Behavior of reinforced concrete structure with and without infill

As rapid growth in population large number of RCC buildings and Steel structures were constructed across the world for residential as well as for public and commercial purposes. Public buildings like Schools, Colleges, Government Offices, Hospitals etc, and commercial buildings like Cinema halls, Shopping mall etc. So the buildings were constructed with RC frames and in the building construction more importance and design consideration is given to RC frames and Masonry infills are considered only to cover the RC frame voids and also to give aesthetic appearance. As the masonry infills are considered only as a void filling element between vertical and horizontal resisting elements of the building frames and assuming that these infills will not resist any loads either axial or lateral. Therefore the masonry infill is not considered in the analysis of frames generally. There is no availability of any kind of realistic and simple analytical models of infill which is the one of the point to skip the infill in the analysis of RC frames. But actually the infill contributes some stiffness to the frame which can reduce the deflection in the frames under lateral load. So this negligence is one of the causes of failure of many multi-storied buildings it may be a RCC building or a steel building. In this study 2D finite element model is developed using FEM software ETABS to determine the behavior of RC framed structures with and without infill under lateral loads especially wind load. In this analysis a bare RC frame is analyzed under wind load, and RC frame with infill that is infill is modeled as a “Equivalent diagonal strut� with single and double struts of concrete and brick properties with varying sizes under lateral load (wind load) is analyzed and compared.