使用废弃纤维再生混凝土梁抗裂性能有限元分析

Finite element analysis of anti-cracking performance of waste fiber reinforced concrete beams

通过ANSYS有限元模拟分析,研究不同组合混杂聚丙烯腈及废弃丙纶纤维对再生混凝土梁抗裂性能的影响。研究结果表明:不同组合聚丙烯腈及废弃纤维的掺入,能够提高再生混凝土梁初始开裂时的跨中弯矩及应力,其中A75B25组试件中,混杂纤维有效地提高再生混凝土梁韧性,继而延缓混凝土开裂,提高梁试件初始开裂荷载;在屈服状态时随着聚丙烯腈及废弃纤维组合的变化,跨中挠度有降低效应。

In this paper,the influence of different combinations of polyacrylonitrile and waste polypropylene fiber on the cracking resistance of recycled concrete beams was studied by ANSYS finite element simulation. The results show that the incorporation of different combinations of polyacrylonitrile and waste fiber can improve the mid-span moment and stress in the initial cracking of recycled concrete beams. In the A75 B25 specimen,the hybrid fibers can effectively improve the toughness of recycled concrete beams. Delaying the cracking of concrete and improving the initial cracking load of the beam specimen. In the yield state,with the change of the combination of polyacrylonitrile and waste fiber,there were reducing effects on the mid-span deflection.