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桥梁不仅要满足行车要求,还必须满足行人和车辆通过时的舒适度要求,评价行车舒适性的标准一般基于车体的振动加速度。该文根据空间整车模型,得到车桥耦合的运动微分方程并编制了车桥耦合分析程序,计算了车辆过桥时车体各个方向的加速度响应;然后把可靠度与行车舒适性结合起来,以ISO 2631指标中的加速度上限值为破坏限值来拟合某一舒适性等级的极限状态方程,根据调查统计得到随机车流的参数分布特征,以某一高墩大跨桥为例,从可靠度角度评价车辆在该桥行驶过程中的舒适性。
The bridge not only meets the driving requirements but also meets the comfort requirements of pedestrians and vehicles. The criteria for evaluating driving comfort are generally based on the vibration acceleration of the vehicle body. According to the space vehicle model, the differential equation of the vehicle-bridge coupling is obtained and the coupling analysis program of the vehicle-bridge is compiled. The acceleration responses of the vehicle body in all directions are calculated. Secondly, the reliability and the driving comfort are combined, The limit state equation of a certain comfort level is fitted with the upper limit value of acceleration in ISO 2631 as the damage limit value. According to the survey statistics, the parameter distribution characteristics of random traffic flow are obtained. Taking a high-rise long-span bridge as an example, The reliability of the vehicle during the assessment of the bridge during the comfort.