桥梁半平行钢丝索的对称断丝损伤力学模型  

Damage Model of Multilayered Semi-parallel Wire Cables for Bridges with Symmetric Wire Breaks

作　　者：彭崇梅[1,2] 张启伟[1] 李元兵[2] 

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092 [2]同济大学土木工程学院,上海200092

出　　处：《同济大学学报（自然科学版）》2013年第1期20-26,共7页Journal of Tongji University:Natural Science

基　　金：国家自然科学基金(50978199);土木工程防灾国家重点实验室自主研究课题(SLDRCE09 B 16)

摘　　要：基于Love曲杆理论,考虑钢丝间的接触力、摩擦力和泊松效应对钢丝螺旋半径的影响,建立静力拉伸荷载下半平行钢丝索的对称断丝力学模型,并通过数值计算和参数分析研究断丝后索体内钢丝拉力分布规律.结果表明:钢丝间摩擦系数、断丝径向位置对钢丝拉力分布影响最大.Based on the theory of Love＇s curved bar, the mechanical model for multilayered semi-parallel wire cables under static tensile loads with symmetric wire breaks was derived by taking into consideration the inter-wire contact and friction as well as the Poisson＇s ratio effect on radius of break wire helix. The distribution of wire axial force was studied by numerical calculation and parameter analysis. Results show that the parameters affecting the most the distribution of wire axial force are inter-wire friction coefficients and radial position of break wires.

关 键 词：钢丝索 对称断丝 拉伸荷载 摩擦系数 

分 类 号：U443.38[建筑科学—桥梁与隧道工程]