Equivalent Damping Ratio Equations in Support of Displacement-Based Seismic Design for Pile-Supported Wharves

This study primarily proposes new equivalent damping ratio equations based on Jacobsen's approach for displacement-based seismic design of pile-supported wharves to account for wharf configurations and soil-pile interaction. It is found that Pivot hysteresis model and Masing rule can accurately...

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Bibliographic Details
Published in:Journal of earthquake engineering : JEE 2017-04, Vol.21 (3), p.493-530
Main Authors: Gao, Shufei, Gong, Jinxin, Feng, Yunfen
Format: Article
Language:English
Subjects:
Damping
Displacement Demand
Displacement-Based Seismic Design
Equivalent Damping
Pile-Supported Wharves
Pivot Hysteresis Model
Ports
Seismic engineering
Soil-Pile Interaction
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Summary:This study primarily proposes new equivalent damping ratio equations based on Jacobsen's approach for displacement-based seismic design of pile-supported wharves to account for wharf configurations and soil-pile interaction. It is found that Pivot hysteresis model and Masing rule can accurately capture nonlinear behavior of concrete and steel wharves, respectively. To verify applicability of proposed equations, analyses were conducted to three typical wharves to make a comparison of maximum displacements obtained from nonlinear time-history analyses and substitute structure method with various damping equations. The verification reveals proposed equations are better than those in practice for their higher precision in determining displacements.
ISSN:1363-2469
1559-808X
DOI:10.1080/13632469.2016.1172377