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Application of Performance-Based Design to Upgrade Unsymmetrical RC Building

S S Gehlot1 and Ravi K Sharma2
1. Department of Structural Engineering, MBM Engineering College, JNV University, Jodhpur
2. Department of Civil Engineering, CTAE, Maharana Pratap University of Agriculture and Technology, Udaipur

Abstract—Performance-based design is widely used to upgrade seismic deficient buildings. Such buildings, when subjected to severe ground motion, might suffer extensive damage or even collapse. Bhuj earthquake (2001) of India made thousands of people lose their lives and rendered millions to lose their houses. The extensive damage to RC building during this earthquake exposed the construction practices being adopted in India and generated a great demand for seismic evaluation and up-gradation of existing buildings. This paper discusses the procedure to upgrade a seismic deficient unsymmetrical reinforced concrete building and to examine the seismic performance of the upgraded building for desired performance levels. Seismic RC symmetrical building has been considered in this paper and up-gradation of this building has been done using Capacity Spectrum Method Pushover Approach. Performance point of the up-graded building has been determined by comparing the Capacity Spectrum Curve for the most critical push load case and Demand Spectrum Curve for the given site conditions. It has been shown that the performance after up-gradation lies in the linear range. It has been also demonstrated that up-gradation satisfies the life safety performance level. 

Index Terms—performance-based design, seismic deficient, capacity spectrum, pushover analysis, demand spectrum

Cite: S S Gehlot and Ravi K Sharma, "Application of Performance-Based Design to Upgrade Unsymmetrical RC Building," International Journal of Structural and Civil Engineering Research, Vol. 2, No. 3, pp. 81-89, August 2013.