期刊论文

Zhang, Xun(zhangxun_gz@163.com)

中文

桥梁建设

1003-4722

2023

53

1

78-86

10.20051/j.issn.1003-4722.2023.01.011

湖南省科技创新计划项目 湖北省技术创新专项重大项目 国家自然科学基金

本校为其他机构

为研究桥上风屏障局部破坏对桥梁列车行车安全性的影响,以某四塔公铁两用斜拉桥为背景,进行列车动力响应和行车安全性影响参数分析。推导列车通过风屏障破坏段时车辆和桥梁的风荷载,并通过桥梁和列车节段模型风洞试验,测得计算所需气动力系数;在此基础上建立风-车-轨-桥耦合振动模型,研究了风屏障破坏段长度、平均风速和列车车速对列车动力响应及行车安全的影响。结果表明:突风效应会导致列车横向位移达到最大值,遮风效应会使列车横向加速度达到最大值;随风屏障破坏段长度、平均风速和列车车速的增加,列车动力响应随之增加;风屏障破坏会增加列车的轮重减载率和脱轨系数,并且高风速下各节车辆在风...

The impact of local damage of wind barriers on the running safety of trains on bridge is studied. Based on an existing four-pylon rail-cum-road cable-stayed bridge, the dynamic responses of trains and influential factors of train running safety are analyzed. The wind loads on the train and the bridge when the train is passing through the deck with damaged wind barriers are derived. Segmental wind tunnel tests of the bridge and train were conducted to obtain the required aerodynamic coefficients, with which，a wind-vehicle-track-bridge coupling ...