Comparisons of Aerodynamic Data with the Main Wind Force–Resisting System Provisions of ASCE 7-16. I: Low-Rise Buildings
Publication: Journal of Structural Engineering
Volume 147, Issue 3
Abstract
This study assesses the wind load provisions for low-rise buildings with Chapters 27 and 28 in ASCE 7-16 and analyzes the dependence of the aerodynamics on the building geometric parameters. A systematic analysis of an aerodynamic database was used for this purpose. The mean and gust-factored uplift, base shear, and area-averaged wall pressure coefficients acting on the building surfaces comprise the main focus of this work. The results indicate that Chapter 27 captures the increasing tendency of roof uplift coefficients with larger roof heights reasonably well. The base shear obtained from the database is observed to vary with roof height, but conflicts with the design wind loads of ASCE 7-16. The ratio of roof height, , to the horizontal plan dimension parallel to wind direction, , is the critical nondimensional geometric parameter to model the uplift, leeward wall, and side wall pressure trends for low-rise buildings. It is also observed that the uplift can be used as a predictor of the side wall pressure coefficients for low-rise buildings. The Chapter 28 provisions conservatively envelop the data for relatively low buildings, but underestimate the wind loads for .
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The authors gratefully acknowledge the partial financial support of the Natural Sciences and Engineering Research Council (NSERC) of Canada through the Discovery Grants program. The authors are grateful to an advisory group made up of members of the ASCE 7-22 Wind Loads Sub-Committee, chaired by Don Scott. GAK gratefully acknowledges the support of ImpactWX and the University of Western Ontario.
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Published In
Journal of Structural Engineering
Volume 147 • Issue 3 • March 2021
Copyright
© 2020 American Society of Civil Engineers.
History
Received: May 12, 2020
Accepted: Sep 22, 2020
Published online: Dec 21, 2020
Published in print: Mar 1, 2021
Discussion open until: May 21, 2021
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