中文摘要：

为了从微观交通流模拟和相对应全耦合风-微观交通流-桥梁数值分析框架2个角度对现有风-车-桥耦合振动系统进行精细化改进,首先定义基于元胞自动机（Cellular Automata,CA）原理的三车道微观交通流中车辆换道及行驶规则,并且将实测数据融入所建立的微观交通流模型中;其次建立微观交通流下的风-汽车-桥梁系统分析框架;最后以杭州湾跨海大桥主航道桥为例,计算了风环境下Monte-Carlo方法和CA交通模型模拟的交通流荷载作用下该桥的响应。研究结果表明：对于相同的交通流密度,CA模型计算的桥梁荷载响应变异系数、极值都比Monte-Carlo方法计算的结果小;而对于均值、交通流密度较低时,CA模型计算的结果小,反之,则大。

英文摘要：

In order to improve the current wind-vehicle-bridge coupled vibration system meticulously from two aspects of the microscopic traffic flow simulation and the corresponding numerical analysis framework for the fully-coupled wind-microscopic traffic flow-bridge,firstly,the rules of the lane-changing and vehicle driving in three-lane microscopic traffic flow were defined based on Cellular Automata principle,and the information recorded was integrated into the established microscopic traffic flow model.Secondly,wind-vehicle-bridge system analysis framework under microscopic traffic flow was built up.Finally,taking the main channel bridge of Hangzhou Bay Bridge as an example,the bridge responses were calculated under the combination load of wind and traffics which were simulated using the traditional Monte-Carlo method and CA traffic flow model respectively.The results show that for the same traffic density,the variation coefficients and extreme values of bridge load responses modeled by CA are less than those simulated by Monte-Carlo method.When the traffic density is low,the mean values of the bridge load responses modeled by CA are less than those simulated by Monte-Carlo method.But when the traffic becomes congestion operating state,the result is opposite.