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http://dx.doi.org/10.12652/Ksce.2015.35.2.0287

Evaluation of Ductility in Reinforced Concrete Members Using Material Models in Eurocode2  

Choi, Seung Won (Chosun College of Science & Technology)
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.35, no.2, 2015 , pp. 287-297 More about this Journal
Abstract
In concrete structural design provisons, there is a minimum allowable strain of steel to ensure a ductility of RC members and a c/d is limited for the same purpose in EC2. In general, a ductility capacity of RC members is evaluated by a displacement ductility which is a ratio of ultimate displacement to yield displacement, and it is necessary to calculate accurately a yield displacement and an ultimate displacement to evaluate a displacement ductility. But a displacement in members is affected by various member characteristics, so it is hard to calculate a displacement exactly. In this study, a displacement ductility is calculated by calculating a yield displacement and an ultimate displacement through a moment-curvature relationship. The main variables examined are concrete strength, yield strength, steel ratio, spacing of confinement, axial force ratio and concrete ultimate strain. As results, as a concrete strength is increased, a ductility displacement is increased. But as yield strength, steel ratio, spacing of confinement and axial force ratio are increased, a displacement ductility is decreased. And a displacement ductility is necessary to calculate a response modification factor (R) of columns for seismic design, so it is appeared that it is important to calculate a displacement ductility more accurately.
Keywords
Displacement ductility; Yield displacement; Ultimate displacement; Moment-curvature relationship;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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