• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Investigations of nonlinear p-y piles and pile groups in soft clay subjected to static loading-distributed parameter sensitivity analysis.
【24h】

Investigations of nonlinear p-y piles and pile groups in soft clay subjected to static loading-distributed parameter sensitivity analysis.

机译：静态荷载-分布参数敏感性分析对软黏土中非线性p-y桩和桩群的研究。

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

For the design of a pile foundation, the engineer must take into account the axial loads and overturning moments. Although some structures deal with pile under axial load it is very common to see the utilization of piles subjected to lateral loads, especially in areas suitable for earthquakes or offshore platforms, bridges, high-rise structures, piers and so on.;A wide range of lengths and a large group of different boundary conditions were applied on single piles under static loadings, addressed to the pile head. In terms of structure, here the single piles are considered as one dimensional beam and the soil supporting selected is a soft clay and is defined by p-y relationship once under lateral load, deflection of the pile is directly dependent on the soil response and in this case the soil response is a nonlinear function of pile deflection and the depth of the soil below the surface. The p-y model mentioned above for soft clay was developed by Cox, Reese and Grubbs and has been used widely all over the world and is applied in the neighbourhood of the pile.;Under the broad variation of the boundary conditions the group of piles are also analyzed through the sensitivity approach and in this case the cap is considered as a plate and the pile members are recognized as one dimensional beam. The p-y relationship once more is the more appropriate model to understand and represent the behaviour of the pile-soil system. For the case of a group of piles, the utilization of a specific modifier fm factor had to be applied once the group of piles change with respect to spacing of the piles and also the location of the piles inside of the group.;The physical parameters of the soft clay and the stiffness of the pile used for the description of the p-y relationships are taken as the design variables of the continuous type. They are space dependent.;Laterally loaded piles embedded in soft clay bellow the water table under static load is presented in this study under the theoretical formulation and the numerical investigation of sensitivity analysis. In this study both single piles and pile groups are analyzed under the sensitivity approach.;To be able to analyze the sensitivity of the single pile and the group of pile subjected to lateral loads the adjoint method for nonlinear system is used. The first variation of the functional of maximum deformations as a result of the changes of the design variables is formulated based on the virtual work principle.;The variations of maximum generalized deflection located at the pile head as a result of the changes of the design variables are determined by sensitivity integrands and the design variables related. The sensitivity integrands are integrated and the numerical assessment of the outcomes are presented and discussed in details.;Although some specific design variable appeared in the sensitivity analysis of the deformation of the pile soil system each one as expected had demonstrated particular differences and significance through the analysis, and theses will be also part of the final discussion.
机译：在设计桩基时，工程师必须考虑轴向载荷和倾覆力矩。尽管某些结构在轴向载荷下处理桩，但很普遍地看到承受侧向载荷的桩的使用情况，特别是在适用于地震或海上平台，桥梁，高层建筑，码头等的区域。在静载荷下，将一定长度的桩和一大批不同的边界条件施加到单桩上，以桩头为对象。就结构而言，这里的单桩被视为一维梁，所选的土壤支撑物是软粘土，并且在横向载荷下一次受py关系定义，桩的挠度直接取决于土壤的响应，在这种情况下土的响应是桩挠度和地表以下土层深度的非线性函数。上面提到的用于软粘土的py模型是由Cox，Reese和Grubbs开发的，已在世界范围内广泛使用，并应用于桩附近。在边界条件的广泛变化下，桩组也通过灵敏度方法进行分析，在这种情况下，将帽视为板，将桩构件视为一维梁。 p-y关系再次是更合适的模型，用于理解和表示桩-土系统的行为。对于一组桩的情况，一旦一组桩相对于桩的间距以及桩在组内的位置发生变化，就必须使用特定的修正系数fm。用来描述py关系的软粘土的桩号和桩的刚度被当作连续类型的设计变量。它们是受空间影响的。在静力作用下埋入软土波纹管下面的水平荷载桩，在理论分析和敏感性分析的数值研究的基础上，提出了该方案。本研究采用灵敏度法对单桩和桩群进行分析。为了分析单桩和群桩在侧向荷载下的敏感性，采用了非线性系统的伴随法。根据虚拟工作原理，得出了由于设计变量的变化而引起的最大变形函数的第一个变化。；由于设计变量的变化而导致了位于桩头的最大广义挠度的变化。由灵敏度积分和相关的设计变量确定。敏感性积分被整合，并给出了结果的数值评估和讨论。尽管在桩土系统变形敏感性分析中出现了一些特定的设计变量，但每个期望值都通过桩号法表明了特殊的差异和意义。分析，这些内容也将是最终讨论的一部分。

著录项

  • 作者

    Mora, Marcia Regina.;

  • 作者单位

    University of Windsor (Canada).;

  • 授予单位 University of Windsor (Canada).;
  • 学科 Engineering Civil.
  • 学位 M.A.Sc.
  • 年度 2007
  • 页码 315 p.
  • 总页数 315
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号