篐筋能有效提高其破坏荷载，但对初裂荷载提高不明显。
The presence of hoop steel can effectively improve damage load of joint, but for the early cracked load is not obvious .
测定了在不同纤维掺量下混凝土梁的初裂冲击次数、破坏冲击次数以及冲击能。
The initial-crack, fracture impact cycle number and impact energy of these concrete beams with different fiber dosages are also tested.
不仅推出了初裂强度、极限强度的计算公式，而且还给出了钢纤维混凝土的损伤本构方程。
The calculation formulae of initial crack and limit strength are derived. The foundation equation of harm mechanics of steel fiber concrete is given here.
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