[1]张亚芳,欧成贵,程从密,等.平行双缝倾角变化混凝土圆盘的三维动态研究[J].深圳大学学报理工版,2019,36(No.6(599-724)):599-605.[doi:10.3724/SP.J.1249.2019.06599]
 ZHANG Yafang,OU Chenggui,CHENG Congmi,et al.Three-dimensional dynamic numerical simulation of a Brazilian disc of concrete with variation of dip angle of parallel double slits[J].Journal of Shenzhen University Science and Engineering,2019,36(No.6(599-724)):599-605.[doi:10.3724/SP.J.1249.2019.06599]
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平行双缝倾角变化混凝土圆盘的三维动态研究()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第36卷
期数:
2019年No.6(599-724)
页码:
599-605
栏目:
土木建筑工程
出版日期:
2019-11-20

文章信息/Info

Title:
Three-dimensional dynamic numerical simulation of a Brazilian disc of concrete with variation of dip angle of parallel double slits
文章编号:
201906001
作者:
张亚芳1欧成贵1程从密1刘吉福2
1)广州大学土木工程学院,广东广州 510006;2)广东省交通规划设计研究院股份有限公司,广东广州 510507
Author(s):
ZHANG Yafang1 OU Chenggui1 CHENG Congmi1 and LIU Jifu2
1) Faculty of Civil Engineering, Guangzhou University, Guangzhou 510006, Guangdong Province, P.R.China 2) Guangdong Communication Planning & Design Institute Co. Ltd., Guangzhou 510507, Guangdong Province, P. R. China
关键词:
混凝土数值模拟平台巴西圆盘双缝倾角裂纹扩展声发射
Keywords:
concrete numerical simulation flattened Brazilian disc parallel double slits crack propagation acoustic emission
分类号:
TB333
DOI:
10.3724/SP.J.1249.2019.06599
文献标志码:
A
摘要:
为了研究动荷载下平行双缝倾角变化对混凝土圆盘的影响,基于有限元方法,建立了平台巴西圆盘的三维动态数值模型.采用Weibull统计学理论,考虑混凝土材料的非均匀分布,研究了应力波作用下平行双缝倾角变化对裂纹扩展模式的影响,得到了裂纹萌生、扩展直至贯通的破坏全过程图与声发射图.结果表明,试件的破坏是劈裂性的,新生裂纹扩展的方向与动荷载加载方向一致;声发射活动随预制裂纹倾角增大而减少;双缝预制裂纹倾角越大,峰值荷载越大,声发射累积能量越小,试件越不容易发生破坏.
Abstract:
In this paper, a three-dimensional dynamic numerical model of the flattened Brazilian disc has been established and studied by using finite element method. Non-uniform distribution of concrete materials has been realized in the model by adopting Weibull statistical theory. Effect of variation of dip angle of parallel double slits on crack propagation pattern under stress wave has also been studied. Both complete failure process and acoustic emission diagrams of crack initiation, propagation and penetration have been obtained. The results show that the specimens are splitting failure and the direction of crack growth is consistent with dynamic load, the acoustic emission activity decreases with the increase of the dip angle of prefabricated slits; the bigger the dip angle of prefabricated parallel double slits is, the bigger the peak load is, and the less the accumulated energy of acoustic emission is, which means the specimen is more difficult to be damaged.

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备注/Memo

备注/Memo:
Received:2019-07-08;Accepted:2019-09-15 Foundation:National Natural Science Foundation of China (51678170,51878190) Corresponding author:Professor ZHANG Yafang.E-mail: zhangyafang2004@163.com Citation:ZHANG Yafang,OU Chenggui, CHENG Congmi, et al.Three-dimensional dynamic numerical simulation of a Brazilian disc of concrete with variation of dip angle of parallel double slits[J]. Journal of Shenzhen University Science and Engineering, 2019, 36(6): 599-605.(in Chinese)
更新日期/Last Update: 2019-11-30