Estimation of Alongwind Building Response

by Emil Simiu, (M.ASCE), Struct. Research Engr.; Center for Building Tech., National Bureau of Standards, Washington, D.C.,
Seymour Haber, Mathematician; Mathematical Analysis Div., National Bureau of Standards, Washington, D.C.,
Richard D. Marshall, (M.ASCE), Struct. Research Engr.; Center for Building Tech., National Bureau of Standards, Washington, D.C.,


Serial Information: Journal of the Structural Division, 1977, Vol. 103, Issue 7, Pg. 1325-1338


Document Type: Journal Paper

Abstract: The differences between the values calculated for the dynamic alongwind response, the gust response factors, and the total alongwind response obtained using various current procedures may in certain cases be of the order of 100%. The purpose of this paper is to investigate the causes of such differences. A comparison is made between alongwind deflections of typical buildings selected as case studies, calculated by both new and traditional procedures, some of which are described in various building codes. The reasons for the differences between the respective results are pointed out. The procedures were evaluated on the basis of a recently developed method which utilizes a logarithmic variation of wind speed with height above ground and a height-dependent expression for the spectrum of the longitudinal wind speed fluctuations. The method also allows for realistic cross-correlation between pressures on the windward and leeward building faces.

Subject Headings: Comparative studies | Building codes | Case studies | Wind speed | Dynamic response | Wind gusts | Displacement (mechanics)

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