冲击荷载作用下高桩码头结构的动力响应分析

摘要

采用数学理论推导与动力时程仿真计算相结合的方式，对靠泊船舶撞击作用下高桩码头结构的动力响应及动力放大效应进行了研究，获得了多自由度结构在单点冲击荷载作用下的动力响应公式，推荐了数值计算时船舶撞击荷载的时程曲线类型及持时，获取了船舶靠泊撞击荷载下高桩码头结构的动力放大效应规律。计算与分析结果表明：码头结构设计时船舶撞击荷载的取值应充分考虑码头结构的动力放大效应；靠泊船舶撞击下的高桩码头结构对撞击荷载的动力放大系数推荐为2.0。%Based on the theoretic derivation and dynamic time-history simulation method, the study was carried out on dynamic response and amplification effect of high-piled wharf excited by ship impact. From the research, the accurate structural dynamic response function, the time history type of ship impact and its duration were proposed, and the dynamic amplification principle of high-piled wharf was acquired. The results of calculation and analysis prove that the structural dynamic effect to ship impact load can not be ignored when designing high-piled wharf. And the amplification factor of high-piled wharf to ship impact load is about 2.0.