中文核心期刊
CSCD来源期刊
中国科技核心期刊
RCCSE中国核心学术期刊

重庆交通大学学报(自然科学版) ›› 2022, Vol. 41 ›› Issue (05): 74-81.DOI: 10.3969/j.issn.1674-0696.2022.05.11

• 交通基础设施工程 • 上一篇    下一篇

基于风-车-桥耦合振动的斜拉桥结构响应分析及行车评价

宋腾腾1,2,荆国强3,4,吴肖波3,4,汪正兴3,4,严超5   

  1. (1. 温州市市政工程建设开发有限公司,浙江 温州 325002; 2. 温州市七都大桥北汊桥建设有限公司,浙江 温州 325088; 3. 中铁大桥科学研究院有限公司,湖北 武汉 430034;4. 桥梁结构健康与安全国家重点实验室,湖北 武汉 430034; 5.长安大学 公路学院,陕西 西安 710064)
  • 收稿日期:2020-10-26 修回日期:2021-03-10 发布日期:2022-05-26
  • 作者简介:宋腾腾(1993—),男,湖北孝昌人,高级工程师,主要从事桥梁结构方面的研究。E-mail:songtenten@qq.com 通信作者:严超(1994—),男,四川绵阳人,硕士,主要从事桥梁结构减振优化方面的研究。E-mail:changanbridge@chd.edu.cn
  • 基金资助:
    国家自然科学基金项目(211021180357)

Structural Response and Driving Evaluation of Cable-Stayed Bridge Based on Wind-Vehicle-Bridge Coupling Vibration

SONG Tengteng1,2, JING Guoqiang3,4, WU Xiaobo3,4, WANG Zhengxing3,4, YAN Chao5   

  1. (1. Wenzhou Municipal Engineering Construction and Development Co., Ltd., Wenzhou 325002, Zhejiang, China; 2. Wenzhou Qidu Bridge Beichaqiao Construction Co., Ltd., Wenzhou 325088, Zhejiang, China; 3. China Railway Bridge Science Research Institute Co., Ltd., Wuhan 430034, Hubei, China; 4. National Key Laboratory for Bridge Structural Health and Safety, Wuhan 430034, Hubei, China; 5. School of Highway, Changan University, Xian 710064, Shaanxi, China)
  • Received:2020-10-26 Revised:2021-03-10 Published:2022-05-26

摘要: 为实现风和随机车流联合作用下斜拉桥结构响应分析及行车舒适性、安全性评价。首先,完善了风-车-桥耦合振动分析系统;其次,采用改进谐波合成法进行全桥三维风场模拟,分析了风和随机车流联合作用下的结构及车辆动力响应;最后,建立了行车安全性与舒适性评价准则,分析了风速、车速及路面粗糙度等对行车舒适性的影响,并联合车速及风向参数确定了高厢货车的行车事故临界风速。结果发现:密集运行状态下桥梁结构及高厢货车动力响应均大于稀疏运行状态,密集运行状态随机车流中高厢货车横向舒适性随风速的增大而降低,竖向舒适性随车速的增大及路面粗糙度水平的恶化而降低,其1/3倍频加速度RMS指标峰值影响范围介于2~10 Hz,均满足行车舒适性要求,基于所建立的分析流程,可确定特定车速与风偏角下的行车事故临界风速,车速为60 km/h、风偏角为70°时,行车事故临界风速为23.7 m/s。

关键词: 桥梁工程;斜拉桥;风-车-桥耦合系统;舒适性评价;安全性评价

Abstract: To realize the structural response analysis and driving comfort and safety evaluation of cable-stayed bridge under the combined action of wind and random traffic flow, the wind-vehicle-bridge coupling vibration analysis system was firstly improved. Secondly, the improved harmonic synthesis method was adopted to simulate the three-dimensional wind field of the whole bridge, and the dynamic responses of structure and vehicle were analyzed under the combined effect of wind and random traffic flow. Finally, driving safety and comfort evaluation criteria were established, and the influences of wind speed, vehicle speed and road surface roughness on driving comfort were investigated. Combined with the parameters of speed and wind direction, the critical wind speed of high compartment truck was determined. The results show that the dynamic response of bridge structure and high compartment truck in dense operation state is greater than that in sparse operation state. In the random traffic flow of dense operation state, the lateral comfort of high compartment trucks decreases with the increase of wind speed, and the vertical comfort decreases with the increase of vehicle speed and the deterioration of pavement roughness level. Its 1/3 frequency acceleration RMS index peak influence range is between 2~10 Hz, which meets the requirements of driving comfort. Based on the established analysis process, the critical wind speed of driving accident under specific speed and wind deflection angle can be determined. When the speed is 60km/h and the wind deflection angle is 70°, the critical wind speed of driving accident is 23.7m/s.

Key words: bridge engineering; cable-stayed bridge; wind-vehicle-bridge coupling system; driving comfort evaluation; safety assessment

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