Distributed Flexibility Models for Nonlinear Analysis of RC Structuresby Sashi K. Kunnath, (A.M.ASCE), Univ of Central Florida, Orlando, United States,
Abstract: The application of distributed flexibility member models in inelastic analysis of reinforced concrete (RC) structural systems is examined. While the utilization of flexibility-based formulations is desirable in considering inelastic action at the plastic hinge zones of RC members, its application in practical analysis is not straightforward. A stiffness matrix developed from distributed flexibility concepts sometimes exhibits sudden changes in stiffness characteristics that is not consistent with expected behavior at a member cross-section. Two probable approaches to stiffness formulation using distributed flexibility are explored in this study with a view to assessing their suitability in nonlinear analysis of RC structures.
Subject Headings: Reinforced concrete | Concrete structures | Structural analysis | Structural models | Stiffening | Matrix (mathematics) | Mathematical models | Model tests
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