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 特殊的群桩结构。在群桩中，桩之间的相互作用减小了水平阻力 的水平承载能力，这将导致水平承载能力小于 单桩。该建议旨在评估桩间相互作用对桩基础的影响。 大型群桩的横向阻力。为此，对受荷载作用的群桩进行了先进的连续介质模拟。 将发展静力水平荷载，并用于研究不同类型的大型群桩的反应。 间距和桩头条件。不同排距对侧阻力的贡献也很大 将探索不同排的弯矩分布。对于每个桩组，p乘数将是 计算并与可用的建议进行比较，以更好地了解捐款情况 不同排桩对群桩总水平阻力的影响。鉴于现有的设计指南 P-乘法器是在分析有限数量的小型群桩现场试验的基础上开发的，这些试验大多是 在自由头条件下，计划中的数值分析在这一建议中有望发挥关键作用 修订的p乘法器设计指南的制定。

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.