Brace-Beam-Column Connections for Concentrically Braced Frames with Concrete Filled Tube Columns
Publication: Journal of Structural Engineering
Volume 130, Issue 2
Abstract
Composite concrete filled tube (CFT) columns are advantageous for use in seismic resistant braced frame construction since these CFT columns are relatively inexpensive, stiff and strong. However, to utilize the composite behavior of the columns, the vertical component of brace force must be transferred through the beam-brace-column connection and distributed to both the concrete and steel in the column. Beam-brace-column connection details are critical for development of this composite action. This paper describes analytical and experimental studies carried out to better understand the transfer and distribution of force to the joint. A range of beam-brace-column gusset plate connections were considered. It is shown that the majority of force transferred from the steel into the concrete occurs by bearing rather than by friction. Steel gusset plates with horizontal ribs, or gusset plates with holes, allow more force transfer and have more composite action than plain gusset plates. Slip deformations between the steel and concrete are likely to be too small to mobilize the strength of shear studs in these connections.
Get full access to this article
View all available purchase options and get full access to this article.
References
ACI. (1995). Building code requirements for reinforced concrete (ACI 318-99) and commentary.
AISC. (1994). Manual of steel construction, LRFD, American Institute of Steel Construction, Chicago.
AISC. (1997). Seismic provisions for structural steel buildings, American Institute of Steel Construction, Chicago.
Azizinamini, A. (1997). “Development of detail and design criteria for steel beams to CFT.” Progress Rep. at joint USJTCC Meeting, Monterey, Calif., October.
Cameron, B. (1997). “Bond behavior in concrete filled tube composite columns.” MSCE Thesis, Dept. of Civil and Environmental Engineering, Univ. of Washington, Seattle.
Emoto, J. (1996). “Bond stress demand in composite concrete and steel members.” MSCF thesis, Univ. of Washington, Seattle.
Galambos, T. V., and Chapuis, J. (1980). “LRFD criteria for composite columns and beam columns.” Revised Draft, Washington Univ. Dept. of Civil Engineering, St. Louis.
Gunderson, C. A. (2002). “Braced frame connections with concrete-filled tube (CFT) columns.” MSCE thesis, Univ. of Washington, Seattle.
Hajjar, J. F., Schiller, P. H., and Molodan, A.(1998a). “A distributed plasticity model for cyclic analysis of concrete-filled steel tube beam-columns and composite frames.” Eng. Struct., 20(4–6), 398–412.
Hajjar, J. F., Schiller, P. H., and Molodan, A.(1998b). “A distributed plasticity model for cyclic analysis of concrete-filled steel tube connections with interlayer slip.” Eng. Struct., 20(8), 663–676.
ICBO. (1997). “Uniform Building Code.” Int. Conf. Building Officials, Whittier, Calif.
ICC. (2000). “International building code.” Int. Cde Council, Whittier, Calif.
Prestressed Concrete Institute. (1985). PCI Design Handbook, Chicago.
Ricles, J., and Lu, L.-W. (1997). “Seismic performance of CFT column to WF beam connections.” Progress Rep., Joint USJTCC Meeting, Monterey, Calif., October.
Roeder, C. W., MacRae, G. A., and Waters, C. (2000). “Seismic behavior of steel braced frame connections to composite columns.” Steel Connections IV Workshop.
Schneider, S. P. (1996). “Connections to concrete-filled tube composite columns.” Rep. UIUL-ENG-96-2011, Univ. of Illinois, Urbana, Ill.
Shakir-Khalil, H. (1991). “Bond strength in concrete filled steel hollow sections.” ICSAS 91, 22–24, Int. Conf. on Steel and Aluminium Structures, 157–168, May.
Taylor, A. W. (1985). “A study of the behavior of simply supported composite beams.” A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Civil Engineering, Univ. of Washington, Seattle.
Virdi, K. S., and Dowling, P. J. (1975). “Bond strength in concrete filled circular steel tubes.” CESLIC Rep. CC11, Engineering Structures Laboratories, Civil Engineering Department, Imperial College, London, December.
Yura, J., and Jirsa, J. (1997). “Moment connections between steel beams and CFT columns.” Progress Rep. at Joint USJTCC Meeting, Monterey, Calif., October.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 130 • Issue 2 • February 2004
Pages: 233 - 243
Copyright
Copyright © 2004 American Society of Civil Engineers.
History
Received: Sep 11, 2002
Accepted: Mar 24, 2003
Published online: Jan 16, 2004
Published in print: Feb 2004
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.