Open AccessSeismic Performance of WUF-W Moment Connections According to Access Hole Geometries
Author(s) -
Han Sang Whan,
Jung Jin,
Ha Sung Jin
Publication year - 2016
Publication title -
earthquake spectra
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.134
H-Index - 92
eISSN - 1944-8201
pISSN - 8755-2930
DOI - 10.1193/060614eqs082m
Subject(s) - flange , connection (principal bundle) , structural engineering , brittleness , welding , beam (structure) , moment (physics) , engineering , frame (networking) , brittle fracture , finite element method , geometry , materials science , fracture (geology) , geology , geotechnical engineering , mathematics , physics , mechanical engineering , composite material , classical mechanics
The welded unreinforced flange-welded web (WUF-W) moment connection is an all-welded moment connection, which is one of the prequalified connections for the special moment frame (SMF) specified in AISC 358-10. However, previous experimental studies reported that WUF-W connections with a beam depth of 890 mm failed as a result of brittle beam flange fracture and did not satisfy the requirement for the SMF connection specified in AISC 341-10. In this study, a finite element analysis (FEA) was conducted to investigate the cause of the brittle failure in the WUF-W connection. This study observed that the brittle failure occurred in WUF-W connections was mainly attributed to the access hole geometry. This study proposed the improved access hole geometry to prevent brittle failure from WUF-W connections. To verify the analysis results, this study conducted an experimental test using one WUF-W connection specimen with an improved access hole geometry.
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