Revisiting Basic Wind Speed of Metro Cities of India
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Volume 22, Issue 4
Abstract
An accurate prediction of design wind speed is critical to the estimation of wind loads on any earth-bound civil engineering structure. Concerns have been raised within the Indian design community concerning the precision of design wind speeds as well as the new formulation of the importance factor for cyclonic regions in the current Indian Wind Loading Standard. The current study investigates the extreme wind climate of India by carrying out an independent study of wind speeds at noncyclonic and cyclonic regions, respectively, using measured and simulated data. Further, the results were compared against the existing wealth of knowledge concerning other major international standard formulations, gust factors, and wind speeds of similar climate regions. This study demonstrates that the existing 50-year return period wind speeds in the IS for noncyclonic regions such as Mumbai and Delhi are overconservative resulting in uneconomical structures. Further, the study confirms that the existing 50-year return period wind speeds for cyclonic regions such as Chennai and Kolkata are conservative as well without the use of cyclonic factor (). The study recommends the removal of the cyclonic factor () section from the standard and also recommends a basic wind speed of 39 and respectively for Mumbai and New Delhi.
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Data Availability Statement
Some or all data, models, or code generated or used during the study are proprietary or confidential in nature and may only be provided with restrictions. The data and model corresponding to cyclonic simulation are confidential in nature.
Acknowledgments
The authors hereby kindly acknowledge the valuable contributions of our previous colleague Valerie Sifton towards this paper.
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Published In
Natural Hazards Review
Volume 22 • Issue 4 • November 2021
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© 2021 American Society of Civil Engineers.
History
Received: Jul 17, 2020
Accepted: Mar 16, 2021
Published online: Jun 30, 2021
Published in print: Nov 1, 2021
Discussion open until: Nov 30, 2021
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