[1]李晓琴,陈前均,陈保淇,等.混凝土SHPB试验端面摩擦效应研究[J].西安建筑科技大学学报(自然科学版),2018,50(02):209-213，241.[doi:10.15986/j.1006-7930.2018.05.009]
　LI Xiaoqin CHEN Qianjun CHEN Baoqi TAO Yi.Study on concrete SHPB tests with interface friction effects[J].J. Xi’an Univ. of Arch. & Tech.(Natural Science Edition),2018,50(02):209-213，241.[doi:10.15986/j.1006-7930.2018.05.009]
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混凝土SHPB试验端面摩擦效应研究()
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西安建筑科技大学学报（自然科学版）[ISSN:1006-7930/CN:61-1295/TU]

卷:
50
期数:
2018年02期
页码:
209-213，241
栏目:
出版日期:
2018-05-28

文章信息/Info

Title:
Study on concrete SHPB tests with interface friction effects
文章编号:
1006-7930(2018)02-0206-05
作者:
李晓琴1; 2; 陈前均1; 陈保淇1; 陶毅3
(1.昆明理工大学 建筑工程学院,云南 昆明 650000;2.上海市工程结构安全重点实验室,上海 200000;3.西安建筑科技大学 土木工程学院,陕西 西安 710055)
Author(s):
LI Xiaoqin 1; 2CHEN Qianjun 1CHEN Baoqi 1TAO Yi 3
(1.Faculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming 650000, China 2.Shanghai Key Laboratory of Engineering Structure Safety , Shanghai 200000, China 3.School of Civil Engineering , Xi’an Univ. of Arch. Tech. , Xi’an 710055, China)
关键词:
SHPB; 应变率; 混凝土; 摩擦因数; DIF
Keywords:
SHPB;  strain rate;  concrete;  friction coefficient;  DIF
分类号:
TU528，571
DOI:
10.15986/j.1006-7930.2018.05.009
文献标志码:
A
摘要:
分离式霍普金森压杆(split Hopkinson pressure bar，简称SHPB)试验是测量材料在高应变率下动态特性的常用试验方法。基于LS-DYNA对混凝土的SHPB试验进行数值模拟，其中混凝土采用K&C模型，利用SHPB二波法理论重构了抗压状态下混凝土试件的应力应变曲线，通过对比模拟结果和试验结论，分析了混凝土试件在动态荷载作用下的破坏规律，并通过设置不同的混凝土与SHPB杆件界面摩擦因数μ，将界面摩擦效应对混凝土动态抗压强度的影响进行了量化分析。研究结果表明：随着应变率的上升混凝土动态抗压强度增加且混凝土损伤演化更充分，动力增强因子(dynamic increasing factor，简称DIF)随着μ的增加而增加，但当μ每增加0.1时，DIF的增加幅度将会下降5%左右，且端面摩擦效应对DIF影响的最大值约为60%。
Abstract:
Split Hopkinson pressure bar(SHPB) tests are the most popular experimental techniques used for dynamic characterization of various materials under high strain rates. A series of SHPB numerical tests were done based on LS-DYNA , and K&C local concrete damage model is used for modelling concrete. The stress-strain curves of the concrete specimens are reconstructed with two-wave theory . The failure rules of concrete specimen under dynamic load are analyzed by comparing the simulation results and the test results. Furthermore, the effect of interface friction on the dynamic strength of the concrete was analyzed based on different SHPB interface friction coefficients. The results show that with the increase of strain rate, the dynamic compressive strength of concrete increases and the damage evolution of concrete is more sufficient. As the friction coefficient rise, the dynamic increasing factor(DIF) increases. While the friction coefficient increases by 0.1, there is about 5% decrease in DIF increments. Considering the effect of interface friction on DIF, the increment of DIF is about 60% mostly

参考文献/References:


[1]李晓琴,陈建飞,陆勇,等基于局部损伤混凝土模型的FRP混凝土界面有限元分析研究[J]西安建筑科技大学学报(自然科学版),2015,47(1):6265.
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[2]BISCHOFF P H, PREEY S H Compressive behaviour of concrete at high strain rates[J] Materials and Structures, 1991, 24(6): 425450.
[3]ZHANG M, WU H J, LI Q M, et al Further investigation on the dynamic compressive strength enhancement of concrete like materials based on split Hopkinson pressure bar tests Part I: Experiments[J] International Journal of Impact Engineering, 2009, 36(12): 13271334.
[4]ROSSI P, VAN MIER J G M, TOUTLEMONDE F, et al Effect of loading rate on the strength of concrete subjected to uniaxial tension[J] Materials and Structures, 1994, 27(5): 260264.
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相似文献/References:

[1]翟 越,李 楠,赵均海,等.SHPB试验中应力波在损伤非线弹性材料中的传播[J].西安建筑科技大学学报(自然科学版),2015,47(03):359.[doi:10.15986/j.1006-7930.2015.03.009]
　ZHAI Yue,LI Nan,ZHAO Junhai,et al.Stress wave propagation in damage nonlinear elastic rock materials specimen during SHPB tests[J].J. Xi’an Univ. of Arch. & Tech.(Natural Science Edition),2015,47(02):359.[doi:10.15986/j.1006-7930.2015.03.009]

备注/Memo

备注/Memo:

收稿日期:2016-09-05    修改稿日期:2018-03-24
基金项目:国家青年自然科学基金项目(NSFC51408478)；教育部留学回国人员科研启动基金项目(教外司留[20131792]号文件)；上海市工程结构安全重点实验室开放课题基金资助(2015KF05)
第一作者:李晓琴(1983－)，女，副教授，主要从事FRP、混凝土结构抗爆炸和冲击等方面的研究. E-mail：Xiaoqin-Li@foxmail,com
更新日期/Last Update: 2018-05-28