SEISMIC FRAGILITY ANALYSIS OF MULTI-STORY RC SHEAR WALL-FRAME SYSTEM FOR ASSESMENT OF GLOBAL BEHAVIOR

With the development of cities and the rapid growth of population, buildings tend to become taller. Most of these buildings, which are located in seismic prone areas, rely on the reinforced concrete shear wall as a primary lateral load resistance system, thereby developing an accurate analytical model to analyze such a system under the earthquake excitation is required. Hence, a numerical model of seven-story RC shear wall–frame system was developed with the fiber-force element by using OPENSEES simulation platform and validated based on experiment on a real structure. After assurance of the accuracy of the numerical model, three damage states, e.g. occurrence of the first inelastic deformation (Slight or DS(I)), the onset of yielding of rebar and/or crushing of concrete (Moderate or DS(II)), and instability and collapse (Severe or DS(III)) of the system were defined and after that, the IDA has been run to create the fragility curve under near-field and far-field records to assess the global behavior and performance of such a system under seismic excitation. The results showed that the behavior of the system under near-field and the far-field record was identical at slight and moderate damage state and a little discrepancy was observed, which was ignorable. However, at Severe damage state, the probability of collapse of the studied structural system in low-range to mid-range of response spectra acceleration (0