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http://dx.doi.org/10.5000/EESK.2003.7.3.047

Seismic Design of Buckling-Restrained Braced frame Using Equivalent Energy Concept  

김진구 (성균관대학교 건축공학과)
최현훈 (성균관대학교 건축공학과)
원영섭 (성균관대학교 건축공학과)
Publication Information
Journal of the Earthquake Engineering Society of Korea / v.7, no.3, 2003 , pp. 47-55 More about this Journal
Abstract
This study proposed a convenient seismic design procedure for buckling-restrained braced frames based on the equivalent energy concept. The design process begins with the computation of input energy from response spectrum. Then the elastic energy and plastic energy are computed based on the equal energy concept. The computed plastic energy is distributed to each story along energy distribution ratio and the cross-sectional area of each brace is computed so that all the plastic energy is dissipated by the brace. The proposed procedure was applied to the design of three-, six-, and twenty-story steel frames with buckling-restrained braces, and artificial earthquake records were used for verification of the proposed method. According to analysis results, top story displacements of the low-rise structure satisfies the given target displacement however that of the twenty-story structure was much smaller than the given target displacement.
Keywords
equivalent energy concept; buckling-restrained brace; hysteretic energy; seismic design;
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