【摘要】 U型预应力混凝土板桩作为一种新型预制构件,首次应用于滩涂促淤坝体结构,其受力状态不同于挡土结构。本文结合实际工程采用LS-DYNA软件进行三维数值模拟分析,分析其在波浪荷载作用下的动力响应,探讨了设置桩土接触面、在板桩顶部设置帽梁等处理方式的影响,以期对其设计进行优化并推广应用。分析结果表明,U型预应力混凝土板桩应用于促淤坝时具有良好的整体稳定性和力学性能,桩身最大拉应力出现在泥面处附近,且可在桩顶设置帽梁以控制桩身之间的差异变形。更多还原

【Abstract】 As a novel type of prefabricated device,U-shaped prestressed concrete sheet pile has been ap-plied for the first time to silting embankment structure on beaches. Its stress state is different from soil re-taining structure. Combined with practical engineering,the LS-DYNA software is employed to conduct a fi-nite element numerical simulation analysis on the dynamic response under wave load,in order to optimizeits design and extend the application. The influence of pile-soil interface and the cap beam on the pile al-so have been researched. The results revealed that the u-shaped prestressed concrete sheet piles demon-strate excellent overall stability and mechanical properties in siltation embankment,and the biggest tensilestress appeared on the surface of the soil. Moreover,the differential deformation of the piles could be wellcontrolled with a cap beam at the top of the pile.更多还原