人_轨并行自锚式悬索桥稳定承载力研究  

Study on stable bearing capacity of man-rail parallel self-anchored suspension bridge

作　　者：吴鹏辉 WU Penghui(China Railway SIYUAN Survey and Design Group Co.,Ltd.Wuhan,430063)

机构地区：[1]中铁第四勘察设计院集团有限公司桥梁院,武汉430063

出　　处：《铁道勘测与设计》2025年第1期73-79,共7页Railway Survey and Design

摘　　要：自锚式悬索桥以其独特的景观效果、良好的场地适应能力成为城市景观桥梁常用的桥型之一。然而,城市桥梁荷载类型多样,常规线弹性模型难以准确计算其受力特性。本文采用大型通用有限元软件ANSYS建立某景区人_轨并行自锚式悬索桥的精细化有限元模型,考虑几何非线性及材料非线性,对比分析了该桥弹性及弹塑性稳定系数,并计算了恒载作用下活载稳定系数及恒载+活载的整体稳定系数。研究结果表明:相比弹性分析,利用ANSYS等软件对自锚式悬索桥进行非线性分析所得到的结果更为真实准确。本桥在人群_轨交活载下弹性稳定系数大于4,结构整体安全系数为2.8,稳定性能满足规范要求。Self-anchored suspension bridge has become one of the commonly used bridge types in urban landscape bridges due to its unique landscape effect and good site adaptability.However,the load types of urban bridges are diverse,and the conventional linear elastic model is difficult to accurately calculate its mechanical characteristics.In this paper,a refined finite element model of a pedestrian-rail parallel self-anchored suspension bridge in a scenic spot is established by using the large-scale general finite element software ANSYS.Considering geometric nonlinearity and material nonlinearity,the elastic and elastoplastic stability coefficients of the bridge are compared and analyzed,and the stability coefficient of live load under dead load and the overall stability coefficient of dead load+live load are calculated.The results show that compared with elastic analysis,the results obtained by nonlinear analysis of self-anchored suspension bridge using ANSYS and other software are more real and accurate..The elastic stability coefficient of the bridge under the live load of the crowd_rail is greater than 4,the overall safety factor of the structure is 2.8,and the stability performance meets the requirements of the specification.

关 键 词：人_轨并行 自锚式悬索桥 双非线性 稳定 极限承载力 

分 类 号：U44[建筑科学—桥梁与隧道工程]