An Analytical review of Change in Steel Reinforcement of Columns for Building Frame with Infill walls and without Infill Walls .

Abstract

 In concrete frames, masonry walls are generally provided as infills .These infills are considered as non structural members. In structural calculations, only mass of these infill walls is considered in load calculations. Structural properties such as strength and stiffness are generally neglected. It was observed that the performance of structures containing infill walls was better during earthquake as compared to those without infill walls. Behavior of infill is like a compression member between columns and beams. Compression forces are transferred from one node to another node. Infill walls resist lateral forces. Capacity of resisting lateral forces can be slightly reduced due to openings in the wall. Moment resisting capacity of the frame is appreciably affected because of infill walls. They play significant role to enhance the lateral stiffness of whole frame. Lateral deflection is significantly lowered in the case of infilled frame as compared to the frame without infill walls. In the current topic under study, we have focused on the change in column moments and thereby change in steel requirement in columns due to infill walls.