Fiber Reinforced Concrete (Structural aspect)

[2129] FIBER BRIDGING EFFECT ON SHEAR BEHAVIOR OF UFC WITH NORMAL CONFINEMENTS

Chikako FUJIYAMA¹, Kyoichi TOKUTAKE², Yusuke NAGAI³, Yuya TSUJI⁴ (1.横浜国立大学 2.清水建設 3.鹿島建設 4.阪神高速道路)

Keywords:UFC、Shear capacity of pre-stressed member、fiber bridging effect、apparent contact angle

The Ultra-high strength Fiber Reinforced Concrete (UFC) subjected to pure shear had been investigated for the specimens with / without steel fibers. The shear capacities were dominated by the confinement stress 0MPa, 5MPa, 10MPa and 15MPa and they were plotted close to the Mohr-Coulomb’s failure criterion. The relationship between normal strain to shear strain was classified by existence of fibers rather than confinement stress. The difference of apparent contact angle, assuming equivalent crack opening and equivalent shear slip, for with / without fiber was determined as the fiber bridging effect.