,从而可获得较为简单实用的拉索内力识别技术。The internal force identification of short cables may be significantly influenced by the bending stiffness and boundary constraints.In this paper the concept of equivalent length to identify cable internal force,taking bending stiffness and boundary constraints into account is proposed.By using the method of numerical calculation,the problem of identifying internal force of clamped-clamped and clamped-simply supported cables is transformed to the one of identifying internal force of simply-supported cables.It is a relatively simple and practical way which could make use of the simplicity of the present technology as well as avoid the difficulty of solving.transcendental equations.

关 键 词：短索内力 弯曲刚度 边界约束 数值计算 

分 类 号：O174.55[理学—数学]