Reducing the risk of extreme wind induced damage - Girma T. Bitsuamlak, PhD, PEng, F CSCE

Bitsuamlak, PhD, PEng, F CSCE Canada Research Chair in Wind Engineering, and Associate Professor, Western Site Leader for SHARCNET, Director (Research) at Boundary Layer Wind Tunnel Laboratory, and WindEEE Research Institute, Department of Civil and Environmental Engineering, The University of Western Ontario (UWO) September 20, 2019 1 Agenda • Introduction • Recent advances in Computational Wind. [...] • Boundary Layer Wind Tunnel Laboratory • The Insurance Research Lab for Better Homes • The Advanced Facility for Avian Research • WindEEE Dome • WindEEE cluster, SHARCNET and SOSCIP 5 Alan G. [...] 7 WindEEE Dome 8 Recent Advances in Computational Wind Engineering 9 Computational wind engineering: Driving factors • Increased frequency of natural hazards • Multi-scale (component, building, neighborhood), multi-physics (wind, rain, snow, debris) and the wide range of temporal and spatial atmospheric boundary layer flow scales (e.g. [...] turbulence) limits the applicability of experimental approaches • Growth of computational power and algorithm development • The need for accurate and timely wind-induced loss prediction 10 Wind loading chain based on multi-scale and multi-physics CFD simulation Climate models Interaction of the built environment with wind Roughness model Wind induced dynamic excitation 11 Surface roughness from Li. [...] Donrobin model/physics setup 38 Stationary tornado wind field calibration • EF-3 wind speed target (40-s average):53 m/s-62.5 m/s • ? H + ? J%3KLM3JNOK5? J3%PFJ • Average near ground tangential velocity: 38m/s -47.5 m/s • Maximum near ground tangential velocity achieved (? H,V3W) ~38m/s • Near ground core diameter (? Z)~300 m (engulfing the neighborhood) ? Z ? H,V3W Translating tornado over Dunrob.