Enhancement of ductility of existing seismic steel moment connections

Citation
Sj. Chen et al., Enhancement of ductility of existing seismic steel moment connections, J STRUC ENG, 127(5), 2001, pp. 538-545
Citations number
13
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Civil Engineering
Journal title
JOURNAL OF STRUCTURAL ENGINEERING-ASCE
ISSN journal
0733-9445 → ACNP
Volume
127
Issue
5
Year of publication
2001
Pages
538 - 545
Database
ISI
SICI code
0733-9445(200105)127:5<538:EODOES>2.0.ZU;2-J
Abstract
The fracture of beam-to-column connections of steel buildings in the Northr idge and Kobe earthquakes generated concerns about the reliability of curre nt design and construction technology for steel connections. The same type of fracturing may occur at similar beam-to-column connections of steel buil dings in other seismically active, areas. A simple method is proposed here to enhance the ductility of beam-to-column connections of existing building s. By trimming the bottom flange of the beam slightly the ductility of the connection can be greatly improved, Experimental studies of the newly desig ned connections under cyclic load show that the ultimate strengths are almo st unaltered however, the plastic rotational capacity call be increased sig nificantly. When adopting the proposed method, the only work needed is to t rim part of the bottom flange plate, and this can be done without removing the floor slab. The proposed connection method can be easily implemented to enhance the ductility of beam-to-column connections of existing buildings.