Response of Pile Groups in Silt Subjected to Eccentric Lateral Loading
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 141, Issue 7
Abstract
This paper reports two pile group tests in saturated silt laterally loaded at eccentric distances of and . The model piles were 0.114 m in diameter and 5.95 m in length. The objectives of the tests are to investigate (1) the response of the pile group subjected to eccentric lateral loading and the influence of load eccentricity; and (2) the internal forces mobilized in the piles and their contributions to resisting the applied lateral loads and torques. The results of the model tests indicate that the lateral resistance of the pile group decreased significantly with eccentricity. The lateral resistance of the pile group with an eccentric distance of was 1.5 times that with an eccentric distance of at a horizontal displacement of 50 mm at the center of the pile cap. The mobilized pile-head shear forces as well as the bending moments and horizontal displacements in the piles differ significantly in both magnitude and direction. The shear resistances of the piles contributed to resisting both the applied lateral loads and torques. Different twist centers were found in the pile group for different load eccentric distances. The distances of the twist center to the pile cap center were 9 and in the tests with eccentric distances of 6 and , respectively.
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Acknowledgments
The authors acknowledge the financial support from the National Natural Science Foundation of China (Grant Nos. 50809060, 51225804, 41472244, and U1234204), and financial support by Zhejiang Electrical Power Design Institute (Contract number: KXK2014-012).
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 141 • Issue 7 • July 2015
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Dec 19, 2012
Accepted: Jan 30, 2015
Published online: Mar 2, 2015
Published in print: Jul 1, 2015
Discussion open until: Aug 2, 2015
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