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http://dx.doi.org/10.5000/EESK.2009.13.3.067

Characteristics of Stress-strain Relationship of Concrete Confined by Lateral Reinforcement  

Jeong, Hyeok-Chang (울산대학교 건설환경공학부)
Kim, Ick-Hyun (울산대학교 건설환경공학부)
Publication Information
Journal of the Earthquake Engineering Society of Korea / v.13, no.3, 2009 , pp. 67-80 More about this Journal
Abstract
The basic concept of seismic design is to attain the ductility required in a design earthquake. This ductility can be obtained by providing sufficient lateral confinements to the plastic hinge regions of columns. The most cost-effective design might be derived by determining the proper amount of lateral confinement using a stress-strain relationship for confined concrete. Korean bridge design code requires the same amount of lateral confinement regardless of target ductility, but Japanese design code provides the stress-strain relationship of the confined concrete to determine the amount of lateral confinement accordingly. While design based on material characteristics tends to make the design process more involved, it makes it possible to achieve cost-effectiveness, which is also compatible with the concept of performance-based design. In this study, specimens with different numbers of lateral confinements have been tested to investigate the characteristics of the stress-strain relationship. Test results were evaluated, using several empirical equations to quantify the effects.
Keywords
Stress-strain Relationship; Confined concrete; Lateral confinement;
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