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进行了外包钢板混凝土墩柱在车辆碰撞作用下的动力性能模型试验,通过采集撞击过程中的撞击力时程、桥墩的加速度及位移响应时程,分析研究了车速、车辆质量、轴压比等对撞击过程中外包钢板混凝土桥墩动力响应的影响。研究结果表明,撞击力的大小与车速、车辆质量、轴压比均成正相关关系;桥墩的加速度与位移响应均随车速提高而增大,桥墩顶部的加速度可能大于也可能小于撞击位置处的加速度,而桥墩顶部的位移总是大于撞击处的位移;桥墩位移与车辆质量之间近似成线性关系,随轴压比增大而减小。研究结果为进一步研究实际车辆与桥梁撞击及桥梁防撞设计提供了数据参考。
The dynamic performance model of concrete-filled steel plate pier under impact of vehicle is carried out. By collecting the impact duration, the acceleration of bridge piers and the response time of displacement, the vehicle speed, vehicle mass, axial compression ratio and so on Influence of concrete plate pier on the dynamic response of concrete bridge pier during impact. The results show that the impact force has a positive correlation with the vehicle speed, the vehicle mass and the axial compression ratio. The acceleration and displacement response of the piers increase with the increase of the vehicle speed, and the acceleration at the top of the pier may be greater than or may be less than the acceleration at the impact position While the displacement at the top of bridge piers is always greater than the displacement at impact points. The displacement of bridge piers is approximately linear with the vehicle mass, and decreases with the increase of axial compression ratio. The results provide the data reference for further research on the actual vehicle collision with the bridge and the bridge anti-collision design.