SEISMIC ANALYSIS OF MASONRY STRUCTURE

Abstract

From the beginning of construction history, masonry have been most widely used material Because of its light weight, great durability, fire resistance, thermal insulating characteristics, relatively simple method of construction and execution, and low cost, masonry has been the most extensively used material in construction history. Apart from possessing such features, masonry is thought to have several disadvantages, such as distinct directional (orthotropic) qualities. weak strength, mortar connections without proper thickness, low interface binding strength between brick and mortar, poor treatment and improper methods of installation, etc., Chourasia, A. et. al. (2017) [6] . Besides, having weak strength and weak seismic behaviour masonry is still used heavily in construction for structures all around the world notably for low rise buildings up to three floors, as well as antique and medieval structures. Masonry can be used in construction with or without reinforcement; however, providing reinforcement improves masonry's seismic performance. Confined masonry is a relatively new type of masonry that has been presented, where light-reinforced frame elements (tie beams and columns) are utilized to enclose a masonry wall, the system acts as a single unit under load, providing ductility and strong seismic properties. Confined masonry has been found to be superior to reinforced masonry in some cases. In this report a residentials G+3 building in, Delhi has been studied, building in its natural form is constructed of masonry single brick thick with 250 mm concrete slab. The building is further modelled in ETABS (2018) [12] software with masonry as thin shell element of 230 mm thick and concrete slab of 250 mm thickness and dead, live and seismic load is applied on this building. Building is further modified and modelled in software with a 1) lintel band and 2) with confining elements (confined masonry) and change is seismic behaviour and capacity is studied.