摘要
以武汉轻轨一号线为工程背景,系统研究列车通过轨道桥梁所引起的振动响应。首先建立轨道梁结构的有限元分析模型和车致振动分析方法。在此基础上,通过数值研究考察轨道梁的振动状况。进一步进行现场实测,获取结构关键部位的实测振动响应,并与理论分析结果进行对比研究。结果表明,所采用的分析模型和分析方法准确可靠,可以有效地反映结构的车致振动响应。相关分析方法可为今后同类轻轨桥梁结构的振动分析所采用。
The investigation on vehicle-induced dynamic responses of box girder is actively carried out in this study by taking the No.1 Line of Wuhan light rail as engineering background. The finite element model and analytical approach for the dynamic responses of the box girder are established. Furthermore,the dynamic responses of the box girder are examined through numerical simulation. The field measurement of the actual structure are carried out to obtain the dynamic responses of the crucial parts and thereby compared with those from numerical analysis. The observations demonstrate that the analytical model and approach utilized in this study is reliable and accurate for evaluating the vehicle-induced dynamic responses of the box girder. The analytical approach can be adopted for the analysis of similar structures in the future.
基金
国家自然科学基金面上项目(50678141)
高等校学校博士学科点专项科研基金(200804970007)
关键词
结构工程
动力响应
车致振动
轻轨结构
现场实测
structural engineering
dynamic response
vehicle-induced vibration
light rail structure
field measurement
作者简介
谢伟平（1965-），男，教授，主要研究方向：车-线-桥系统环境振动评价与控制策略，wpxie@sina．com
