PERFORMANCE EVALUATION OF R.C. MOMENT RESISTING ASYMMETRIC FRAME UNDER SEISMIC LOADS USING NON-LINEAR DYNAMIC ANALYSIS

Abstract

Engineering structures are often very complex and difficult to analyze for their dynamic, or vibrational, seismic behavior. Structures subjected to force such as earthquake must be structurally resisted as they are dynamic in nature.Hence, structure’s response is also dynamic and that’s what causes the unsafe and uncomfortable conditions. Modern performance-based design methods require ways ofidentifying the structure’s realistic behavior of structures under such conditions. To determine structural response beyond the yield point, out of two types of nonlinearity i.e. material and geometrical, material nonlinearity is considered in present paper. Incremental dynamic analysis (IDA) as well as Static Pushover Analysis (SPA) includes performance- based structure analysis. But incremental dynamic analysis is pretty accurate, and this method can obtain actual response of the structure from the particular earthquake
considered earthquake. It involves conducting a series of nonlinear dynamic analyzes in which the intensity of the ground motion selected for the collapse investigation is incrementally increments until the global collapse capacity of the structure is reached. In the present Paper, non-linear dynamic of reinforced concrete 8 storey building is carried out. The above frame is designed as per provisions of IS-456:2000, IS-1893(Part1):2016. Nonlinear Time History Analysis (NLTHA) & Incremental Dynamic Analysis (IDA) of above frames are performed using SeismoStruct Software. NLTHA and IDA will be performed for set of 6 artificial ground motions. Finally, Performance evaluation is done from the performance criteria mentioned in ATC-40 and FEMA-356 in terms of displacement profile and Interstorey Drift profile.