Three-dimensional Finite Element Analyses of Barrette Piles under Compression and Uplift Loads with Field Data Assessments

Abstract

This paper presents the three-dimensional finite element modeling of barrette piles in clayey and sandy soils, in which the piles are subjected to statically compressive and uplift loads. Load displacement curves and load transfers were monitored and compared to solutions from one-dimensional finite difference analysis. Capacities of the barrette piles were examined by interpretation methods and bearing capacity equations. Pile load test data of barrette piles located in Xingyi District, Taipei Basin was used for simulation. It was found that the conventional bearing capacity equations are applicable to barrette piles. The interface elements between pile and soils were found to significantly affect the results. Finite element analysis can provide more complete solutions when compared with finite difference analysis. It was also found that the soil frictions due to pile uplift in soft clays at Taipei Basin were underestimated when using common strength reduction ratios.