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http://dx.doi.org/10.14190/JRCR.2017.5.3.282

Ductile Behavior of Ultra High Performance Fiber Reinforced Concrete Segmental Box Girder  

Jeong, Min-Seon (C.R.D Ltd)
Park, Sung-Yong (Korea Institute of Civil Engineering and Building Technology)
Han, Sang-Mook (Department of Civil Engineering, Kumoh National Institute of Technology)
Publication Information
Journal of the Korean Recycled Construction Resources Institute / v.5, no.3, 2017 , pp. 282-289 More about this Journal
Abstract
The flexural behavior tests of UHPC segmental Box girder which has 160MPa compressive strength and 15.4m length were carried out. The test variables are area of prestressing wires, volume fraction of steel fibers and longitudinal reinforcing bars in upper flange and web. PS tendons which has 32 strands of 15.2mm diameter in lower flange, 24 strands and 14 strands in lower flange were arranged and volume fraction of 2%, 1.5% and 1.0% is used in box girder concrete. UHPFRC box girder which has 32 strands in lower flange showed the over reinforcement and brittle behavior. UHPFRC box girder which has 24 strands showed the similar peak load as 32 strands girder and ductile behavior as large deflection. UHPFRC box girder which has 14 strands showed half of the peak load of 24 strands box girder and ductile behavior. After the application of the formular for the reinforcement index to the behavior of the UHPFRC box girders, reinforcement index does not determine the characteristic of behavior of UHPFRC box girder exactly. So the index should consider the dimension precisely and modify the reference value corresponding to the 0.005 strain of the prestressing strands.
Keywords
Ultra-high performance concrete; Steel fiber; Ductile behavior; Box girder; Reinforcement Index;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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