Seismic Analysis of Irregular RCC Rame and Review of Indian Seismic Code

Abstract

The destruction caused by Nepal earthquake reminds us of how unsafe our buildings are. Indian Seismic Code IS: 1893 (Part 1): 2002 has not been revised since last past 13 years even when there are substantial work in the field of earthquake resistant design of buildings. With the mission to bring upon some improvements in code of practices followed in India this work is carried forward. This work compares the work of practices mentioned in IS 1893:2002 with those put forward by ATC-40. This work gives the procedure to produce elastic design spectrum from site specific ground displacements. This is further reduced to design response spectrum through D-A-V 4D log graph. The definition of ductility is established and ductility curvature plots are drawn by which optimum percentage of steel reinforcement is established. Equal displacement and equal energy principle are discussed which are required to evaluate the value of response reduction factor R.