基于ANSYS/LS-DYNA的水平荷载作用下拱式纵梁码头叉桩布置研究

摘要

As a new type of wharf construction, mechanical characteristics of wharf with arched longitudinal beams are to be analyzed.Three-dimensional solid model of wharf with arched longitudinal beams was built by finite element software ANSYS/LS-DYNA.P-y curve was used to simulate interaction of pile and soil.The effect of tor-sional-angle and batter-pile layout form to dynamical response of wharf were calculated and analyzed.The results show that setting batter-pile is an efficient and necessary way to decrease the global displacement of wharf.Setting 15 °torsional-angle as the optimum angle can make sure the monolithic stability of wharf structure and it can be de-fined as the most suitable torsional-angle.The connection of abutment and piles and the connection of abutment and topside structure are the most possible places that stress concentration occurs, therefore, local reinforcement at these two places is suggested.The results may provide a reference for the application of wharf with arched longitudi-nal beams in engineering.%拱式纵梁码头作为一种适用于深海的新型码头形式,其受力特性和部件结构需进行相关计算分析.文章基于ANSYS/LS-DYNA有限元分析软件,通过p-y曲线理论所建立的土弹簧模拟桩土相互作用,建立了拱式纵梁码头结构三维有限元数学模型.计算并分析了船舶水平撞击力作用下,叉桩扭角角度和叉桩布置位置分别对该码头结构受力特性的影响程度.研究结果表明:设置叉桩可有效减小码头的整体水平位移,在必要工程中拱式纵梁码头设置叉桩是必要的,且叉桩扭角取15°能充分发挥码头各部件受力性能,可定为最优扭角角度;拱式纵梁码头在受到船舶撞击力作用时,基桩与墩台连接处、墩台与上部结构连接处易发生应力集中,施工时应进行局部加固处理,预防连接段的应力损伤.文章的研究成果可为拱式纵梁码头今后的实际工程应用提供依据.