Behavior of Longitudinal Joints in Staged Concrete Bridge Decks Subject to Displacements during Curing
Publication: Journal of Bridge Engineering
Volume 24, Issue 7
Abstract
Staged bridge deck construction is the practice whereby a portion of a bridge is left open to traffic while the closed portion is constructed, repaired, replaced, or widened. Traffic-induced deflections and vibrations during staged construction may affect the integrity of the longitudinal construction joint between the deck stages and the bond between reinforcing steel and concrete in this area. In this investigation, two test specimens were constructed using a simulated staged bridge deck construction process. To simulate traffic, the specimens were subjected to different magnitudes of differential deflections during curing of the second-stage concrete. Once the concrete achieved its specified compressive strength, the specimens were tested to failure to evaluate the integrity of the longitudinal construction joint and the bond between concrete and lap-spliced steel reinforcement in the construction joint region. Immediate damage caused by the induced differential displacements was minimal; only a single hairline crack was observed in each specimen at the location of maximum negative moment. When subjected to a flexural strength test, both specimens failed in flexure–compression at the end of the spliced reinforcement after substantial inelastic deformations had taken place. Additionally, strain data indicated that even when subjected to differential displacements during curing, the concrete–steel bond was capable of developing the actual yield strength of the reinforcing bars (558 MPa or 81 ksi).
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
The writers would like to acknowledge the support of the Wisconsin Department of Transportation under Project 0092-16-04. Laboratory testing was conducted with the guidance and aid of Jacob Zeuske. The contents of this report reflect the views of the authors who are responsible for the facts and accuracy of the data presented herein. The contents do not necessarily reflect the official views of the sponsors at the time of publication.
References
AASHTO. 2012. AASHTO LRFD bridge design specifications. Washington, DC: AASHTO.
ACI (American Concrete Institute). 2014. Building code requirements for structural concrete. ACI 318-14. Farmington Hills, MI: ACI.
Andrews, T. K. 2013. “Effect of differential movement of straight reinforcing bars during early age curing on the bond strength.” M.S. thesis, Dept. of Civil Engineering, Clemson Univ. https://tigerprints.clemson.edu/all_theses/1690/.
ASTM. 2017a. Standard practice for making and curing concrete test specimens in the field. ASTM C31/C31M-17. West Conshohocken, PA: ASTM.
ASTM. 2017b. Standard test method for compressive strength of cylindrical concrete specimens. ASTM C39/C39M-17b. West Conshohocken, PA: ASTM.
ASTM. 2017c. Standard test methods and definitions for mechanical testing of steel products. ASTM A370-17. West Conshohocken, PA: ASTM.
ASTM. 2017d. Standard specification for epoxy-coated steel reinforcing bars. ASTM A775/A775M-17. West Conshohocken, PA: ASTM.
Deaver, R. W. 1982. Bridge widening study. Forest Park, GA: Georgia Dept. of Transportation.
Furr, H. L., and F. H. Fouad. 1981. Bridge slab concrete placed adjacent to moving live loads. Rep. No. FHWA/TX-81/11 + 266-1F. College Station, TX: Texas A&M Univ., Texas Transportation Institute.
Harsh, S., and D. Darwin. 1984. Effects of traffic induced vibrations on bridge deck repairs. SM Report No. 9, 66. Topeka, KS: Kansas Dept. of Transportation.
Harsh, S., and D. Darwin. 1986. “Traffic-induced vibrations and bridge deck repairs.” Concr. Int. 8 (5): 36–42.
Issa, M. A. 1999. “Investigation of cracking in concrete bridge decks at early ages.” J. Bridge Eng. 4 (2): 116–124. https://doi.org/10.1061/(ASCE)1084-0702(1999)4:2(116).
Kwan, A. K. H., and P. L. Ng. 2007. “Effects of traffic vibration on curing concrete stitch: Part I —Test method and control program.” Eng. Struct. 29 (11): 2871–2880. https://doi.org/10.1016/j.engstruct.2007.01.029.
Ng, P. L., and A. K. H. Kwan. 2007. “Effects of traffic vibration on curing concrete stitch: Part II—Cracking, debonding and strength reduction.” Eng. Struct. 29 (11): 2881–2892. https://doi.org/10.1016/j.engstruct.2007.01.033.
Swenty, M. K., and B. A. Graybeal. 2012. Influence of differential deflection on staged construction deck-level connections. Rep. No. FHWA-HRT-12-057. McLean, VA: Federal Highway Administration, Office of Infrastructure Research and Development.
Weatherer, P. J., and B. D. Hedegaard. 2019. “Field evaluation of staged concrete bridge deck pours adjacent to live traffic.” J. Bridge Eng. 24 (4): 04019006. https://doi.org/10.1061/(ASCE)BE.1943-5592.0001367.
Information & Authors
Information
Published In
Copyright
© 2019 American Society of Civil Engineers.
History
Received: Apr 12, 2018
Accepted: Feb 6, 2019
Published online: May 3, 2019
Published in print: Jul 1, 2019
Discussion open until: Oct 3, 2019
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.