Wind-Induced Responses in Tall Steel Buildings Using International Standards

Tall buildings are being developed due to rapid urbanization, as land availability decreases and population growth increases. High-rise buildings are more susceptible to wind forces, making their structures dynamically sensitive at greater elevations. The gust factor, a pseudo-static constant, is provided by several nations to compute dynamic wind forces. This study compares the structural response of tall steel buildings with V-bracing, X-bracing, and Chevron bracing under dynamic wind loading, using four different codes and standards: India (IS 875:2015 part-3), America (ASCE 7-16), Australia/New Zealand (AZ/NZS 1170.2:2011), and Canada (NBCC 2015) for varying structure heights and exposure conditions (Open and Rough). The finite element software ETABSv.18 is utilized for analysis. All the structures produce acceptable outcomes in both the Open and Rough Exposure categories. Finally, conclusions are drawn from comparing evaluated dynamic lateral forces, showing that Chevron bracing produces the most satisfying results. The story drifts, maximum story displacement, base shear, and overturning moments are used to evaluate the results.