悬索桥主缆与索鞍间侧向传力的数值分析  

Numerical Study on Lateral Force Transmission Between Main Cable and Saddle of Suspension Bridges

作　　者：王路 谭正军 古松[1] 李明骏 WANG Lu;TAN Zhengjun;GU Song;LI Mingjun(School of Civil Engineering and Architecture,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China;Sichuan Zhentong Inspection Co.,Ltd.,Mianyang 621000,Sichuan,China)

机构地区：[1]西南科技大学土木工程与建筑学院,四川绵阳621010 [2]四川振通检测股份有限公司,四川绵阳621000

出　　处：《西南科技大学学报》2024年第2期68-73,共6页Journal of Southwest University of Science and Technology

基　　金：国家自然科学基金(52208209);四川省科技计划项目(2022ZYDF083,2023NSFSC0891);广东省基础与应用基础研究基金(2020A1515110240);西南科技大学博士基金(22zx7122)。

摘　　要：悬索桥主缆与索鞍间依靠挤压接触维持联结,但目前缆-鞍间侧向传力机制不明导致结构设计困难。构建了鞍槽内足量钢丝离散体的数值分析模型,并据此开展了关键参数影响分析。结果表明:侧向压力随深度表现出负指数型收敛分布,底部钢丝因槽底的支撑作用会出现侧向压力骤减;钢丝的排列方式对侧向力影响明显,细长排列会减小对应深度的侧向压力,但会增加总体侧向力;摩擦系数越大,侧向压力越小,显示出明显的负相关关系;在常规范围内设定钢丝的弹性模量及泊松比对侧向力影响微小。研究结果可为悬索桥索鞍结构设计及抗滑稳定性验算提供参考。The main cables and saddles of suspension bridges rely on compression contact to maintain their connection,but the transmission mechanism of lateral force between cables and saddles is currently unclear,which makes the structural design difficult.For this reason,a numerical model of sufficient discrete steel wires inside saddle groove was constructed,and an analysis of the influence of key parameters was carried out accordingly.The results indicate that the lateral pressure shows a negative exponential convergence distribution with depth,and a sharp reduction in lateral pressure occurs at the bottom steel wires due to the support of the saddle groove bottom.The arrangement of steel wires significantly affects the lateral force.Elongated arrangements reduce the lateral pressure at corresponding depths but increase the overall lateral force.A higher friction coefficient results in lower lateral pressure,demonstrating a clear negative correlation.Setting the elastic modulus and Poisson’s ratio of steel wires has minimal impact on lateral forces.The findings provide a reference for the design of saddle structures and the verification of anti-slip stability for suspension bridges.

关 键 词：悬索桥 主缆 索鞍 侧向力 数值分析 

分 类 号：U488.25[交通运输工程—载运工具运用工程]