Investigation on Non-Gaussian Peak Factors for Wind Pressures on Domed Roof Structures

Yuan-Lung Lo

doi:10.6180/jase.2016.19.2.03

Investigation on Non-Gaussian Peak Factors for Wind Pressures on Domed Roof Structures

Civil Engineering

Yuan-Lung Lo This email address is being protected from spambots. You need JavaScript enabled to view it.¹

¹Department of Civil Engineering, Tamkang University, Tamsui, Taiwan 251, R.O.C.

Received: July 1, 2015
Accepted: November 6, 2015
Publication Date: June 1, 2016

Download Citation: ||https://doi.org/10.6180/jase.2016.19.2.03

ABSTRACT

Roof curvature and Reynolds number effect significantly define the characteristics of wind pressures on domed roof structures. Once the flow separates from the roof surface, apparent changes in aerodynamic coefficients or non-Gaussian wind-induced pressure spectra are expected. This paper investigated the non-Gaussian peak factors of wind pressure coefficients on domed roofs under a simulated suburban boundary layer flow. By estimating the higher statistic moments, skewness and kurtosis coefficients, and adopting the moment-based Hermite polynomial translation techniques, including the softening and hardening processes, comparisons were made based on the empirical and simulated results. The fairly good estimation results by translation process were demonstrated and the influence on the estimation of wind pressure extremes was discussed in a practical viewpoint.

Keywords: Non-Gaussian, Hermite, Extremes

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