车致气流激励简化算法的参数分析*
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（1 新疆大学建筑工程学院， 乌鲁木齐 830046； 2 北京工业大学空间结构研究中心， 北京 100124）
［摘要］基于车辆从人行天桥下通过的三维流场网格模型，将连续钢箱梁人行天桥车致气流激励的简化算法进行了细化，使这一算法不仅以车速为参数，还考虑了不同车辆尺寸和不同桥面宽度的影响，提出了车高系数、车宽系数及桥面宽度系数，同时得出结论：不同车长时计算得到的车致气流激励对人行天桥振动的影响不大。最后对北京工业大学西门人行天桥进行了现场风压监测，将测点的监测结果与理论分析结果相对比，验证所采用的分析方法的合理性。［关键词］车致振动; 气流激励; 简化算法; 参数分析; 风压监测中图分类号：U448.11 文献标识码：A 文章编号：1002-848X(2016)07-0093-06
Parametric analysis of simplified algorithm of vehicle-induced airflow excitationZhao Rui1, Zhang Yigang2（1 School of Civil Engineering, Xinjiang University, Urumqi 830046, China; 2 Space Structures Research Center, Beijing University of Technology, Beijing 100124, China)Abstract: Based on three-dimensional flow field mesh model that vehicle passed from the pedestrian bridge underneath, simpilfied algorithm of vehicle-induced airflow excitation of continuous steel box girder pedestrian bridge was refined. This method took speed as parameter, and considered the influences of the different vehicle sizes and deck width. Vehicle height coefficient, vehicle width coefficient and deck width coefficient were proposed. Results revealed that vehicle-induced airflow excitation calculated at different vehicle length has little effect on the pedestrian bridge. Finally, Beijing University of Technology, Simon footbridge was monitored on-site for wind pressure, the monitoring results of measuring points compared with the theoretical analysis results to verify the reasonableness of analysis methods.Keywords: vehicle-induced vibration; airflow excitation; simplified algorithm; parametric analysis; wind pressure monitoring
*新疆大学博士毕业生科研启动基金项目（批准号：BS150256）。作者简介：赵锐，博士，讲师，Email:zhaor1999@163.com。
