上承式钢管混凝土拱桥车桥耦合研究

Research of vehicle-bridge coupling for deck steel pipe concrete arch bridges

对于车桥耦合振动的研究,目前比较多的是以移动荷载和移动质量这两种简化方法来模拟车辆通过桥梁时的情况,移动荷载简化模型由于计算方便,所以在目前车桥耦合振动分析中应用得比较多,但是由于移动荷载的研究方法没有考虑质量的惯性力的作用,所以该分析方法与实际情况存在一定的差距,本文以落步溪大桥荷载试验为依据,分析了移动荷载作用下桥梁结构的加速度,分析了移动荷载模型这种计算方法对于钢管混凝土拱桥车桥耦合分析的可靠性和适用条件。

The most commonly used methods for research of vehicle-bridge coupling vibration are adopting moving load model or moving mass model to simulate the condition of vehicles passing through bridge. The moving load model is widely used for its convenience of compute, yet due to its eliding of quality inertia force this method exists some difference with the actual situation. Based on the load test of Luobuxi Bridge, the paper studi-es the bridge acceleration under moving load and analyses the reliability and conditions of application for moving load model applied in deck steel pipe concrete arch bridges.