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Evaluation of Response Modification Factors for Steel Moment Frame Buildings Subjected to Seismic Loads  

Lee, Kihak (세종대학교 건축공학과)
Woo, Sungwoo ((주)한화건설 건축기술팀)
Publication Information
Journal of Korean Society of Steel Construction / v.18, no.5, 2006 , pp. 585-596 More about this Journal
Abstract
This study focuses on the seismic behavior of 3-, 9-, and 20-story steel moment resisting frame (MRF) structures designed in accordance with the 2000 International Building Code using different Response Modification factors (R factors), i.e., 8, 9, 10, 11, and 12. For a detailed case study, 30 different structures were evaluated for 20 ground motions representing the hazard level, which is equal to a 2% probability in 50 years (2% in 50 years). The results showed that the current R factors provide conservative designs for the 3- and 9-story buildings for the Collapse Prevention performance objective. the 20-story buildings, which were designed without using the minimum requirement of spectral acceleration CS prescribed in IBC 2000, did not satisfy the seismic performance for Collapse Prevention performance.
Keywords
Response modification factor; Earthquake engineering; Seismic performance evaluation; steel moment frame;
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