Seismic Performance of Pre-Northridge Welded Steel Moment Connections to Built-Up Box Columns

Results of experimental and analytical investigations of the seismic response of fully restrained steel moment connections between deep W-shape beams and deep and square built-up box columns are presented. Prototype beam-column connections were selected from steel moment-resisting frames in a structure built before the 1994 Northridge earthquake. Two full-size, single sided, pre-Northridge box column connection assemblage specimens were fabricated using prototype connection data. Pretest analyses showed responses of box column connections can be substantially different from W-shape column connections. Both specimens were tested using a standard connection prequalification test protocol and each failed by brittle fracture in the complete joint penetration (CJP) welds of the beam flanges at connection drift angles less than 0.8% rad. The pre-Northridge beam flange CJP welds are likely to fail in a brittle manner regardless of the type of column cross section. ABAQUS finite-element models of the specimens were validated using test results. Locations of the cracks in the beam flange CJP welds coincide with the region of high axial stresses, which varies depending on the column type, presence of continuity plates, and thickness of box-column plates.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/07339445
• Supplemental Notes:
  • Abstract reprinted with permission from ASCE
• Authors:
  • Kim, Taejin
  • Stojadinovic, B
  • Whittaker, Andrew S
• Publication Date: 2008-2

Language

• English

Media Info

• Media Type: Print
• Features: Figures; Photos; References; Tables;
• Pagination: pp 289-299
• Serial:
  • Journal of Structural Engineering
  • Volume: 134
  • Issue Number: 2
  • Publisher: American Society of Civil Engineers
  • ISSN: 0733-9445
  • Serial URL: http://ascelibrary.org/loi/jsendh

Subject/Index Terms

• TRT Terms: Columns; Earthquake resistant design; Earthquake resistant structures; Seismicity; Structural connection; Structural members; Welds
• Identifier Terms: Northridge Earthquake, January 17, 1994
• Uncontrolled Terms: Moment connections; Moment resisting frames
• Geographic Terms: Northridge (California)
• Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 01088949
• Record Type: Publication
• Files: TRIS
• Created Date: Feb 25 2008 2:37PM