给出混凝土梁试样静态和疲劳弯曲损伤度试验分析计算式。
Analysis of test results of concrete beams which are subject to static and fatigue load is formulated.
研究证明：底层撒布较长钢纤维的聚丙烯腈纤维混凝土梁的弯曲疲劳强度比素混凝土提高15.7％；
The test results show that, the flexural fatigue strength of polyacrylonitrile fiber reinforced concrete beams with bottom layer steel fiber is larger than the plain concrete 15.7% ;
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