Large-Scale Modeling and Theoretical Investigation of Lateral Collisions on Elevated Piles
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 138, Issue 4
Abstract
Large deflection is mobilized in elevated piles of nonnavigable piers and some flexible protective systems subjected to lateral ship collisions. Because the current bridge design specifications are only suitable for the design of rigid foundations, new analysis and design methods are required for these flexible elevated piles. A large-scale lateral static load test and an additional three impact tests on piles in low liquid limit silt (ML) soil were carried out in a large soil tank. Both static and dynamic soil pressures on the pile shaft were measured, and then the soil-pile interaction was studied in detail. Based on the results, static hyperbolic curves of the piles were derived for dynamic curve models. Through investigations of three linear and nonlinear soil-pile dynamic interaction models, the dynamic curve models with nonlinear static stiffness coefficients and constant damping coefficients are recommended for the analysis of piles subjected to lateral impact loading. Verified by three impact tests with different impact energies, a dynamic collision analysis model involving the dynamic curve model is presented for the analysis of collisions between ships and elevated piles.
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Acknowledgments
This study was supported by the National Natural Science Foundation of China (research grant: 50979097, 50809060, and 50878193), the Program for New Century Excellent Talents in University (NCET), and the Fundamental Research Funds for the Central Universities (2010XZZX001, 2010KYJD006). All technicians, especially Mr. S. Y. Wang in the Laboratory of Soft Soil and Geo-environmental Engineering of Zhejiang University, are also acknowledged.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 138 • Issue 4 • April 2012
Pages: 461 - 471
Copyright
© 2012. American Society of Civil Engineers.
History
Received: Jul 26, 2010
Accepted: Aug 23, 2011
Published online: Aug 25, 2011
Published in print: Apr 1, 2012
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