Fragility of offshore wind turbines variation with pulse-period and amplitude: Directivity and Fling step

Chaudhari, V. and Somala, S N (2022) Fragility of offshore wind turbines variation with pulse-period and amplitude: Directivity and Fling step. Structures, 41. pp. 66-76. ISSN 2352-0124

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Abstract

This work evaluates the offshore wind turbine structure (OWT) subjected to the forward directivity and fling step types of pulse ground motion. The influence of the pulse period and amplitude of the forward directivity and fling step pulses are ascertained for the ground motion generated from closed-form analysis. The probabilistic seismic demand model (PSDM) approach is used to compute the offshore wind turbine response. The OpenSees tool is used to perform nonlinear time history analysis. Finally, fragility curves are derived for serviceability limits state of wind turbines. The influence of forward directivity and fling step pulse is evaluated and compared for the tower top and pile top rotation. Results shows that the OWT is more sensitive to the directivity pulses than fling step pulse for increased pulse period, while inversed trend observed for the pulse amplitude. © 2022

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IITH Creators:	IITH Creators ORCiD Somala, S N https://orcid.org/0000-0003-2663-3351
Item Type:	Article
Additional Information:	Funding from the Ministry of Earth Sciences, India through grant number MoES/P.O(Seismo)/1(304)/2016 is greatly acknowledged
Uncontrolled Keywords:	Forward Directivity and Fling step Pulses, Fragility Analysis, Offshore wind turbine, PSDM curve
Subjects:	Civil Engineering
Divisions:	Department of Civil Engineering
Depositing User:	. LibTrainee 2021
Date Deposited:	22 Jun 2022 05:38
Last Modified:	22 Jun 2022 09:14
URI:	http://raiithold.iith.ac.in/id/eprint/9339
Publisher URL:	https://doi.org/10.1016/j.istruc.2022.04.078
OA policy:	https://v2.sherpa.ac.uk/id/publication/33171
Related URLs:	Author

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