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http://dx.doi.org/10.5000/EESK.2017.21.1.059

Stress-Strain Model for Laterally Confined Concrete : Part II. Rectangular Sectional Members  

Sun, Chang Ho (University of Ulsan)
Jeong, Hyeok Chang (TAEIN ENC)
Kim, Ick hyun (University of Ulsan)
Publication Information
Journal of the Earthquake Engineering Society of Korea / v.21, no.1, 2017 , pp. 59-67 More about this Journal
Abstract
Due to a lack of the hoop action of lateral reinforcements the effective confining force in rectangular sections reduces compared to circular ones. Therefore, the stress-strain model obtained from the experimental data with circular sections overestimates the lateral confinement effect in rectangular sections, which evaluates seismic safety margin of overall structural system excessively. In this study experiments with laterally-confined square sections have been performed and the characteristic values composing stress-strain model have been analyzed. With introduction of section coefficients, in addition, the new unified stress-strain model applicable to square sections as well as circular ones has been proposed.
Keywords
Stress-strain model; Confined concrete; Lateral confinement; Square section;
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