EFFECT OF STIFFNESS OF STAIRCASE, CORE AND BRICK WALLS IN RC FRAMED STRUCTURE SUBJECTED TO WIND LOAD

Due to excessive displacements of tall buildings occasioned by lateral loads, lateral load resisting systems are usually provided to curtail the load effect.The resistance may be offered by Frame Action, Core Walls, or combined Walls and Frames (also known as Dual System). In this study, 3D structural modeling based software STAAD .Pro V8i was used to generate and analyze three-dimensional building models for the assessment of the relative effectiveness of the lateral load resisting systems under the effect of wind. Ten types of RC frames with and without Staircase and Core wall have been considered; a bare frame, a frame with external brick wall 230mm & internal brick wall 115mm thick, a frame with only external brick wall of 230mm thick, a frame with only external brick wall of 150mm thick and a frame with only external brick wall of 115mm thick.Number of storey has been G+30. Each building model was analyzed for the determination of the lateral displacements at storey top. From the pilot study, it is concluded the consideration of stiffness of different elements (i.e., staircase, core and brick walls) in the frame analysis shows significant variation in the lateral displacement.