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%;

研究證明：底層撒布較長鋼纖維的聚丙烯腈纖維混凝土梁的彎曲疲勞強度比素混凝土提高15.7%；