桥墩复合材料防车撞结构碰撞性能试验研究

Experimental study on performance of composite protection structure for bridge pier against vehicle collision

针对桥墩车辆碰撞的问题,设计了钢夹层和蜂窝复合材料相结合的桥梁防车撞吸能结构.为研究耐撞性能进行了材料性能试验和全尺寸防撞结构的碰撞试验,试验得到最大碰撞力为547.6 kN.通过对比试验获得碰撞响应与规范设计值,得出试验结果满足碰撞条件容差要求,可用于后期的数值模型验证,为类似吸能结构的设计提供参考.钢夹层-复合材料桥梁防车撞吸能结构可以减小桥墩的局部损伤和整体破坏,从而达到保护桥墩的目的.

To solve the problem of bridge protection under vehicle collision,an anti-collision structure with steel sandwich and honeycomb composite was designed.The impact experiment with full scale prototype was carried out to investigate the performance and crashworthiness of the anti-collision structure.The maximum impact force obtained in test was 547.6 kN,with the comparison of test impact response and specification design value.Results show that the experimental system meets the demand of tolerance of impact conditions,which can be further used to the calibration of FE（finite element） model as the reference of design for the similar energy absorption structure.The proposed energy absorption structure with steel sandwich and composite could reduce the risk of local damage and collapse of bridge pier against vehicle collision and then achieve the aim of protecting the bridge.