不同纤维对GFRP格栅混凝土力学性能

发布时间：2018-04-05 03:09

本文选题：GFRP格栅混凝土　切入点：聚烯烃纤维　出处：《土木工程与管理学报》2017年02期

【摘要】：由于现有混凝土抗拉强度较低和GFRP格栅刚度较小,将GFRP与混凝土进行复合不能充分发挥两种材料的力学性能。在混凝土中添加纤维不仅可以提高混凝土的拉伸强度还可以提高其刚度,从而更好地发挥复合材料格栅的力学性能。为了研究钢纤维和聚烯烃纤维对复合材料格栅力学性能的影响,首先制备了纯GFRP格栅梁、钢纤维格栅梁以及聚烯烃纤维格栅梁,然后通过弯曲实验对试件的力学性能进行了研究,最后通过实验数据和现象对不同纤维对GFRP格栅混凝土力学性能进行研究,结果表明:聚烯烃纤维增强GFRP格栅混凝土承载力和刚度最高,钢纤维纤维增强GFRP格栅混凝土承载力和刚度较低,纯GFRP格栅混凝土承载力和刚度最低。掺入纤维可以阻止裂缝的发展,1%聚烯烃纤维的效果要比混合1.1%钢纤维的效果好。
[Abstract]:Due to the low tensile strength of concrete and the small stiffness of GFRP grille, the composite of GFRP and concrete can not give full play to the mechanical properties of the two materials.Adding fiber to concrete can not only increase the tensile strength of concrete, but also improve its stiffness, thus exerting the mechanical properties of composite grille better.In order to study the effect of steel fiber and polyolefin fiber on the mechanical properties of composite grille, pure GFRP grid beam, steel fiber grid beam and polyolefin fiber grid beam were prepared.Then the mechanical properties of GFRP grille concrete were studied by bending test. Finally, the mechanical properties of GFRP grille concrete were studied by experimental data and phenomena.The results show that the bearing capacity and stiffness of polyolefin fiber reinforced GFRP grille concrete is the highest, that of steel fiber reinforced GFRP grille concrete is lower, and that of pure GFRP grille concrete is the lowest.The effect of 1% polyolefin fiber is better than that of mixed 1.1% steel fiber.
【作者单位】：解放军后勤工程学院工程管理系;
【分类号】：TU528.57

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