Effect of loading eccentricity on the ultimate lateral resistance of twin-piles in clay

Zhao, Zihao and Zhang, Hao and Ke, Lijun and Zhao, Guoqing and Meng, Suyun and Wu, Fengyuan and Shiau, Jim ORCID: https://orcid.org/0000-0002-9220-3184 (2022) Effect of loading eccentricity on the ultimate lateral resistance of twin-piles in clay. Soils and Foundations, 62 (2):101126. pp. 1-14. ISSN 0038-0806

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Abstract

This paper studies the effect of loading eccentricity and pile spacing on the ultimate lateral soil resistance of twin-piles using finite element limit analysis and analytical upper bound plasticity methods. Two kinematic mechanisms corresponding to the failure modes produced by the advanced finite element simulations are postulated with different eccentricity and pile spacing cases. Comparisons have shown excellent agreements between the two approaches. A series of parametric studies are then subsequently performed. Numerical results have shown that loading eccentricity considerably affects ultimate lateral soil resistance, leading to a maximum reduction of 50%. In addition, the curve of normalised pile resistance versus pile spacing ratio is dissimilar to that without considering the effect of loading eccentricity. The proposed solutions and failure mechanisms in this study will provide a deepened insight on the performance of twin-pile group under eccentric loads.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: Current – Faculty of Health, Engineering and Sciences - School of Engineering (1 Jan 2022 -)
Faculty/School / Institute/Centre: Current – Faculty of Health, Engineering and Sciences - School of Engineering (1 Jan 2022 -)
Date Deposited: 06 Apr 2022 01:40
Last Modified: 19 May 2022 02:27
Uncontrolled Keywords: piles; twin-pile group; lateral soil resistance; clays; numerical limit analyses; analytical upper bound plasticity calculations; loading eccentricity
Fields of Research (2020): 40 ENGINEERING > 4005 Civil engineering > 400502 Civil geotechnical engineering
Identification Number or DOI: https://doi.org/10.1016/j.sandf.2022.101126
URI: http://eprints.usq.edu.au/id/eprint/47516

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