Evaluation and Development of P-Y Based Procedures for Analysis of 'Short' Drilled Shafts Subjected to Lateral Loads

摘要

The report presents the results of theoretical studies performed to understand and be able to predict better the response of 'short' drilled shafts. A 'short' drilled shaft has been defined as a shaft which undergoes less than two points of zero deflection when subjected to lateral loads. The first portion of the study was directed towards developing simplified procedures for estimating when a drilled shaft would respond as a 'short' shaft, taking into account at least approximately the nonlinear response of the soil. The second portion of the study was directed toward improving the present procedure for predicting the response of 'short' drilled shafts. Several modifications were made to existing procedures based on 'p-y' curves to improve their ability to predict the response of short drilled shafts. These modifications were incorporated into a computer program with other modifications, which are presented in a companion project report.