INTER-RELATIONSHIP OF VARIOUS TYPES OF INFILL WALLS AND GEOMETRICAL PARAMETERS OF RC FRAME BUILDING

Abstract

The infill wall serves as the supporting wall that closes the perimeter of a three dimensional framework structure-built building. In designs for calculating the seismic behaviour of RC frames, the infill is not treated as a structural element but just as a load providing element, resulting in erroneous conclusions and an incorrect prediction of the real seismic behaviour of the structure. The current study investigates the changes of various seismic characteristics of bare frame and brick infill using the equivalent diagonal strut technique (FEMA 356 and IS code 1893:2016), with a focus on the differences in seismic parameters between the various approaches. The fluctuation of differences is investigated by reducing densities and Young's modulus E in the same proportion. This research will look at a G+4 residential structure and use ETABS software to compute seismic characteristics namely storey shear, base shear, and storey drift. The results are graphically represented and reveal that the fluctuations of storey drift and storey displacement in infill walls calculated using IS 1893:2016 and in infill walls modelled using FEMA 356 are almost same whereas the fluctuations of storey shear and base shear in infill walls calculated using IS 1893:2016 are greater than in infill walls modelled using FEMA 356. Also, when the densities and Young’s Modulus are reduced till 60%, storey displacement and storey drift are found to be increased and storey shear are found to be decreased.