邓宗才
    (山东建材学院 济南 250022)

[提要]  研究了素混凝土和钢纤维混凝土在轴压疲劳荷载下的破坏机理。通过试验研究了钢纤维品种、纤维掺量、加载应力水平对疲劳寿命及能量吸收的影响规律；探讨了疲劳累积损伤的特性。研究表明：在较低的应力水平下，钢纤维混凝土的疲劳寿命、能量吸收值均比高应力水平时明显增大。
[关键词]  钢纤维混凝土 疲劳 损伤

Results of an experimental investigation of the behavior of steel fiber reinforced concrete under cyclic compressive loadin are presented. The parameters ofriber type, fiber volume and the tress-strength ratio are all studied. The main emphasis is placed on the fatigue life, energy absorption and damae accumulat:ion. Fibers up t0 2 percent have considerable beneficial effect on the fatigue behavior of concrete.Fibers dissipate much more additional energy at lower stress levels than at higher stress levels.
Keywords: steel fiber reinforced concrete;fatigue; damage