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http://dx.doi.org/10.4334/JKCI.2005.17.3.445

Flexural Behavior of Prestressed Dual Concrete Beams  

Park Tae-Hyo (Dept. of Civil Engineering, Hanyang University)
Yun Sung-Hwan (Dept. of Civil Engineering, Hanyang University)
Yun Hee-Dae (Dept. of Civil Engineering, Hanyang University)
Publication Information
Journal of the Korea Concrete Institute / v.17, no.3, 2005 , pp. 445-454 More about this Journal
Abstract
Cracks due to low tensile strength in prestressed concrete (PC) beams may decrease rigidity and structural performance, resulting in excessive deflection. In an effort to solve this problem, in this research, prestressed dual concrete (PDC) has been proposed, consisting of normal strength concrete in compression zone, and high performance steel fiber reinforced concrete(HPSFRC) with a partial depth in tensile zone. Three PDC beams with different depths of HPSFRC and two PC beams were cast for experiments. Analytical models at each stage, i.e., precracking, postcracking, and ultimate, were proposed for analysis of flexural behavior in PDC beams. The experimental results agree well to the analytical ones. Crack formation and its propagation are controlled by the HPSFRC in PDC beams. The initial cracking and service limit loads are increased along with the load carrying capacity and flexural stiffness.
Keywords
high performance steel fiber reinforced concrete; prestressed dual concrete beams; analysis of flexural behavior;
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