International Journal of Modern Trends in Engineering and Research www.ijmter.com e-ISSN No.:2349-9745, Date: 28-30 April, 2016 @IJMTER-2016, All rights Reserved Study of NSPs and NTH Analyses of RCMRFs Mohd Zameeruddin 1 ,Keshav K. Sangle 2 1 Department of Structural Engineering, Veermata Jijabai Technological Institute, Mumbai, zameerstd1@hotmail.com 2 Department of Structural Engineering, Veermata Jijabai Technological Institute, Mumbai, kksangle@vjti.org.in Abstract—From mid-90s, through further development of computer technology in civil engineering, the more complex seismic analysis became possible and their accuracy has been increased. For performance evaluation of RC structures subjected to seismic loads, both Nonlinear Static (NSPs) and Nonlinear Time-history (NTH) procedures are employed. Performance-based Seismic Engineering (PBSE), a predictive method of seismic assessment had put forth various performance evaluation procedures using NSPs. These procedures are ATC 40 (CSM), FEMA 356 (DCM), ASCE 41 (DCM), and FEMA 440 (CSM). In nonlinear analysis method, geometric nonlinearity and behavior of material beyond the linear elastic limit are taken into consideration. Artificial or recorded ground motion records are employed for NTH. The objective of this study is to assess the available performance evaluation procedures, for the study RCMRFs representing low-rise, medium height and high-rise structures, which were primarily designed according to IS 456, IS 1893 and IS 13920 design codes, by comparing NTH analysis results. The selected building is considered to be in a high seismicity region. Base shear forces, maximum roof drift and interstory drift were obtained as analysis results and the comparison of the above methods is made by using these results. Keywords-Nonlinear static analysis; nonlinear time-history analysis; base-shear forces; maximum inelastic displacements; interstory drift ratios _________________________________________________________________________________ I. INTRODUCTION Design and construction in India are generally regulated at the state or local level using codes prescribed by the bureau of Indian standards. These codes are intended to establish minimum requirement for providing safety of life and property from natural hazards. Experience learned from recent earthquakes which have occurred across the world has forced recognition to the level of structural and non-structural damage that can occur in code-compliant building which may not be consistent with acceptable performance [1]. Changes in the state of knowledge and development of seismic design criterion have led towards changes in engineering practices and research. In order to communicate the safety-related decisions, practice has been moved towards predictive methods for assessing potential seismic performance [2]. PBSE documents have provided several methods for analysis of structures. These methods may be linear elastic static or dynamic, and nonlinear static or dynamic [3]. The equivalent load method, presented in Indian seismic code is a static and linear elastic analysis method. In this method, nonlinear behavior of the structural system is taken care indirectly by using response reduction factor [4]. Amongst nonlinear methods NTH results is more accurate in computation of seismic demands, but due to its complexity and time-consuming rigorous procedure, are not widely using in ordinary engineering applications. The practicing design engineers prefer, NSPs because of simple and straightforward interpretation process [5]. PBSE had a strong favor for NSPs, suggested various performance evaluation procedures viz; ATC 40 (CSM), FEMA 356 (DCM), ASCE 41 (DCM) and