Revisiting the p-multipliers used for analysis of large pile groups

重新审视用于分析大型桩群的 p 乘数

• 批准号: 484763-2015
• 负责人: Taiebat, Mahdi
• 金额: $ 1.82万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=584509
• 关键词: Revisiting; multipliers; used; analysis; large

Response of a single pile is significantly different from the response of a pile in a pile group, depending on the particular pile group configuration. In a pile group, the interaction between piles reduces the lateral resistance of the individual piles and this results in less lateral capacity than the sum of the lateral capacities of the individual piles. This proposal is aimed on evaluation of the influence of interaction between piles on the lateral resistance in large pile groups. To this end, advanced continuum simulations of pile groups subjected to static lateral loading will be developed and used to study the response of large pile groups with various spacings and pile head conditions. Contribution of different rows to the lateral resistance and also developed bending moment profiles for different rows will be explored. For each pile group p-multipliers will be calculated and compared with available recommendations to obtain a better understanding about contribution of different rows to the total lateral resistance of the pile group. Given that the available design guidelines for p-multipliers are developed based on analysis of limited number of field tests on small piles groups mostly with free-head condition, the planned numerical analysis in this proposal are expected to play a key role in development of revised p-multiplier design guideline.

单桩的响应与桩群中的桩的响应显着不同，具体取决于 特殊的桩组配置。在群桩中，桩之间的相互作用降低了侧向阻力 单个桩的横向承载力小于单个桩的横向承载力之和 单独的桩。该提案旨在评估桩之间的相互作用对 大型群桩的侧向阻力。为此，对群桩进行了先进的连续模拟 将开发静态侧向荷载并用于研究具有各种特性的大型桩群的响应 间距和桩头条件。不同行对侧向阻力的贡献也得到了发展 将探索不同行的弯矩曲线。对于每个桩组，p 乘数将为 计算并与可用建议进行比较，以更好地了解贡献 不同排数对群桩总侧向阻力的影响。鉴于可用的设计指南 p 乘数是根据对小桩组进行的有限数量的现场测试的分析而开发的，这些小桩组大多带有 自由头条件下，该提案中计划的数值分析预计将在 制定修订后的 p 乘数设计指南。