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Seismic analysis of steel moment frames with column-tree connections

Title
Seismic analysis of steel moment frames with column-tree connections
Author
유은종
Keywords
Column-tree connection; Splice slip; Weak panel zone; Steel intermediate moment frame; Nonlinear dynamic analysis
Issue Date
2019-11
Publisher
ELSEVIER SCI LTD
Citation
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH, v. 168, article no. 105871, Page. 1-16
Abstract
Column-tree connections are commonly used for steel moment frame buildings in East Asian countries because they can reduce labor and construction time. However, a column-tree connection has an inherent issue of splice slip between the stub beams and the mid-portion of the beam. In this study, analytical modeling to account for slip behavior of the column-tree connection is proposed and examined by comparing sub-assemblage test results and then applied to a nonlinear dynamic analysis of steel intermediate moment frame (SIMF) buildings. In the nonlinear dynamic analyses, two example buildings that use welded unreinforced flange-welded web connections and column-tree type connections, respectively, were designed, and their responses were compared. Comparison of the analysis results to sub-assemblage test results indicate that a macro model based on the lumped plasticity assumption can adequately simulate the behavior observed in test results. The distribution of plastic deformations among the beam, column, and beam-to-column joint was similar to those of the test results. The nonlinear dynamic analyses indicated that column-tree connections with a splice slip have positive effects on frames with a weak panel zone. The splice slip increased the rotational capacity of the assembly and reduced the inelastic demand of the panel zone because early slips occur at the beam splice before the weak panel zone yields. Column-tree construction is therefore a viable method for constructing SIMF buildings in areas of low-to-medium seismicity.
URI
https://www.sciencedirect.com/science/article/pii/S0143974X18311544?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/154784
ISSN
0143-974X
DOI
10.1016/j.jcsr.2019.105871
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ARCHITECTURAL ENGINEERING(건축공학부) > Articles
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