Influence of wind tunnel test duration on wind load factors

Published

August 17, 2018

Author(s)

Dat Duthinh, Adam L. Pintar, Emil Simiu

Abstract

A methodology is presented for calculating the uncertainty associated with the estimation of peak pressure coefficients from wind tunnel test records of various lengths, and how this uncertainty affects design wind effects. Investigation of time series belonging to five categories of pressure coefficients implicit in the ASCE 7-10 Standard shows that uncertainties in the peak pressure coefficients with coefficients of variation as high as 20 % typically increase the design wind effects by 6 % or less. For typical civil engineering wind tunnels, this result implies that such small increases are also inherent in test durations as low as 10 s, corresponding to prototype durations of less than 6 min. These results provide useful indications on minimum lengths of pressure records to be measured in wind tunnels.

Citation

Journal of Structural Engineering-ASCE

Pub Type

Journals

Keywords

coefficient of variation, extreme value distribution, load factor, peak-over-threshold, pressure coefficient, sampling error, statistical independence, uncertainty, test duration, wind tunnel test. coefficient of variation, extreme value distribution, load factor, peak-over-threshold, pressure coefficient, sampling error, statistical independence, uncertainty, test duration, wind tunnel test. coefficient of variation, extreme value distribution, load factor, peak-over-threshold, pressure coefficient, sampling error, statistical independence, uncertainty, test duration, wind tunnel test.

Citation

Duthinh, D. , Pintar, A. and Simiu, E. (2018), Influence of wind tunnel test duration on wind load factors, Journal of Structural Engineering-ASCE (Accessed December 12, 2024)