A Study on Effective Location of Shear Wall

A Study on Effective Location of Shear Wall

Author Name : Varun Kumar Sikka, Sahil

ABSTRACT

The practice before 1960s has been to design buildings primarily for gravity loads and check the adequacy of the structure for safety against lateral loads. It is established that the design of a multi-storey building is governed by lateral loads and it should be the prime concern of designer to provide adequate safety to structure against lateral loads. Many existing RC frame buildings located in seismic zones are deficient to withstand earthquakes. Insufficient lateral resistances and poor detailing of reinforcement are the main reasons for inadequate seismic performance. Shear wall system is one of the most commonly used lateral-load resisting technique for high-rise buildings. Shear walls have very high in-plane strength and stiffness, which can be used simultaneously for resisting large horizontal and gravity loads. In tall buildings, it is very important to ensure adequate lateral stiffness to resist lateral load. The aim of this project is to determine the solution for shear wall location in multi-storey building. For this purpose four different models eight storeyed building each has been considered i.e. one model without shear wall and other three with shear walls in different zones. Models are studied in all the four zones for comparing lateral displacement and load transfer to various structural elements with different positioning of shear wall. Earthquake load is calculated as per IS: 1893-2002 (Part-1), the various parameters like response reduction factor, importance factor, zone factor are taken from IS: 1893-2002 (Part-1) and are applied to a building located in Zone II, Zone III, Zone IV and Zone V. The buildings are modelled using software ETAB Nonlinear v 9.7.2. Providing shear walls at adequate locations substantially reduce the displacements due to earthquake. Hence accounting shear wall in a building will form an efficient lateral force resisting system.