A Comparative Study on Flexural Toughness of Steel Fiber Reinforced Concrete

강섬유 보강 콘크리트의 휨파괴 인성지수의 결정에 관한 비교 연구

This paper reviewed various methods of evaluating the toughness of fiber reinforced concrete materials by means of toughness indices and discussed the use of various multiples of first-crack deflection or first-crack secant compliance to define toughness indices. And a new method what is called effective toughness used to evaluate the toughness of steel fiber reinforced concrete. The proposed method determinded from the area below the load-deflection curve until deflection at the loading point becoms 1/150 of the span devided by the ligament area.