A Study on the Flexural Performance of UHPC Precast Deck-Joint Interface by the Exposure of Steel Fiber
- 1 Structural Engineering Research Division, SOC Research Institute, Korea Institute of Civil Engineering and Building Technology, Goyang-Si, Korea
- 2 Structural Engineering Research Division, SOC Research Institute, Korea Institute of Civil Engineering and Building Technology, Goyang-Si, Korea
- 3 Structural Engineering Research Division, SOC Research Institute, Korea Institute of Civil Engineering and Building Technology, Goyang-Si, Korea
- 4 Structural Engineering Research Division, SOC Research Institute, Korea Institute of Civil Engineering and Building Technology, Goyang-Si, Korea
- 5 Structural Engineering Research Division, SOC Research Institute, Korea Institute of Civil Engineering and Building Technology, Goyang-Si, Korea
Abstract
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.
- Graybeal, B.A. (2008) UHPC in the US Highway Transportation System. 2nd International Symposium on Ultra High Performance Concrete, Kassel, 11-17.
- Resplendino, J. (2008) Ultra-High Performance Concretes—Recent Realizations and Research Programs on UHPFRC Bridges in France. 2nd International Symposium on Ultra High Performance Concrete, Kassel, 31-43.
- Graybeal, B.A. and Swenty, M. (2012) UHPFRC for Prefabricated Bridge Component Connections. 3rd International Symposium on UHPC and Nanotechnology for High Performance Construction Materials, Kassel, 663-668.
- Hwang, H.H., Yoo, D.M., Park, S.Y. and Kim, B.S. (2009) Optimized Design of UHPC Bridge Deck Slab for Hybrid Cable-Stayed Girder Bridge. Proceeding of 13th REAAA Conference, Incheon, 1-12.
- Korea Institute of Civil Engineering and Building Technology (2012) Development of Deck Systems for Hybrid Cable-Stayed Bridge. KICT 2012-080, Goyang.
- 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
- Korea Road & Transportation Association (2010) Korean Highway Bridge Design Code. Korea Road & Transportation Association, Seoul.
- Korea Concrete Institute (2007) Concrete Design Code and Commentary. Korea Concrete Institute, Seoul.
- 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)