Analytical and Numerical Framework for the Seismic Assessment of Infilled RC Frames
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This dissertation proposes a framework of computational and analytical tools for the efficient and accurate prediction of the nonlinear seismic behavior of buildings with masonry-infilled RC frames. The proposed framework includes a detailed numerical modeling methodology using diagonal struts, a simplified box modeling approach, as well as an analytical model developed for typical structures in California. The detailed strut model utilizes diagonal struts to simulate the effect of the masonry panels. The struts are systematically calibrated once the backbone curve is estimated based on the anticipated failure mechanism. The box model involves further simplifications to efficiently simulate the nonlinear performance of complex, multi-story buildings, for which the current methods can be cumbersome. The model uses a three-dimensional frame with two single-bay frames on the opposite sides of the building along the perimeter of the structure. The diagonal struts in these bays are appropriately calibrated to represent the estimated total response and possible eccentricity in each loading direction.