NUMERICAL SIMULATION OF WIND LOAD EFFECTS ON LOW RISE BUILDINGS

Abstract

Wind load plays a governing role in the designing of the roof in the coastal and hilly regions. The shape and angle of roof slope are key parameters while designing the structure for such loads. The present study demonstrates the variation of pressure due to wind loads on the pitched roof of a low rising building with different roof angles. The main parameters determining the pressure distribution over the building due to wind loads are length, height, span and roof angle. Most research work have already been performed for the wind load calculations for different type of roofs in respect to different standards and conditions only for standard building shapes. However, this study solely focuses on pitched type roof with complete opening. The interference effect on low-rise structures is not given proper attention despite different The study constitutes of interference effect of different structures due to corresponding building’s location in a controlled system performed in ANSYS CFD simulations. Many studies on roofed structures have been performed in the past. However, interference effect with respect to different roof angles for different rotational arrangements of the structure were not observed in these studies. A k–ε model is used for the pressure distribution on the roof of the building model. The simulation was performed in ANSYS CFD with different roof slopes (α) i.e, 10°,20°,30° and for different angles of rotations(Ө) i.e, 0°,30°,45°,60°,90° and for different spacing between the adjacent structures being different ratios of width of the building (B) i.e, 0B, B/2, 3B/2, 2B. Pressure Coefficient (Cp) have been calculated and different contour profiles are represented as results on the roof surfaces.