高速公路桥梁在交通荷载作用下的动力响应统计与分析  

Statistic analysis for dynamic response of an expressway bridge under traffic loading

作　　者：王涛[1] 韩万水[1] 黄平明[1] 

机构地区：[1]长安大学桥梁与隧道陕西省重点实验室,西安710064

出　　处：《振动与冲击》2012年第20期116-120,125,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金资助项目(50808018);中央高校基本科研业务费专项资金项目(CHD2011JC012)

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24小时连续、全面调查,采集了8片梁的5650单车过桥的动响应数据,研究了总交通荷载调查样本中不同梁体的动响应数据的统计规律,然后按车型分类对采集的动力响应数据进行详细细致的统计分析,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。The dynamic response of a bridge under traffic loading is one of vital parameters for vehicle-bridge coupling vibration analysis.Here,a methodology employing a radar speed gun,a video recorder,and a dynamic straino-meter in combination with manually recording was used to continuously and detailed investigate traffic loads on an expressway bridge within 24 hours a day.In this investigation,firstly,the dynamic responses of 8 pieces of beams of the bridge under 5650 individual vehicles driving through the bridge were recorded;secondly,statistic analysis was made for the record of each girder;then,in conjunction with the investigated traffic loading samples,in terms of the vehicle type,some detailed statistic study was conducted for the collected records;and finally,the space-time distribution laws of the dynamic response of the bridge under the traffic loading were studied extensively.The results provided a theoretic guidance and data support for vehicle-bridge coupling vibration studying.

关 键 词：高速公路 交通荷载调查 动力响应 多峰分布 

分 类 号：U441[建筑科学—桥梁与隧道工程]