Structures Congress 2019
Experimental Study on Seismic Behavior of Scoured Pile-Group Foundations Considering Pile Uplift
Publication: Structures Congress 2019: Bridges, Nonbuilding and Special Structures, and Nonstructural Components
ABSTRACT
Scoured pile-group foundations, as one of the most vulnerable parts of bridges, can suffer inelastic deformations under earthquakes. Other than capacity-protection strategy, one alternative solution is to treat the scoured pile-group foundations as potential energy-dissipation components with limited ductility. To this end, the seismic behavior of scoured pile foundations should be evaluated carefully. In this study, to reveal the impact of pile uplift on the seismic behavior of scoured pile-group-foundations, quasi-static cyclic loading tests were conducted on two 2×2 RC square-pile foundation specimens with and without significant pile-uplift potentials. The hysteretic behavior, cap rotations, and pile damages were recorded. Dissipated seismic energy were also discussed. Test results reveal that the specimen with significant pile-uplift, compared with its counterpart, has flag-shaped hysteretic loops, indicating a pile-uplift failure mode. The seismic energy was mainly dissipated by the pile-soil interface friction, suggesting the effect of pile-uplift should be considered carefully.
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Acknowledgement
The financial support provided by the National Natural Science Foundation of China under Grant No. 51778469 is gratefully acknowledged.
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Published In
Structures Congress 2019: Bridges, Nonbuilding and Special Structures, and Nonstructural Components
Pages: 221 - 230
Editor: James Gregory Soules, McDermott International
ISBN (Online): 978-0-7844-8223-0
Copyright
© 2019 American Society of Civil Engineers.
History
Published online: Apr 22, 2019
Published in print: Apr 22, 2019
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