Estimation of Extreme Wind Load on Structures and Claddings
Publication: Journal of Engineering Mechanics
Volume 143, Issue 9
Abstract
A modified Cook-Mayne method is proposed for extreme wind load estimation. A technique that can simulate true -order extreme values of a correlated random process is adopted in this method to estimate the annual multiorder maximum 10-min mean wind speeds. These estimated extreme wind speeds are then used for extreme wind load estimation on structures. Results show that the autocorrelation of the macrometeorological fluctuating wind can have significant effects on the estimated extreme wind load. A big difference is found when comparing the design fractile of the extreme wind load coefficients obtained from the modified method by considering the autocorrelation of wind speeds and the existing full-order method in which only independent wind speeds are adopted. The order of annual maximum wind speeds required for wind load estimation is also examined. The number of orders that is needed for 50-year return period wind load design varies greatly—from 2 to 50—and depends on the application conditions. The design fractile of extreme wind load coefficient distribution for a 50-year return period can be increased to 93% from the 79% recommended in the existing method.
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Acknowledgments
This study is supported by the National Natural Science Foundation of China (51408207) and the Key laboratory for wind and bridge engineering of Hunan province (15K028). The support is also given by the 111 Project on Grant B13002. The authors give special thanks to Prof. Xinzhong Chen, and Prof. S. S. Law for their great help.
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Information & Authors
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Published In
Journal of Engineering Mechanics
Volume 143 • Issue 9 • September 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: Sep 13, 2015
Accepted: Mar 10, 2017
Published online: Jun 7, 2017
Published in print: Sep 1, 2017
Discussion open until: Nov 7, 2017
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