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Seismic Design of Mid-to-Low Rise Steel Moment Frames Based on Available Connection Rotation Capacity  

Ahn, Jae Kwon (서울대학교 대학원 건축학과)
Lee, Cheol Ho (서울대학교 건축학과)
Publication Information
Journal of Korean Society of Steel Construction / v.19, no.6, 2007 , pp. 715-723 More about this Journal
Abstract
A displacement-based seismic design procedure was proposed for mid-to-low-rise steel moment frames. The proposed method was totally different from the current R-factor approach in that it directly uses available connection rotation capacity as a primary design variable. To this end, the relationship between available connection rotation capacity and seismic response modification (R factor) was established first; this relationship has been a missing link in current ductility-based design practice. A step-by-step displacement-based iterative design procedure was then proposed and verified using inelastic dynamic analysis.
Keywords
Connection rotation capacity; Ductility; Overstrength; Response modification factor; Seismic design; Steel moment frames;
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