Performance of High Rise Reinforced Concrete Structures With and Without Infill Walls

Abstract

The most of human occupation is acquired by residential and office buildings for our living and working purposes. To fulfill the demand of urbanization high rise buildings becomes necessary which are more vulnerable to the effects of earthquakes. Despite of having similar structural frame, size and shape residential and office buildings exhibit different infill wall positions. Use of brick infills in building construction is most common practice in India, this practice results in the function of the masonry brick infill wall as a bracing system to stiffen and enhance the strength of the structure. The eight storey model analysis results show that the infill walls increase the stiffness and strength of structure and the use of masonry infill walls located in between the columns of RC framed structures plays a major role in the damage and collapse of buildings during strong earthquakes. This thesis highlights the performance of models at different seismic zones and compares the behavior of bare and infilled reinforced concrete structures by non linear static pushover analysis .The analysis is done by using the guidelines given for infill in following codes (IS 1893:2016 (Part –I), ATC-40 and FEMA-356) on SAP2000 software. Infill wall modeled as equivalent diagonal strut in which the width of struts of each infill panel is evaluated. Simultaneously the non-linear hinge properties also evaluated and assigned to prepared models on SAP. It is observed that brick infill walls present in RC frame building reduce the structural drift but increase the strength and stiffness.