Non-linear finite element analysis of piled-raft foundations

IF 0.3 Q4 ENGINEERING, GEOLOGICAL Geotechnical Engineering Pub Date : 2004-07-01 DOI:10.1680/GENG.2004.157.3.107
D. Maharaj, S. R. Gandhi
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引用次数: 36

Abstract

This paper presents the results of three-dimensional non-linear finite element analysis of raft and piled raft foundations that have been loaded until failure. The raft, pile and soil have been discretised as eight-noded brick elements. The soil has been modelled as a Drucker–Prager elasto-plastic medium. The analyses have been done for a raft, a piled raft, a group of piles and an individual pile. The load–settlement behaviour of all these foundations is presented. The effect of raft thickness and soil modulus on the load–settlement behaviour of rafts and piled rafts is also presented. The axial load distribution for piles in a piled raft foundation is shown, the development of contact stress with increase in loading intensity is presented for rafts, and curves of contact stress against settlement are shown for rafts and piled rafts. The addition of even a small number of piles has been found to increase the load-carrying capacity of a raft foundation. The axial load distribution shows that the piles in ...
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桩筏基础非线性有限元分析
本文介绍了筏形和桩形筏形基础的三维非线性有限元分析结果。木筏、桩和土被离散为八节点砖单元。土壤被建模为德鲁克-普拉格弹塑性介质。对筏板、桩筏、群桩和单桩进行了分析。给出了这些地基的荷载沉降特性。讨论了筏板厚度和土模量对筏板和桩筏板荷载沉降特性的影响。给出了桩筏基础中桩的轴向荷载分布,给出了筏体接触应力随荷载强度增大的变化规律,给出了筏体和桩筏体接触应力随沉降的变化曲线。研究发现,即使增加少量的桩也能提高筏板基础的承载能力。轴向荷载分布表明:…
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来源期刊
Geotechnical Engineering
Geotechnical Engineering ENGINEERING, GEOLOGICAL-
CiteScore
0.50
自引率
0.00%
发文量
0
期刊介绍: The objectives of the Association shall be the promotion of co-operation among geotechnical societies in SE Asia; and the assistance to member societies who have limited number of members. Now there is only one combined web titled: AGSSEA-SEAGS. SEAGS & AGSSEA encourage the submission of scholarly and practice-oriented articles to its journal. The journal is published quarterly. Both sponsors of the journal, the Southeast Asian Geotechnical Society and the Association of Geotechnical Societies in Southeast Asia, promote the ideals and goals of the International Society of Soil Mechanics and Geotechhnical Engineering in fostering communications, developing insights and enabling the advancement of the geotechnical engineering discipline.
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