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Title |
Moment Redistribution and Plastic Deformation for Reinforced Concrete Moment-Resisting Frame Subjected to Earthquake Load
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Keywords |
모멘트재분배 ; 소성변형 ; 내진설계 ; 성능기반설계 ; 철근콘크리트 moment redistribution ; plastic rotation ; seismic design ; performance-based design ; reinforced concrete |
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Abstract |
A moment redistribution method was developed for earthquake design of reinforced concrete moment-resisting frames. For a frame designed with strong column-weak beam, the moment redistribution mechanism was investigated. Based on the result, the relationship between redistributed moment and plastic rotation in plastic hinges was established. By using the relationship, we developed a method for the evaluation of plastic rotations during the moment redistribution, addressing the effects of various design parameters including member stiffness, load condition, and plastic mechanism of structure. The proposed method was applied to the earthquake design of a 6-story and 3-bay moment-resisting frame. The design result was verified by the comparison with the result from conventional nonlinear analysis.
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