Dynamic response of the steel roof covering to strong gusts of foehn wind
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Kielce University of Technology
These authors had equal contribution to this work
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ABSTRACT
This study examines the dynamic response of a steel roof covering subjected to strong foehn wind gusts. Since this is not a standard design scenario, a static analysis of wind-loaded structures alone is insufficient. The paper incorporates inertia forces and dynamic equilibrium equations. The equations of motion are calculated an unconditionally stable version of the Newmark method. Numerical simulations were conducted using the author's MES3D program. Wind speed was modelled according to the Kaimal spectrum. Modal and spectral (FFT) analyses were performed for average wind speeds of 30, 35 and 40 m/s to identify frequencies that may induce resonance. The study determines the displacements, accelerations, and axial forces of the steel roof covering.