Pile groups under vertical and inclined eccentric loads: Elastoplastic modelling for performance based design
نویسندگان
چکیده
This paper presents a numerical study of 3×3 pile groups embedded in clay under vertical and inclined eccentric loads. Simplified modelling, based on elastic beams soil continuum, is used to explore the soil-pile-cap response. simple model allows rigorous treatment 3D foundation geometry local plasticity, demonstrated through validation with finite element analysis. The results reveal that complex roto-translational displacements group are induced by or loads, highly nonlinear relationships when plasticity considered. Interestingly, loads mobilise lateral resistance at large cap displacements. Thus, while existing t-z type models shown be adequate for serviceability predictions, they could provide overly-conservative estimates ultimate load capacity. Also, internal forces can exceed allowable bending moments reinforced concrete piles multi-directional For performance design actions, engineers should estimate impact yielding both rotations cap, satisfy limit state requirements. Dimensionless charts presented, which describe reduction capacity, prescribed displacement, as function eccentricity inclination.
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ژورنال
عنوان ژورنال: Computers and Geotechnics
سال: 2021
ISSN: ['1873-7633', '0266-352X']
DOI: https://doi.org/10.1016/j.compgeo.2021.104092