废弃纤维再生混凝土梁抗弯性能研究

周静海; 林东野; 康天蓓; 刘昱

doi:10.13204/j.gyjzG20060810

废弃纤维再生混凝土梁抗弯性能研究

doi: 10.13204/j.gyjzG20060810

沈阳建筑大学土木工程学院, 沈阳 110168

基金项目:

国家自然科学基金（51678374）；2019年度辽宁省高等学校创新团队（LT2019011）。

详细信息

作者简介:
周静海,男,1965年出生,博士,教授,博士生导师。电子信箱:jinghaiz@qq.com

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出版历程
- 收稿日期: 2020-06-08
- 网络出版日期: 2021-09-16
- 刊出日期: 2021-09-16

STUDY ON FLEXURAL BEHAVIOR OF WASTE FIBER RECYCLED CONCRETE BEAMS

College of Civil Engineering, Shenyang Jianzhu University, Shenyang 110168, China

摘要

摘要: 对再生骨料取代率分别为0%、50%、100%，废弃纤维体积掺入量分别为0%、0.08%、0.12%、0.16%的梁构件进行静力加载试验，研究了废弃纤维再生混凝土梁的抗弯性能。采用ABAQUS有限元分析软件，建立了废弃纤维再生混凝土抗弯构件的数值模型，并与试验结果进行对比分析。研究表明：随着再生骨料取代率的增加，钢筋混凝土梁的极限承载力降低；掺入的废弃纤维在细观尺度上体现为纤维的桥接作用限制了裂缝在水泥基体中的发展，在宏观尺度上表现为改善了再生混凝土梁构件的抗弯性能；当废弃纤维体积掺入量为0.12%时，再生骨料取代率为50%的梁构件的极限承载力提高了0.4%；再生混凝土梁的有限元分析模型具有较高的精度，其计算值与试验值基本一致。
- 再生骨料 /
- 废弃纤维 /
- 抗弯性能 /
- 有限元分析
Abstract: To study the flexural behavior of waste fiber recycled concrete beams, the static loading test of beams were carried out with the replacement rate of recycled aggregates for 0, 50%, 100%, and the volume of waste fiber blending with 0, 0.08%, 0.12%, and 0.16%. At the same time, a calculation model of reinforced concrete beams was set up based on the finite element software ABAQUS, compared with the test results. The results showed that with the increase of the replacement rate of recycled aggregates, the ultimate bearing capacity of concrete beams decreased. At the meso-level, the waste fiber was the bridge function of fibers, which limited the development of cracks in cement matrix. At the macro level, it improved the flexural behavior of recycled concrete beams. Furthermore, when the replacement rate of recycled aggregates was 50% and the fiber content was 0.12%, the ultimate bearing capacity of waste fiber recycled concrete beams was increased by 0.4%, the calculated values of the finite element model were relatively consistent with the experimental values.
- recycled aggregates /
- waste fibers /
- flexural behavior /
- finite element analysis

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参考文献(21)

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