分别进行了普通钢筋混凝土桥墩和外包钢板混凝土桥墩在车辆碰撞作用下的动力性能模型试验,通过实测撞击力时程、桥墩的加速度以及钢筋的应变时程响应并进行对比分析,研究了外包钢板对提高桥墩防撞能力的效果。研究结果表明,外包钢板混凝土墩柱的车辆撞击力、撞击部位的加速度均小于普通钢筋混凝土墩柱的相应值,桥墩根部钢筋的峰值压应变也大幅度降低,说明采用外包钢板的方法可以有效减少车辆对桥墩的撞击作用,从保护桥墩结构本身的角度来说是一种有效的方法。
Abstract
Dynamic performance model tests were conducted on an ordinary RC pier and a steel encased concrete pier under vehicle collisions, respectively. Through measuring and comparatively analyzing impact force time history curves, pier acceleration and reinforcement strain time history curves, the effect of the encased steel plate on improving the pier’s anti-collision ability was studied. The results showed that vehicle impact force and pier acceleration at the impact position of the steel encased concrete pier are less than those of the ordinary RC pier, and the reinforcement peak compressive strain at the pier root also greatly reduced; so, the encased steel plate can effectively reduce vehicle impact actions exerted on bridge piers, therefore it is an effective method to protect pier structures from vehicle impacts.
关键词
撞击性能 /
车辆 /
桥墩 /
外包钢板 /
试验分析
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Key words
impact performance /
vehicle /
bridge pier /
encased steel plate /
reinforced concrete (RC)
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