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Effects of panel zone strength and beam web connection method on seismic performance of reduced beam section steel moment connections

Cited 61 time in Web of Science Cited 73 time in Scopus
Authors
Lee, Cheol-Ho; Jeon, Sang-Woo; Kim, Jin-Ho; Uang, Chia-Ming
Issue Date
2005-12
Publisher
American Society of Civil Engineers (ASCE)
Citation
J. Struct. Engrg. 131(12), 1854-1865
Keywords
ConnectionsBeamsSteel framesSeismic designDesign criteriaMoments
Abstract
This paper presents test results on eight reduced beam section (RBS) steel moment connections. The testing program addressed
web connection type (bolted versus welded) and panel zone (PZ) strength as the key variables. Specimens with medium PZ strength were designed to promote energy dissipation from both PZ and RBS regions such that expensive doubler plates were not needed. Both strong and medium PZ specimens with a welded web connection were able to provide satisfactory connection rotation capacity for special moment-resisting frames. However, specimens with a bolted web connection performed poorly due to premature brittle fracture of the beam flange at the weld access hole. A plausible explanation for the higher incidence of base metal fracture in bolted web specimens was presented based on the measured strain data. Test results from this study and by others showed that panel zones could easily develop a plastic rotation of 0.01 rad without causing distress to the beam flange groove welds. At this deformation level, the amount of beam distortion (i.e., buckling) was about one half that developed in strong PZ specimens. A criterion for a balanced PZ strength that improves the plastic rotation capacity while reducing the amount of beam buckling is proposed.
ISSN
0733-9445
Language
English
URI
http://hdl.handle.net/10371/7999
DOI
https://doi.org/10.1061/(ASCE)0733-9445(2005)131:12(1854)
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Architecture and Architectural Engineering (건축학과)Journal Papers (저널논문_건축학과)
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