PE-ECC梁抗冻融性能试验研究与有限元分析
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

基金项目:

国家自然科学基金(51708479)


Experimental study and finite elementanalysis on freeze-thaw resistance of PE-ECC beams
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    为研究聚乙烯超高韧性水泥基复合材料梁的抗冻融性能,参照西北地区冬季近10年1月份平均最低温度,对15根PE-ECC梁进行了冻融试验。对冻融后的PE-ECC梁的受弯性能进行了分析;采用基于热传导理论的有限元程序USDFLD对PE-ECC梁进行了冻融循环与荷载耦合作用下的分析,同时与PE-ECC梁的冻融试验结果进行了对比与分析。结果表明,冻融200次后的PE-ECC梁的质量损失率为1.12%,相对动弹性模量高达93.4%,且冻融100次后的PE-ECC梁的极限弯矩约是PVA-ECC梁的1.19倍,是同等级抗压强度普通混凝土梁的1.62倍;ABAQUS子程序USDFLD可以较准确地计算PE-ECC梁在冻融循环作用下的破坏应力、承载力等,得到的PE-ECC梁抗冻融性能与试验结果吻合较好。采用USDFLD程序模拟PE-ECC梁的抗冻融循环性能具有可行性,可为研究荷载作用下的ECC构件的抗冻融循环性能提供一定的参考。

    Abstract:

    In order to study the freeze-thaw resistance of polyethylene engineered cementitious composite (PE-ECC) beams,15 PE-ECC beams were tested with reference to the average lowest temperature in January of recent ten years in winter in Northwest China.The bending properties of PE-ECC beams after freezing and thawing were analyzed.At the same time,the finite element program USDFLD based on heat conduction theory was used to analyze the PE-ECC beam under the coupling action of freeze-thaw cycle and load,and the results were compared and analyzed with the freeze-thaw test results of PE-ECC beam.The results show that the mass loss rate of PE-ECC beam after freezing and thawing for 200 times is 1.12%,the relative dynamic elastic modulus is as high as 93.4%,and the ultimate moment of PE-ECC beam after freezing and thawing for 100 times is about 1.19 times that of PVA-ECC beam and 1.62 times that of ordinary concrete beam with the same compressive strength.ABAQUS subroutine USDFLD can accurately calculate the failure stress and bearing capacity of PE-ECC beams under freeze-thaw cycles.The freeze-thaw resistance of PE-ECC beam is in good agreement with the experimental results.It is possible to use the program USDFLD for simulating the freeze-thaw resistance of PE-ECC beams,which provides some reference for the study of the freeze-thaw cycle resistance of ECC members under loads.

    参考文献
    相似文献
    引证文献
引用本文

韩风霞,郭 鑫,刘 清. PE-ECC梁抗冻融性能试验研究与有限元分析[J].河北科技大学学报,2022,43(3):221-230

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2022-01-24
  • 最后修改日期:2022-05-07
  • 录用日期:
  • 在线发布日期: 2022-07-08
  • 出版日期: