Title:
Investigation of Grouted Dowel Connections for Precast Wall Construction
Author(s):
Douglas J. Provost-Smith, Mohamed Elsayed, and Moncef L. Nehdi
Publication:
Structural Journal
Volume:
116
Issue:
1
Appears on pages(s):
41-50
Keywords:
bond strength; connection; development length; duct; precast concrete
DOI:
10.14359/51710860
Date:
1/1/2019
Abstract:
The grouted dowel connection has been simple, cost-effective, and widely used in precast concrete structural systems. The grouted bar length in this connection is currently designed similarly to a regular steel bar in reinforced concrete. This underestimates the connection’s bond strength, thus resulting in excessive connection length. The effect of the duct’s presence in this connection is examined in the present study and was found to be crucial in generating a considerable confinement effect and relatively larger bond stress than accounted for in current design codes. Full-scale pullout tests were performed, and their results were compared with relevant data in the open literature to develop a more accurate design equation for predicting the required dowel development length. The equation was found to produce results three times smaller than that determined by the ACI 318-14 code while being desirably 10% more conservative than equations proposed in previous research.
Related References:
ACI Committee 318, 2014, “Building Code Requirements for Structural Concrete (ACI 318-14) and Commentary (ACI 318R-14),” American Concrete Institute, Farmington Hill, MI, 520 pp.
Crisafulli, F. J.; Restrepo, J. I.; and Park, R., 2002, “Seismic Design of Lightly Reinforced Precast Concrete Rectangular Wall Panels,” PCI Journal, V. 47, No. 4, pp. 104-121. doi: 10.15554/pcij.07012002.104.121
Darwin, D., and Zavaregh, S. S., 1996, “Bond Strength of Grouted Reinforcing Bars,” ACI Structural Journal, V. 93, No. 4, July-Aug., pp. 486-495.
Einea, A.; Yamane, T.; and Tadros, M. K., 1995, “Grout-Filled Pipe Splices for Precast Concrete Construction,” PCI Journal, V. 40, No. 1, pp. 82-93. doi: 10.15554/pcij.01011995.82.93
Einea, A.; Yehia, S.; and Tadros, M. K., 1999, “Lap Splices in Confined Concrete,” ACI Structural Journal, V. 96, No. 6, Nov.-Dec., pp. 947-955.
Eligehausen, R.; Popov, E. P.; and Bertero, V. V., 1983, “Local Bond Stress-Slip Relationships of Deformed Bars under Generalized Excitations,” Report No. UCB/EERC-83/23, Earthquake Engineering Research Center, Universisty of California, Berkeley, Berkeley, CA.
Goto, Y., 1971, “Cracks Formed in Concrete Around Deformed Tension Bars,” ACI Journal Proceedings, V. 68, No. 4, Apr., pp. 244-251.
Hosseini, S. J. A.; Rahman, A. B. A.; Osman, M. H.; Saim, A.; and Adnan, A., 2015, “Bond Behavior of Spirally Confined Splice of Deformed Bars in Grout,” Construction and Building Materials, V. 80, pp. 180-194. doi: 10.1016/j.conbuildmat.2014.12.097
Jansson, P., 2008, “Evaluation of Grout-Filled Mechanical Splices for Precast Concrete Construction,” Michigan Department of Transportation, Lansing, MI, 72 PP.
Ling, J. H.; Ahmad, A. B.; and Ibrahim, I. S., 2014, “Feasibility Study of Grouted Splice Connector under Tensile Load,” Construction and Building Materials, V. 50, pp. 530-539. doi: 10.1016/j.conbuildmat.2013.10.010
Ling, J. H.; Ahmad, A. B.; Ibrahim, I. S.; and Hamid, Z. A., 2012, “Behaviour of Grouted Pipe Splice under Incremental Tensile Load,” Construction and Building Materials, V. 33, pp. 90-98. doi: 10.1016/j.conbuildmat.2012.02.001
Matsumoto, E. E.; Waggoner, M. C.; Kreger, M. E.; Vogel, J.; and Wolf, L., 2008, “Development of a Precast Concrete Bent-Cap System,” PCI Journal, V. 53, No. 3, pp. 74-99. doi: 10.15554/pcij.05012008.74.99
Priestley, M. J. N.; Sritharan, S.; Conley, J. R.; and Pampanin, S., 1999, “Preliminary Results and Conclusions From the PRESSS Five-Story Precast Concrete Test Building,” PCI Journal, V. 44, No. 6, pp. 42-67. doi: 10.15554/pcij.11011999.42.67
Raynor, D. J.; Lehman, D. E.; and Stanton, J. F., 2002, “Bond-Slip Response of Reinforcing Bars Grouted in Ducts,” ACI Structural Journal, V. 99, No. 5, Sept.-Oct., pp. 568-576.
Steuck, K. P.; Eberhard, M. O.; and Stanton, J. F., 2009, “Anchorage of Large-Diameter Reinforcing Bars in Ducts,” ACI Structural Journal, V. 106, No. 4, July-Aug., pp. 506-513.
Untrauer, R. E., and Henry, R. L., 1965, “Influence of Normal Pressure on Bond Strength,” ACI Journal Proceedings, V. 62, No. 5, May, pp. 577-586.