波浪荷载下U型混凝土板桩促淤坝动力响应数值分析

发布时间：2018-03-14 05:34

  本文选题：U型预应力混凝土板桩　切入点：促淤坝　出处：《水利学报》2015年S1期 　论文类型：期刊论文

【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。
[Abstract]:As a new type of prefabricated member, U-type prestressed concrete slab pile is first applied to the siltation promoting dam structure of tidal flat, and its stress state is different from that of retaining soil structure. In this paper, the three-dimensional numerical simulation analysis is carried out by using LS-DYNA software in combination with the actual engineering. The dynamic response under wave load is analyzed, and the influence of the treatment methods such as setting pile-soil contact surface and cap beam on the top of plate pile is discussed. The results show that the U type prestressed concrete slab pile has good overall stability and mechanical properties when it is applied to the silting promoting dam, and the maximum tensile stress of the pile body appears near the mud surface. A cap beam can be set on the top of the pile to control the differential deformation of the pile body.
【作者单位】： 上海勘测设计研究院;上海交通大学土木工程系;
【基金】：上海市科委科研计划项目(11231202300) 上海市浦江人才计划(13PJD017)
【分类号】：U656.3
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本文编号：1609820