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A Study on the Flexural Performance of UHPC Precast Deck-Joint Interface by the Exposure of Steel Fiber

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http://www.scirp.org/journal/PaperInformation.aspx?PaperID=52685#.VKC_6cCAM4

As a solution against the serviceability problem caused by the cracks occurring at the UHPC precast deck-joint interface, this study proposes a method exposing the steel fiber at the interface and evaluates the corresponding flexural performance of the lap spliced construction joint. After having slowed down the strength development of the concrete placed in the joint of the precast deck by means of a curing retardant, the concrete at the interface is crushed so as to expose the steel fibers and the change in the flexural performance is observed experimentally according to the exposure of the steel fibers. The results show that, even if the ultimate strength and stiffness of the UHPC precast deck including the joint are mostly determined by the arrangement details of the rebar lap splice, the exposure of the steel fibers can secure stable ductile behavior and reduce the width of the cracks generated at the precast deck-joint interface under service load.
Cite this paper
Jung, K. , Park, S. , Kim, S. , Kim, B. and Cho, K. (2014) A Study on the Flexural Performance of UHPC Precast Deck-Joint Interface by the Exposure of Steel Fiber. Engineering, 6, 1000-1006. doi: 10.4236/eng.2014.613090.
 

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[6] Hwang, H.H., Yeo, I.S., Cho, K.H. and Park, S.Y. (2011) Evaluation of Flexural Strength for UHPC Deck Joints with Lap-Spliced Reinforced Steel Bar. Journal of Korea Institute for Structural Maintenance and Inspection, 15, 92-99. (In Korean)
http://dx.doi.org/10.11112/jksmi.2011.15.6.092
[7] Korea Road & Transportation Association (2010) Korean Highway Bridge Design Code. Korea Road & Transportation Association, Seoul.
[8] Korea Concrete Institute (2007) Concrete Design Code and Commentary. Korea Concrete Institute, Seoul.                     
[9] Kang, S.T., Park, J.J., Koh, G.T. and Kim, S.W. (2008) Evaluation on Flexural Capacity of Reinforced Concrete Beams with Ultra-High Performance Cementitious Composites. Journal of Korea Institute for Structural Maintenance and Inspection, 12, 81-90. (In Korean)eww141229lx
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