Response of Structures to Random Wind Forces

by Michael J. O'Rourke, (A.M.ASCE), Asst. Prof.; Rensselaer Polytechnic Inst., Troy, N.Y.,
Ross B. Corotis, (A.M.ASCE), Asst. Prof.; Northwestern Univ., Evanston, Ill.,
Richard A. Parmelee, (M.ASCE), Prof. of Civ. Engrg.; Northwestern Univ., Evanston, Ill.,

Serial Information: Journal of the Structural Division, 1975, Vol. 101, Issue 12, Pg. 2557-2571

Document Type: Journal Paper


The effect of wind forces are of primary importance in the design of tall buildings. Since wind forces are random variables, it is necessary to approach the problem from a statistical viewpoint. This paper presents a method for making an analysis of the response of a building subjected to a wind loading. The forcing function is assumed to be an independent stationary stochastic process, and the output of the analysis are the standard deviations of the floor displacements. Also presented is a study of the effect of neglecting inertia and damping terms associated with flexural motions of the floor analysis. Finally, an approximate method for determining the standard deviations of the rigid body floor displacements is presented which yields results that are within 10% of the exact values.

Subject Headings: Floors | Structural response | Wind forces | Building design | Wind loads | Stationary processes | Displacement (mechanics) | Statistics

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