Behavioral Study of Redundancy in Steel and RCC frames

Abstract

This paper describes the seismic analysis of steel and RCC 2D frames with and without masonry infill walls. The Seven storied frame with different number of bays is analyses. Different results of Time period, Base shear and displacement were obtained using software. It is observed that providing brick infill indicates considerable and acceptable effects as compared to bare frames and it was found that infill wall reduces the time period, displacement for steel as well as RCC frames. Masonry infill walls are found in most existing steel frame building systems. The masonry infill walls which are constructed after completion of steel frames are considered as non-structural elements. Although they are designed to perform architectural functions, masonry infill walls do resist lateral forces with substantial structural action .In addition to this, infill walls have a considerable strength and stiffness and they have significant effect on the seismic response of the structural system. There is a general agreement among of the researchers that infill frames have greater strength as compared to frames without infill walls. The presence of the infill walls increases the lateral stiffness considerably. Due to the change in stiffness and mass of the structural system, the dynamic characteristics change as well. In conventional analysis of infill frame systems, the masonry infill wall may be modeled using an equivalent strut model