Design of Precast Diaphragm Chord Connections for In-Plane Tension Demands
Publication: Journal of Structural Engineering
Volume 133, Issue 11
Abstract
This paper discusses the design and modeling of a welded chord connection commonly used in pretopped precast double tee panels. In conventional design, the chord is intended to achieve its tension strength based on the axial capacity of the anchorage bars. An experimental study has shown that premature failure of the weld and flexure of the bar may occur, significantly reducing the tension capacity of the connection. A detailed finite-element model is developed and verified with experimental data and used for a parametric investigation. The results indicate that a ductile chord connection, with predictable capacity, can be achieved through concentric placement of the welds relative to the anchorage bar. Variations in faceplate thickness and weld throat are found to alter the load path but do not prevent premature failure. Mechanical debonding of the anchorage bars is found to significantly enhance the deformability of the connection. These findings are incorporated in a force and displacement based design procedure for the chord connection; an example is included for illustration.
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Acknowledgments
The research was supported by a grant from the Precast Prestressed Concrete Institute, National Science Foundation, and the Pennsylvania Department of Transportation and a grant from the Commonwealth of Pennsylvania, Department of Community and Economic Development, through the Pennsylvania Infrastructure Technology Alliance.
References
Alsiwat, J. M., and Saatcioglu, M. (1992). “Reinforcement anchorage slip under monotonic loading.” J. Struct. Eng., 118(9), 2421–2438.
American Concrete Institute (ACI). (2005). “Building code requirements for structural concrete and commentary.” ACI318-05, Farminton Hills, Mich.
American Welding Society (AWS) Structural Welding Committee. (1992). “Structural welding code.” AWS D1.4-92, Miami.
Fleischman, R. B., et al. (2005). “Seismic design methodology for precast concrete diaphragms. Part 2: Research program.” Math. Intell., 50(6), 14–31.
Naito, C., Peter, W., and Cao, L. (2006). “Development of a seismic design methodology for precast diaphragms—Phase 1 summary report.” ATLSS Rep. No. 06-01, ATLSS Center, Lehigh Univ., Pa.
Precast and Prestressed Concrete Institute (PCI). (2004). PCI design handbook, 6th Ed., Chicago.
Witte, F. C., et al. (2005). DIANA–Finite element analysis user’s manual, Release 9, TNO Building Construction and Research, Delft, The Netherlands.
Information & Authors
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Copyright
© 2007 ASCE.
History
Received: Feb 8, 2006
Accepted: Jun 9, 2006
Published online: Nov 1, 2007
Published in print: Nov 2007
Notes
Note. Associate Editor: Yahya C. Kurama
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