Wind Load Analysis on Tall Buildings (IS 875 Part 3): Terrain Categories & Vortex Shedding

September 08, 2026 - BY Admin

Wind Load Analysis on Tall Buildings (IS 875 Part 3): Terrain Categories & Vortex Shedding

Designing Slender Skyscrapers to Resist High-Altitude Wind Pressures

For towers rising over 100 meters, lateral wind pressures frequently govern structural member sizing over seismic forces. Fast-moving wind streams create dangerous suction pressures and lateral building sway.

Applying IS 875 (Part 3) Wind Codes

Engineers calculate wind forces by evaluating terrain categories, structure dimensions, and topography effects.

Basic Wind Speed ($V_b$): Regional peak gust velocity mapped to risk coefficients ($k_1$) and terrain factors ($k_2$).
Crosswind Vortex Shedding: Alternating low-pressure vortex eddies that induce lateral building oscillation.
Tuned Mass Dampers: Counteracting upper-floor building sway to maintain human comfort during storms.

Learn lateral wind analysis in our ETABS Structural Design Course.

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Wind Load Analysis on Tall Buildings (IS 875 Part 3): Terrain Categories & Vortex Shedding

Wind Load Analysis on Tall Buildings (IS 875 Part 3): Terrain Categories & Vortex Shedding

Designing Slender Skyscrapers to Resist High-Altitude Wind Pressures

Applying IS 875 (Part 3) Wind Codes

Become a Certified Caddex Professional

WhatsApp Enquiry

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