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Simplified Nonlinear Dynamic Progressive Collapse Analysis of Welded Steel Moment Frames Using Collapse Spectrum  

Lee, Cheol Ho (서울대학교 건축학과)
Kim, Seon Woong (서울대학교 건축학과)
Lee, Kyung Koo (서울대학교 건축학과)
Han, Kyu Hong (서울대학교 건축학과)
Publication Information
Journal of Korean Society of Steel Construction / v.21, no.3, 2009 , pp. 267-275 More about this Journal
Abstract
This paper presents the behavior of column-removed double-span beams in welded steel moment frames and proposes a simplified nonlinear dynamic analysis method for the preliminary evaluation of progressive collapse potential. The nonlinear finite element analysis and the associated analytical study showed that the column gravity load and the beam span-to-depth ratio govern the maximum dynamic deformation demand of the double-span beams. Based on these results, the concept of a collapse spectrum, which describes the relationship between the gravity load parameter and the maximum chord rotation of the double-span beams, was newly proposed. A procedure for the application of the collapse spectrum to multi-story welded steel moment frames was then suggested. The inelastic dynamic finite element analysis results showed that the proposed method gives satisfactory prediction of the nonlinear progressive collapse behavior of welded steel moment frames.
Keywords
Progressive collapse; Steel moment frames; Simplified method; Collapse spectrum; Nonlinear dynamic; Finite element analysis;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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