A Novel Method of Analysis of Single Piles and Pile Groups Subjected to Lateral Loads

承受横向荷载的单桩和群桩分析新方法

• 批准号: 0556347
• 负责人: Rodrigo Salgado
• 金额: $ 31.5万
• 依托单位: Purdue University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-09-15 至 2012-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0556347&HistoricalAwards=false
• 关键词: Novel; Method; Analysis; Single; Piles

PROJECT ABSTRACTIn this project, a completely new method for the analysis and design of laterally-loaded piles will be developed. The new method is now possible because of an analytical breakthrough in the solution of the problem of a pile subjected to lateral load in a layered elastic soil. The solution obtained for a pile loaded at its head by a force and/or a moment is based on the use of the principle of virtual work, the results of the calculus of variations and the method of initial parameters. The method will be applicable to soil deposits with an arbitrary number of soil layers and to single piles or pile groups. Introduction of non-linearity in the stress-strain response of the soil will make the analysis ideal to address realistic engineering problems.This innovative approach to the design of piles supporting structures subjected to wind, seismic, traffic, wave, and earth-pressure loads is based on a closed-form solution for elastic response, and is therefore simpler to use and easier for engineers to relate to (because the soil stress-strain response is introduced at the element level through parameters that are familiar to engineers). It captures aspects of the interaction of the soil and pile that other methods cannot capture, such as the 3D interaction of the pile cross-section with the surrounding soil and the shear stresses that appear in the soil and along the soil-pile interface. The proposed method will also provide the displacement field in the soil around the pile, allowing, by combination with a non-linear stress-strain model, the accounting of soil non-linearity in a rational way. The pile deflection, bending moment and shear force profiles along the pile length (needed for structural design) are directly obtained. Extensive validation is planned by field and laboratory experimental methods (including centrifuge tests and advanced X-Ray Computed Tomography technology) and by numerical methods.To facilitate adoption of this novel method by the industry, a technology transfer program will be developed. An educational program will also be developed, which will include short courses and webinars to be offered to practicing engineers, educators and students (incentives will be available for minority educators and students to attend the short courses). The project will allow establishment of new international collaborative ties with Kumamoto University in Japan and with the Centre for Geomechanics at the University of Nottingham in the U.K.

摘要项目这个项目，将开发一种用于分析和设计侧桩的全新方法。 现在，由于在分层弹性土壤中承受侧向负载的桩问题的解决方案，新方法现在是可能的。 通过力和/或力矩在其头部加载的桩获得的解决方案是基于虚拟工作原理的使用，变化的计算结果和初始参数的方法。 该方法将适用于具有任意数量的土壤层和单堆或桩组的土壤沉积物。 在土壤的压力应对响应中引入非线性的引入将使分析理想地解决现实的工程问题。这种创新的方法是设计受风，地震，交通，交通，波浪和地球压力负载的堆积的堆积的设计，是基于封闭形式的解决方案，因此可以通过弹性响应，因此可以更轻松地进行启动，因为启动了eNterration the Enports the Enport with emparts the e元素（因为土壤均具有质疑（因为土壤）（因为土壤均可使用（因为土壤）（因为土壤都可以进行土壤，因为它是土壤的（因为土壤）（因为它是土壤的质疑）（因为给工程师）。 它捕获了其他方法无法捕获的土壤相互作用和堆的各个方面，例如桩横截面与周围土壤的3D相互作用以及在土壤中以及沿土壤 - 毛皮界面出现的剪切应力。 所提出的方法还将通过与非线性应力应变模型结合使用，以合理的方式来计算土壤非线性的占地。 直接获得了沿桩长度的桩挠度，弯矩和剪切力剖面（结构设计所需的）。广泛的验证是通过现场和实验室实验方法（包括离心测试和高级X射线计算机断层扫描技术）和数值方法计划的。为了促进该行业采用这一新方法，将开发一项技术转移计划。 还将开发一项教育计划，其中包括简短的课程和网络研讨会，将向执业工程师，教育工作者和学生提供（少数族裔教育者和学生可以参加简短课程）。该项目将允许与日本库曼莫托大学建立新的国际合作关系，并与英国诺丁汉大学的地球力学中心建立新的国际合作关系。