Wind Pressure Coefficients on Pyramidal Roof of Square Plan Low Rise Double Storey Building

Document Type : Original Article


1 Ph.D. Scholar, Civil Engineering Department, National Institute of Technology, Hamirpur, Himachal Pradesh, India

2 Assistant Professor, Department of Civil Engineering, National Institute of Technology Hamirpur, Himachal Pradesh-177005, India


The present study demonstrates the pressure variation due to wind load on a two storey building with a square plan and a pyramidal roof through CFD simulation. Past cyclone reports and other related post-disaster studies have shown loss of lives and extensive property loss mostly in the cyclone prone regions of India. Post-disaster studies reveal that a pyramidal roof has much better chances of survival in comparison with other roof shapes. ANSYS Fluent has been used for the simulation and ANSYS CFD-Post has been used for observing the wind pressure on building roofs. The simulations are performed using the realizable k-ε turbulent model by considering grid sensitive analysis and validation with previously published wind tunnel experminetal measurements. The present study includes wind behaviour around the building model with different roof slopes. Comparisons of pressure coefficients are shown for five wind incidence angles to study the effect of wind on the building. Results indicate that both maximum positive and maximum negative wind pressure coeffiecients increase with increasing roof slopes. The results of the study is helpful in understanding the damage caused on the roof surface during the extreme wind condition.


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