ANALYSIS AND DESIGN OF MULTI-STOREYED LOAD BEARING REINFORCED MASONRY STRUCTURE AND FRAMED RC STRUCTURE

Abstract

Load bearing masonry structures in India are generally restricted to 3 or 4 storeys in height. This is mainly because of lack of availability of good quality masonry unit and associated workmanship. Also, it is generally perceived that load bearing masonry storey may perform in brittle manner under excessive lateral loads. However, with the advancement of availability of engineered hollow concrete blocks which has a scope to introduce reinforcement, it is perhaps possible to design and eventually construct multi-storeyed reinforced masonry building. In this paper an attempt has been made to analyse and design the structural components of a multi-storeyed residential building using reinforced hollow concrete block masonry. (i) Residential occupancy in ground floor + 8 floors. The building is analysed and designed for all the load combination as per the codal provisions. Later the same building is analysed and design by considering it as conventional RC framed structure system. The structural comparison of both of them has been made. Based on the study it is found that the requirement of reinforcing steel and concrete is significantly lesser, when compared to building designed as load bearing masonry system. It is also found that masonry prism strength of 7.5MPa with nominal vertical reinforcement is adequate to withstand the combination of axial and lateral loads.