层布式钢纤维无机聚合物轻骨料混凝土的弯拉性能试验研究

Flexural-tensile test on layered steel fiber inorganic polymer lightweight aggregate concrete

通过弯拉试验,分析了无机聚合物轻骨料混凝土及层布式钢纤维无机聚合物轻骨料混凝土的弯拉性能,并使用ABAQUS有限元软件对试验进行了模拟。试验结果显示层布式钢纤维结构可以在较少钢纤维用量的情况下有效提升无机聚合物轻骨料混凝土的弯拉强度和弯曲韧性,单层铺设钢纤维体积率为0.9%、1.2%、1.5%的层布式钢纤维无机聚合物轻骨料混凝土弯拉抗折强度分别提高了35.44%、38.52%、40.03%,双层铺设钢纤维(上层0.9%+下层1.2%)的弯拉抗折强度提高了39.24%。有限元模型可以较精确的计算LSFIPLAC梁的弯拉强度,峰值荷载的计算值与试验结果较为吻合。

The flexural performance of lightweight aggregate concrete and layered steel fiber inorganic polymer lightweight aggregate concrete are analyzed by bending test, and the test was simulated by using ABAQUS finite element software.The test results show that the flexural tensile strength and flexural toughness of the inorganic polymer lightweight aggregate concrete can be effectively improved by the use of a small amount of steel fiber.The steel fiber volume ratio of 0.9%, 1.2% and 1.5% ,respectively,of the steel fiber reinforced inorganic polymer lightweight aggregate concrete flexural tensile strength increased by 35.44%, 38.52% and 40.03%, The flexural tensile strength of double deck steel fiber （upper 0.9%＋lower layer 1.2% ） increased by 39.24%.The finite element model can accurately calculate the bending strength of LSFIPLAC beam, the calculated value of the peak load is in good agreement with the experimental results.