Aerodynamic Model Tests of Tall Buildings
Publication: Journal of Engineering Mechanics
Volume 115, Issue 3
Abstract
The theory of the dynamic‐balance wind‐tunnel test is reviewed to identify sources of error that arise when the mode shapes of a structure are nonideal. A systematic process of applying corrections is developed, which results in two adjustment factors—one applicable to displacements and accelerations, and a second applicable to equivalent static loads. The factors are separated into unknown random effects arising from the external wind load distribution and a deterministic effect arising from the structure's mode shape and mass distribution. A simplified assumption on the former is made to evaluate the sensitivity of the correction factors to mode shape and external distribution and to compare them with previous results in the literature. Certain of those results are seen to be misleading in implying that torsional loads should be reduced by a significant, but inappropriate, factor. A simple means of distributing static‐equivalent loads over the height of the structure, while accounting for resonant and background response contributions, is also given.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Davenport, A. G. (1967). “Gust loading factors.” J. Struct. Div., ASCE, 93(ST3), 11–34.
2.
Kareem, Ahsan (1982). “Fluctuating wind loads on buildings.” J. Engrg. Mech., ASCE, 108(EM6), 1086–1102.
3.
Reinhold, Timothy A. (1983). “Distribution and correlation of dynamic wind loads.” J. Engrg. Mech., ASCE, 109(6), 1419–1436.
4.
Reinhold, Timothy A., and Kareem, Ahsan (1986). “Wind loads and building response predictions using force balance techniques.” Dynamic Response of Structures, Gary C. Hart and Richard B. Nelson, eds., ASCE, 390–397.
5.
Tallin, A., and Ellingwood, B. (1985). “Analysis of torsional moments on tall buildings.” J. Wind Engrg. and Ind. Aerodynamics, 18, 191–195.
6.
Tschanz, T. (1982). “Measurement of total dynamic loads using elastic models with high natural frequencies.” Wind Tunnel Modeling for Civil Engineering Applications, T. A. Reinhold, ed., National Bureau of Standards, Washington, D.C., 296–312.
7.
Tschanz, T., and Davenport, A. G. (1983). “The base balance technique for the determination of dynamic wind loads.” J. Wind Engrg. and Ind. Aerodynamics, 13, 429–439.
8.
Vickery, B. J. (1970). “On the reliability of gust loading factors.” Proc. of a Technical Meeting Concerning Wind Loads on Buildings and Structures, Building Science Series 30, National Bureau of Standards, Washington, D.C., 93–104.
9.
Vickery, P. J., et al. (1985). “The effect of mode shape on the wind‐induced response of tall buildings.” Proc. of the Fifth U.S. National Conference on Wind Engineering, Texas Tech. University, 1B‐41‐1B‐48.
Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 115 • Issue 3 • March 1989
Pages: 618 - 635
Copyright
Copyright © 1989 ASCE.
History
Published online: Mar 1, 1989
Published in print: Mar 1989
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.