軟弱地盤における建築構造物の即時沈下および圧密沈下の三次元有限要素法解析

抄録

The purpose of this paper is to investigate the differential settlements of frame structures on cohesive soils which are layered from ground surface to considerably deep stratum. In this paper, a three-dimensional finite element method has been presented to analyze the structure-foundation-soils interaction. The following idealizations have been made in the method I 1) The three-dimensional element which has been derived from the effective stress principle so as to represent the shear settlements and the consolidation settlements is used for the soils. 2) The linear elastic beam element is used for the superstructures and the foundations. 3) The elasto-plastic linkage element which has been expressed as a function of effective overburden pressure and slip along the pile shaft is used for the joints between piles and soils. And further, the preliminary analysis for the non-conforming condition between the element of foundations and that of soils as well as the analysis for the size of finite element mesh have been executed. As a result, we conclude that the present method is suitable to analyze the settlement process of both frame structures with spread foundations and those with friction pile foundations on poor grounds.