水平力を受ける群杭基礎に関する3次元有限要素解析

Abstract

In this study, an analysis of the behavior of piles subjected to lateral loads is carried out by a three-dimensional elasto-plastic finite element method (GPILE- 3 D).The installed piles are treated as high rigidity columns in this analysis.Furthermore, since the three-dimensional model requires much CPU time and memory, the conjugate gradient method is introduced to solve the equations.In order to check the validity of this analysis, field measurement data of laterally loaded tests on prototype single piles is used.The single piles are installed in a laminated ground by a cast-in-place reinforced concrete pile, 25 m in length and 1.2 m in diameter.The following two kinds of prototype tests are analyzed: 1) free-headed single pile and 2) fixed-headed single pile.As a result, the proposed numerical method has been found to be capable of estimating the behavior of laterally loaded piles.