[1]张亚芳,罗斐化,刘浩,等.动荷载下间距对混凝土双丝拉拔性能的影响[J].深圳大学学报理工版,2018,35(No.5(441-550)):453-459.[doi:10.3724/SP.J.1249.2018.05453]
 ZHANG Yafang,LUO Feihua,LIU Hao,et al.Influence of spacing on twin fibers pull-out test of concrete matrix under dynamic load[J].Journal of Shenzhen University Science and Engineering,2018,35(No.5(441-550)):453-459.[doi:10.3724/SP.J.1249.2018.05453]
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动荷载下间距对混凝土双丝拉拔性能的影响()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第35卷
期数:
2018年No.5(441-550)
页码:
453-459
栏目:
土木建筑工程
出版日期:
2018-09-25

文章信息/Info

Title:
Influence of spacing on twin fibers pull-out test of concrete matrix under dynamic load
作者:
张亚芳1罗斐化1刘浩12张新建1陈忠平1
1)广州大学土木工程学院,广东广州 510006;2)深圳市市政设计研究院有限公司,广东深圳 518029
Author(s):
ZHANG Yafang1 LUO Feihua1 LIU Hao12 ZHANG Xinjian1 and CHENG Zhongping1
1) Faculty of Civil Engineering, Guangzhou University, Guangzhou 510006, Guangdong Province, P.R.China 2) Shenzhen Municipal Design & Research Institute Co. Ltd., Shenzhen 518029, Guangdong Province, P.R.China
关键词:
混凝土动荷载双丝拉拔间距非均匀性数值模拟
Keywords:
concrete dynamic load twin fibers pull-out test fiber spacing heterogeneity numerical simulation
分类号:
TB 333
DOI:
10.3724/SP.J.1249.2018.05453
文献标志码:
A
摘要:
研究了动荷载作用下双丝间距改变对拉拔试样破坏模式及其力学性能的影响. 基于材料的非均匀性建立了双丝拉拔混凝土动态数值模型,从细观力学角度出发,模拟了试样从微裂纹萌生、扩展直至裂纹贯通的全过程,获得了试样的界面剪应力分布曲线、荷载-位移曲线、峰值荷载-双丝间距-相对韧度曲线图等,深入探讨了动力荷载下双丝拉拔混凝土的破坏模式、界面力学行为及增强、增韧机理. 结果表明:双丝间距影响试样的破坏模式,峰值荷载及相对韧度随双丝间距的增加呈现先升后降的趋势.
Abstract:
Influence of fiber spacing on failure pattern and mechanical properties of twin fibers pull-out specimens under dynamic load have been studied in this paper. Dynamic numerical model of twin fibers pull-out test of concrete matrix has been created based on material heterogeneity. From viewpoint of meso-scale, complete failure process from micro-cracks initiation to instability failure has been simulated. Curves of interfacial shear stress distribution, load-displacement and peak load & relative toughness vs. fiber spacing are investigated in details. Failure pattern, interfacial mechanical performance, strengthening and toughening mechanism of twin fibers pull-out of concrete matrix under dynamic load have also been scrutinized. Results show that fiber spacing has great effect on failure pattern of specimens. Furthermore, both peak load and relative toughness show a tendency of rising first and then decreasing along with increase of the fiber spacing.

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更新日期/Last Update: 2018-08-21