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该文以某斜拉桥为工程背景,对移动车辆荷载作用下大跨度斜拉桥的行车舒适性进行了研究。利用Midas/Civil建立有限元模型,计算出在不同车速作用下斜拉桥跨中位置的动力响应,其中包括位移、速度以及加速度。根据结构的振动响应,利用舒适度评价指标对斜拉桥进行舒适性研究。结果表明:车速对车辆的行车舒适性有较大的影响,但并非车速越高行车舒适性越低。
Taking a cable-stayed bridge as the engineering background, this paper studies the driving comfort of long-span cable-stayed bridges under the action of moving vehicle loads. The finite element model was established by using Midas / Civil to calculate the dynamic response of the mid-span of the cable-stayed bridge under different vehicle speeds, including displacement, velocity and acceleration. According to the vibration response of the structure, the comfort evaluation index is used to study the comfort of the cable-stayed bridge. The results show that the vehicle speed has a great influence on the vehicle comfort, but not the higher the vehicle speed, the lower the vehicle comfort.