中文摘要：

车辆行驶引起的桥梁振动的动力响应数据是车桥耦合振动分析中重要参数。采用超声波测速仪、录像机及桥梁动态测试仪同人工记录相结合的方法,对高速公路交通荷载各要素进行24h连续、全面调查,记录的数据包括车型、车速、行驶车道、车辆到达时间以及每辆过桥车辆引起的桥梁动力响应数据。本调查采集了8片梁的5 650单车过桥的动响应数据,研究了交通荷载调查样本中不同梁体的动力响应数据的统计规律,全面分析了高速公路交通荷载车辆过桥引起的桥梁动力响应的时空分布规律。研究结论能够给车桥耦合振动研究及相关研究提供有益的理论指导和数据支持。

英文摘要：

Nowadays, with the rapid development of the traffic infrastructure construction and the growing of the traffic flowing and speed, the vehicle-bridge coupling vibration research has become the focus of the bridge engineering study. The dynamic response of the bridge under the traffic flowing is one of vital parameters for the vehicle-bridge coupling vibration analysis. In this paper, a methodology, employing radar speed gun, video recorder, and dynamic strain tester in combination with manually recording, was used to continuously and detailedly investigate the traffic loads on the expressway bridge within 24 hours a day. With this approach, all the critical pa rameters, such as vehicle type, speed, traffic lane, the arriving time of the traffic and the bridgevehicle dynamic interaction,were recorded. In this investigation, firstly the dynamic responses of 8 beams of the bridge under 5 650 individual vehicles driving through the bridge were recorded, secondly statistics analysis was made for the record of each beam, and finally the space-time dis tribution laws of the dynamic response of the bridge under the traffic flowing were studied exten sively. The result of this study could provide helpful theoretic guidance and supporting data for tt;e vehicle-bridge coupling vibration research.