Analytical Approach for Seismic Performance of Extended Pile-Shafts
Publication: Journal of Bridge Engineering
Volume 23, Issue 10
Abstract
Seismic performance of bridge structures supported by extended pile-shafts principally depends on the curvature demand in critical regions of the pile below ground level. The equivalent fixed-based cantilever model is commonly used to assess the local curvature ductility demand of a yielding pile-shaft at any inelastic displacement level. In this approach, adequate prior knowledge of several parameters, including depth-of-fixity, plastic-hinge depth, and equivalent plastic-hinge length, is essential for proper estimation of ductility capacity. The present study aims to propose analytical formulations by using concepts of the strain wedge method based on nonlinear behavior of the soil-pile system to assess the key parameters of the equivalent cantilever model. The ability of the developed model in assessing the curvature ductility demand of the bridge system is validated against several published full-scale tests on RC shafts in clay and sand.
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Published In
Journal of Bridge Engineering
Volume 23 • Issue 10 • October 2018
Copyright
© 2018 American Society of Civil Engineers.
History
Received: Jul 3, 2017
Accepted: Mar 15, 2018
Published online: Jul 18, 2018
Published in print: Oct 1, 2018
Discussion open until: Dec 18, 2018
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