Cast Steel Connectors for Circular Hollow Section Braces under Inelastic Cyclic Loading
Publication: Journal of Structural Engineering
Volume 134, Issue 3
Abstract
Although concentrically braced frames are an efficient means of providing lateral support in steel structures, many such frames designed to resist seismic loading and featuring hollow structural section braces have performed poorly in recent earthquakes—primarily due to unexpected connection failures. To address this issue, the use of a cast steel connector that fits between a tubular brace and a gusset plate is presented as an alternative to the reinforced, fabricated connections that are commonly used in seismic load resisting braced frames. The resulting connector was shaped using solid modeling software, verified by finite-element analysis, and finally cast to ASTM A958 standards. Laboratory results from static and cyclic testing of concentrically loaded brace-connector assemblies showed that the use of a cast steel connector is a viable means of connecting to tubular brace members for seismic (or even static) applications. Further, as the connector was crafted to fit a range of tubular members and can be mass produced, the proposed solution is an economical alternative to conventional tube-to-gusset connections under seismic loading.
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Acknowledgments
Financial support was provided by the Natural Science and Engineering Research Council of Canada (NSERC)NRC and by the Ontario Centres of Excellence for Materials and Manufacturing. Atlas Tube Inc. provided steel tube and Walters Inc. (Ontario) generously donated their fabrication services.
References
AISC. (2005a). “Seismic provisions for structural steel buildings.” ANSI/AISC 341-05, ANSI/AISC 341s1-05, Chicago.
AISC. (2005b). “Specification for structural steel buildings.” ANSI/AISC 360-05, Chicago.
Armitage, R. (1983). “Development of cast node joints for offshore production platforms.” Solidification technology in the foundry and cast house, The Metals Society, London, 385–391.
Astaneh-Asl, A. (1998). “Seismic behavior and design of gusset plates.” Steel Tips Technical Information and Product Service—Structural Steel Educational Council, Moraga, Calif.
ASTM. (2000). “Standard specification for steel castings, carbon, and alloy, with tensile requirements, chemical requirements similar to standard wrought grades.” ASTM-A958-00, West Conshohocken, Pa.
ASTM. (2002). “Standard practice for castings, carbon, low-alloy, and martensitic stainless steel, ultrasonic examination thereof.” ASTM-A609/A609M-91, West Conshohocken, Pa.
ASTM. (2003a). “Standard specification for cold-formed welded and seamless carbon steel structural tubing in rounds and shapes.” ASTM-A500-03a, West Conshohocken, Pa.
ASTM. (2003b). “Standard specification for steel castings, surface acceptance standards, magnetic particle and liquid penetrant inspection.” ASTM-A903/A903M-99, West Conshohocken, Pa.
ASTM. (2006a). “Standard practice for steel castings, surface acceptance standards, visual examination.” ASTM-A802/A802M-95, West Conshohocken, Pa.
ASTM. (2006b). “Standard specification for structural bolts, alloy steel, heat treated, minimum tensile strength.” ASTM-A490-06, West Conshohocken, Pa.
Canadian Institute of Steel Construction (CISC). (2006). Handbook of steel construction, 9th Ed., Toronto.
Canadian Standards Association (CSA). (2001). “Limit states design of steel structures.” CAN/CSA-S16-01, Toronto.
Canadian Standards Association (CSA). (2003). “Welded steel construction (metal arc welding).” CAN/CSA-W59-03, Toronto.
Canadian Standards Association (CSA). (2004). “General requirements for rolled or welded structural quality steel/structural quality steel.” CAN/CSA-G40.20-04/G40.21-04, Toronto.
de Oliveira, J. C., Willibald, S., Packer, J. A., Christopoulos, C., and Verhey, T. (2006). “Cast steel nodes in tubular construction—Canadian experience.” Proc., 11th Int. Symp. and IIW Int. Conf. on Tubular Structures, Québec City, Québec, 523–529.
Elchalakani, M., Zhao, X.-L., and Grzebieta, R. (2003). “Tests of cold-formed circular tubular braces under cyclic axial loading.” J. Struct. Eng., 129(4), 507–514.
Fleischman, R. B., Sumer, A., Pan, Y., and Wan, G. (2004). “Development of modular connections for steel special moment frames.” Proc., 13th World Conf. on Earthquake Engineering, Vancouver, B.C., Canada.
Haddad, M., and Tremblay, R. (2006). “Influence of connection design on the inelastic seismic response of HSS steel bracing members.” Proc., 11th Int. Symp. and IIW Int. Conf. on Tubular Structures, Québec City, Québec, 639–649.
Kosteski, N., Packer, J. A., and Puthli, R. S. (2005). “Notch toughness of internationally produced hollow structural sections.” J. Struct. Eng., 131(2), 279–286.
Lee, K., and Bruneau, M. (2005). “Energy dissipation of compression members in concentrically braced frames: Review of experimental data.” J. Struct. Eng., 131(4), 552–559.
Marston, G. J. (1990). “Better cast than fabricated.” Foundryman, 83(3), 108–113.
Martinez-Saucedo, G. (2006). “Slotted end connections to hollow sections.” Doctoral thesis, Univ. of Toronto, Toronto.
Moaveni, S. (1999). Finite element analysis: Theory and application with ANSYS, Prentice-Hall, Upper Saddle River, N.J.
Poweleit, D., and Monroe, R. (2004). “Applying steel castings in structures.” Proc., SEAoT 2004 State Conf., Lakeway, Tex.
Schober, H. (2003). “Cast steel joints for tubular structures.” Proc., 10th Int. Symp. on Tubular Structures, Madrid, Spain, 143–152.
Swanson Analysis System (SAS). (2004). ANSYS workbench release 9.0, Houston.
Tremblay, R. (2001). “Seismic behavior and design of concentrically braced steel frames.” Eng. J., 38(3), 148–166.
Veselcic, M., Herion, S., and Puthli, R. (2003). “Cast steel in tubular bridges—New applications and technologies.” Proc., 10th Int. Symp. on Tubular Structures, Madrid, Spain, 135–142.
Yang, F., and Mahin, S. (2005). “Limiting net section fracture in slotted tube braces.” Steel Tips Technical Information and Product Service—Structural Steel Educational Council, Moraga, Calif.
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Published In
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© 2008 ASCE.
History
Received: Dec 5, 2006
Accepted: Jul 13, 2007
Published online: Mar 1, 2008
Published in print: Mar 2008
Notes
Note. Associate Editor: James S. Davidson
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