玻璃纤维管钢筋混凝土空心柱轴压徐变性能研究
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作者单位:

1.辽宁工程技术大学 土木工程学院;2.东北大学 资源与土木工程学院

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中图分类号:

TU398

基金项目:

辽宁省自然科学基金(201705403030);辽宁省教育厅基础项目(LJ2019JL018)


Creep behavior of glass fiber reinforced polymer tube filled with reinforced hollow concrete columns on axial compression
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Affiliation:

1.School of Civil Engineering,Liaoning Technical University;2.School of Resourced of Civil Engineering,Northeastern University

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    摘要:

    为研究玻璃纤维管钢筋混凝土空心柱轴心受压徐变性能的影响,本文根据该空心柱在轴压下的受力特点,对空心柱的受力性能进行分析,建立适用于玻璃纤维管钢筋混凝土空心柱轴压徐变公式。编制徐变分析程序计算徐变应变与时间关系曲线,并通过已有试验验证徐变程序的正确性。在此基础上,计算分析作用荷载、玻璃纤维管管壁厚度、混凝土强度等级及空心率等主要设计参数对其徐变性能的影响。结果表明:在荷载作用初期(28天内),空心柱的徐变增长较快,28天后增长速度相对缓慢,大约6个月后趋于稳定。对玻璃纤维管钢筋混凝土空心柱轴压徐变影响最大的是作用荷载,其次是玻璃纤维管管壁厚度,混凝土强度等级和空心率对徐变影响相对较小,该结论可为工程实践提供参考。

    Abstract:

    In order to study the influence of creep behavior of glass fiber reinforced concrete hollow columns under axial compression, the mechanical properties of the hollow were analyzed according to the mechanical characteristics of the hollow column under axial compression in this paper. The creep formula of the GFRP tube reinforced concrete hollow column was established under axial compression.A creep analysis program was developed to calculate the creep strain-time relationship curve. And the correctness of creep program was verified by existing tests. On this basis, the influence of the main design parameters,such as action load, thickness of GFRP tube wall, strength grade of concrete and hollow ratio on creepperformance was calculated and analyzed. The results showed that creep of hollow columns increased rapidly in the early stage(28 days) of load action, and the growth rate was relatively slow after 28 days, and tended to be stable after about 6 months. The biggest influence on creep of GFRP tube reinforced concrete hollow columns under axial compression was action,followed by the thickness of GFRP tube wall. The influence of concrete strength grade and hollow ratio was relatively small.The conclusion can provide reference for engineering practice.

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  • 收稿日期:2020-05-26
  • 最后修改日期:2020-07-24
  • 录用日期:2020-08-16
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