An Analytical Model for Capacity Curves Generation and Damage Prediction of Masonry Structures
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In this paper a planar-frame analytical model with openings is presented. The model deals with seismic analysis using the Pushover method for medium-to-short masonry buildings. Each wall with opening can be decomposed into parallel structural walls made of an assemblage of piers and a portion of spandrels. As formulated, the structural model undergoes inelastic flexural as well as inelastic shear deformations. The mathematical model is based on the smeared cracks and distributed plasticity approaches. Both zero moment location shifting in piers and in spandrels can be evaluated. The constitutive laws are modeled as bilinear curves in flexure and in shear. A biaxial interaction rule for both axial force - bending moment and axial force – shear force are considered. An event-to-event strategy is used to solve the nonlinear problem. A application was used to show the ability of the proposed model to analyze unreinforced masonry structures. Relevant findings are compared to analytical results from experimental, simplified models and finite element models using ETABS finite element package
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