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Equivalent Plastic Hinge Length of Extended Pile-Shafts embedded in Sand

 Equivalent Plastic Hinge Length of Extended Pile-Shafts embedded in Sand
Author(s): , ,
Presented at IABSE Conference: Bridges and Structures Sustainability - Seeking Intelligent Solutions, Guangzhou, China, 8-11 May 2016, published in , pp. 144-151
DOI: 10.2749/222137816819258438
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Under strong seismic excitation, the extended pile-shaft will inevitably form a plastic hinge in its underground portion. The underground damage is difficult for post-earthquake restoration and may...
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Bibliographic Details

Author(s):


Medium: conference paper
Language(s): English
Conference: IABSE Conference: Bridges and Structures Sustainability - Seeking Intelligent Solutions, Guangzhou, China, 8-11 May 2016
Published in:
Page(s): 144-151 Total no. of pages: 8
Page(s): 144-151
Total no. of pages: 8
Year: 2016
DOI: 10.2749/222137816819258438
Abstract:

Under strong seismic excitation, the extended pile-shaft will inevitably form a plastic hinge in its underground portion. The underground damage is difficult for post-earthquake restoration and may cause large residual displacement at the top of the pile-shaft. In this regard, the ductile behavior, especially the characterization of the underground plastic hinge needs to be investigated. In this paper, a Beam on Nonlinear Winkler Foundation (BNWF)-based finite element (FE) model embedded in a homogeneous sand layer was developed in the Open Sees platform and calibrated by an in-situ full-scale test. This study focused on the effect of different structural and soil parameters on the equivalent plastic hinge lengths(EPHLs) of extended pile-shafts. Results indicate that the EPHLs of piles are affected by many parameters of pile-soil systems. A typical range of EPHLs of the pile is also obtained from the parametric study.

Keywords:
seismic performance Extended Pile-Shafts BNWF Equivalent Plastic Hinge Length