拉弯耦合作用下平行钢丝索断丝受力研究  

Broken Wire Mechanical Behavior of Parallel Steel Wire Cable under Combined Tension-bending

作　　者：杨建喜[1] 赵金炎 费宏宇 孙全胜[1] YANG Jianxi;ZHAO Jinyan;FEI Hongyu;SUN Quansheng(School of Civil Engineering and Transportation,Northeast Forestry University,Harbin 150040,China)

机构地区：[1]东北林业大学土木与交通学院,哈尔滨150040

出　　处：《森林工程》2023年第6期177-187,共11页Forest Engineering

基　　金：黑龙江省交通运输厅科技项目(2020HLJ018)。

摘　　要：为研究拉弯耦合作用下平行钢丝索断丝力学行为,依据文献试验数据建立平行钢丝索弯曲精细化有限元模型,并通过试验数据验证,进一步建立拉弯耦合作用下平行钢丝索断丝有限元模型,研究钢丝断裂后平行钢丝拉索跨中截面变形和应力不均匀分布规律。研究结果表明,拉弯耦合作用下平行钢丝索数值模拟结果与试验数据相一致;预拉力平行钢丝拉索断丝后,周围剩余完好钢丝出现应力重分布现象,越靠近断丝位置的钢丝应力越大,随着断丝数量的增加,剩余完好钢丝应力也增加;在断丝后,影响简支边界条件平行钢丝索断丝处变形大小的因素由大到小依次为拉弯耦合作用、预拉力作用、两端自由。In order to study the mechanical behavior of parallel steel wire cable breakage under the action of tension-bending coupling,based on the literature test data to establish parallel steel wire cable bending refinement finite element model,and through the verification of the test data,to further establish parallel steel wire cable breakage finite element model under the action of tension-bending coupling,and to study the deformation of parallel steel wire cable spanning the cross-section of the steel wire breakage and the law of non-uniform distribution of stresses.The results showed that the numerical simulation results of parallel steel wire cable under the action of tension-bending coupling were consistent with the experimental data;after the pre-tension parallel steel wire cable broke,the stress redistribution phenomenon occurred around the remaining intact steel wires,the closer to the location of the broken wire the greater the wire stress,with the increase in the number of broken wires,the remaining intact steel wire stress also increased;after the wires broke,the factors affecting the deformation of the simply supported boundary conditions parallel steel wire cable breakage size in descending order were tension-bending coupling effect,pre-tension effect,and free ends.

关 键 词：拉弯耦合作用 平行钢丝索 断丝 变形 应力重分布 

分 类 号：U443.31[建筑科学—桥梁与隧道工程] U441.4[交通运输工程—道路与铁道工程]