A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Flexural Behavior of Ultra-High-Performance Fiber-Reinforced Concrete Moment Connection for Precast Concrete Decks
This article presents an experimental investigation of the flexural behavior of precast concrete moment connections filled with ultra-high-performance fiber-reinforced concrete (UHPFRC). The experimental program consisted of two phases. First, the bonding performance of steel reinforcing bars embedded in the UHPFRC was evaluated, using lap-spliced beam specimens with three different volumes of steel fibers. Second, the flexural behavior of the UHPFRC moment connections was investigated using 14 precast concrete beam specimens. The precast connections had a narrow joint width ranging from 250 to 100 mm (10 to 4 in.) and included three feasible noncontact splice details: straight bars, 90-degree hooked bars, and U-loop bars. Test results demonstrated the remarkable bonding characteristics of UHPFRC. The precast specimens with a joint width larger than 150 mm (6 in.) exhibited flexural behavior equivalent to that of a monolithic concrete beam specimen. Also, the anchorage provided by the hooked bars and U-loop bars did not appreciably contribute to the bonding strength.
Flexural Behavior of Ultra-High-Performance Fiber-Reinforced Concrete Moment Connection for Precast Concrete Decks
This article presents an experimental investigation of the flexural behavior of precast concrete moment connections filled with ultra-high-performance fiber-reinforced concrete (UHPFRC). The experimental program consisted of two phases. First, the bonding performance of steel reinforcing bars embedded in the UHPFRC was evaluated, using lap-spliced beam specimens with three different volumes of steel fibers. Second, the flexural behavior of the UHPFRC moment connections was investigated using 14 precast concrete beam specimens. The precast connections had a narrow joint width ranging from 250 to 100 mm (10 to 4 in.) and included three feasible noncontact splice details: straight bars, 90-degree hooked bars, and U-loop bars. Test results demonstrated the remarkable bonding characteristics of UHPFRC. The precast specimens with a joint width larger than 150 mm (6 in.) exhibited flexural behavior equivalent to that of a monolithic concrete beam specimen. Also, the anchorage provided by the hooked bars and U-loop bars did not appreciably contribute to the bonding strength.
Flexural Behavior of Ultra-High-Performance Fiber-Reinforced Concrete Moment Connection for Precast Concrete Decks
Jun Ki Lee (author) / Seung Hoon Lee
ACI structural journal ; 112
2015
Article (Journal)
English
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