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

单桩的响应与群桩中的桩的响应显著不同，这取决于 特殊的桩群结构。在群桩中，桩与桩之间的相互作用减小了桩侧阻力 这导致横向承载力小于 个别桩。本建议的目的是评价桩间相互作用的影响， 大型群桩水平抗力。为此，先进的连续模拟群桩受到 静态横向荷载将被开发和用于研究大型群桩的反应， 间距和桩头条件。不同行对侧向阻力的贡献， 将探索不同排的弯矩分布。对于每个桩组，p-乘数为 计算并与现有建议进行比较，以更好地了解贡献 不同排桩对群桩总侧阻力的影响。考虑到现有的设计准则， 在分析有限数量的小桩群桩现场试验的基础上， 自由水头条件下，本提案中计划的数值分析预计将在以下方面发挥关键作用： 制定经修订的p-乘数设计准则。

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.