东南大学学报（自然科学版）2024，Vol.54Issue(4)：952-960,9.DOI:10.3969/j.issn.1001-0505.2024.04.019
实测车流作用下大跨悬索桥吊索疲劳性能分析
Fatigue performance analysis of suspenders of a long span suspension bridge under monitored traffic flow
摘要
Abstract
To study the fatigue performance of suspension bridge suspenders under the long-term action of ve-hicles,taking Nanjing Qixiashan Yangtze River Bridge as the engineering background,the vehicle load model was fitted by finite mixed distribution using the measured data of the weigh-in-motion system of the bridge.Afterwards,the multi-lane random traffic flow on the bridge deck was simulated according to the time weight matrix.The dynamic responses of the bridge under the random traffic flow were calculated using Ansys soft-ware.On these bases,the stress time histories of three typical suspender groups of short suspender,long sus-pender and displacement limiting suspender of the bridge were obtained,and the fatigue performance was ana-lyzed by nominal stress method.Results show that under the action of random traffic flow,the fluctuation of suspender stress keeps relatively stable during most periods.The variation trend of stress of the suspenders is closely related to the change of traffic volume.The maximum stress amplitudes of the short suspender,the long suspender and the displacement limiting suspender are 40,30,and 25 MPa,respectively.Under the long-term action of the traffic flow,the fatigue reliability of the short suspender is significantly lower than those of the long suspender and the displacement limiting suspender.关键词
悬索桥吊索/疲劳性能/动态称重系统/随机车流/动力响应Key words
suspenders of suspension bridge/fatigue performance/dynamic weigh-in-motion system/random traffic flow/dynamic response分类
交通工程引用本文复制引用
茅建校,柯贤东,苏迅,赵楷林,王浩,宗海..实测车流作用下大跨悬索桥吊索疲劳性能分析[J].东南大学学报（自然科学版）,2024,54(4):952-960,9.基金项目
国家重点研发计划资助项目(2022YFB3706704)、国家自然科学基金资助项目(52338011,52108274)、中交集团院士专项资助项目(YSZX-01-2022-01-B)、江苏省重点研发计划(产业前瞻与关键核心技术)资助项目(BE2021021). （2022YFB3706704）
