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http://dx.doi.org/10.5000/EESK.2002.6.3.011

Evaluation of Ductility Capacity of Reinforced Concrete Bridge Columns Subject to Cyclic Loading Using Flexibility-Based Fiber Element Method  

고현무 (서울대학교 지구환경시스템 공학부)
조근희 (유니슨기술연구소)
조호현 (서울대학교 지구환경시스템 공학부)
Publication Information
Journal of the Earthquake Engineering Society of Korea / v.6, no.3, 2002 , pp. 11-21 More about this Journal
Abstract
The evaluation of displacement ductility is performed by direct method through tracking the inelastic hysteretic behavior of RC bridge columns subject to cyclic loading using a flexibility-based fiber element mode. To reasonably track the inelastic behavior until the RC bridge column reaches its ultimate state, the average stress-average strain relations and joint elements, which agree well with experiments, are modified and applied considering the tension stiffening behavior and discontinuous displacement between the column and its base. In addition the evaluation of displacement ductility is performed by a direct method easily applicable to numerical analysis. Locations for the integration points, values for the post-crushing concrete strength and low-cycle fatigue failure of longitudinal reinforcement that affect the calculation of yielding and ultimate displacements are proposed for the application to flexibility-based fiber element model. Since less than 10% of error occurs during the displacement ductility analysis, the yielding and ultimate displacements evaluated by the applied analysis method and model appear to be valid.
Keywords
flexibility-based fiber element method; reinforced concrete bridge column; cyclic loading; ductility capacity;
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