EVALUATION OF THE EFFECT OF MASONRY INFILL ON LOW, MEDIUM AND HIGH-RISE BUILDINGS

Abstract:

When a structure is subjected to Lateral Loads (wind, earthquake etc.), its response     depends on the effect the Masonry Infill (MI) has on the RC frame. A number of researches in this regard have been made to model the MI and analyse the structure under lateral loads. The analytical analysis included the MI walls which were modelled as Equivalent strut the width of which was calculated based on the equations proposed by various researchers. When laterally loaded the Infill (IF) behaved like a compression strut carrying axial forces in them. This completely changed the frame action of the structure to truss action, reducing the Bending moments and the Shear forces on the columns and beams. In the present study, an attempt was made to study the effect of Masonry Infill on Low, Medium and High-rise frames. Static pushover analysis is being performed on a 4-storey, 8-storey and a 12-storey frames, and the results are compared in terms of Time periods, Base shear, Roof displacement, Storey drifts, Inter-storey drifts, Storey shears and Capacity curves. All the analysis is being carried out using the software ANSYS.