Please wait a minute...

Frontiers of Structural and Civil Engineering

Front Arch Civil Eng Chin    2009, Vol. 3 Issue (2) : 131-136     https://doi.org/10.1007/s11709-009-0027-0
RESEARCH ARTICLE
Behavior of steel fiber–reinforced high-strength concrete at medium strain rate
Chujie JIAO1(), Wei SUN2, Shi HUAN3, Guoping JIANG3
1. School of Civil engineering, Guangzhou University, Guangzhou 510006, China; 2. School of Materials Science and Engineering, Southeast University, Nanjing 211189, China; 3. Earthquake Engineering Research Test Center, Guangzhou University, Guangzhou 510405, China
Download: PDF(198 KB)   HTML
Export: BibTeX | EndNote | Reference Manager | ProCite | RefWorks
Abstract

Impact compression experiments for the steel fiber–reinforced high-strength concrete (SFRHSC) at medium strain rate were conducted using the split Hopkinson press bar (SHPB) testing method. The volume fractions of steel fibers of SFRHSC were between 0 and 3%. The experimental results showed that, when the strain rate increased from threshold value to 90 s-1, the maximum stress of SFRHSC increased about 30%, the elastic modulus of SFRHSC increased about 50%, and the increase in the peak strain of SFRHSC was 2-3 times of that in the matrix specimen. The strength and toughness of the matrix were improved remarkably because of the superposition effect of the aggregate high-strength matrix and steel fiber high-strength matrix. As a result, under impact loading, cracks developed in the SFRHSC specimen, but the overall shape of the specimen remained virtually unchanged. However, under similar impact loading, the matrix specimens were almost broken into small pieces.

Keywords steel fiber–reinforced high-strength concrete (SFRHSC)      high strain rates      split Hopkinson press bar (SHPB)      strain rate hardening effects     
Corresponding Author(s): JIAO Chujie,Email:jiaochujie@sina.com   
Issue Date: 05 June 2009
 Cite this article:   
Chujie JIAO,Wei SUN,Shi HUAN, et al. Behavior of steel fiber–reinforced high-strength concrete at medium strain rate[J]. Front Arch Civil Eng Chin, 2009, 3(2): 131-136.
 URL:  
http://journal.hep.com.cn/fsce/EN/10.1007/s11709-009-0027-0
http://journal.hep.com.cn/fsce/EN/Y2009/V3/I2/131
Service
E-mail this article
E-mail Alert
RSS
Articles by authors
Chujie JIAO
Wei SUN
Shi HUAN
Guoping JIANG
C100V0C100V2C100V3
water-binder ratio0.240.240.24
portland cement /(kg/m3)425435440
fly ash /(kg/m3)434444
silica fume /(kg/m3)646667
steel fiber /(kg/m3)0156234
fine aggregate /(kg/m3)616807880
coarse aggregate /(kg/m3)1252988879
water-reducing admixture /(kg/m3)9.9210.1910.31
water /(kg/m3)128132134
static compressive strength in 28 days /MPa118.2138.2154.3
Tab.1  Mixture proportions and strengths
Fig.1  Cross sections of specimens before experiment. (a) C100V; (b) C100V; (c) C100V
Fig.2  Schematic of SHPB
Fig.3  Stress-strain curves of three series of concrete. (a) C100V; (b) C100V; (c) C100V
Fig.4  Three series of concrete specimens after failure at a strain rate of about 70 s. (a) C100V; (b) C100V; (c) C100V
strain rate/ s-1compressive strength/MPapeak strain/×10-3
C100V01590.62.220
1791.32.446
42116.32.914
50128.63.021
55130.83.026
64138.13.042
76143.53.089
93153.83.108
C100V21489.71.995
1591.42.154
41139.03.078
48149.53.101
59158.73.250
70168.53.266
80173.13.598
95183.03.624
C100V31491.62.256
1892.92.260
41155.13.311
52171.43.434
63184.63.541
71190.93.736
83199.53.814
90203.23.823
Tab.2  Dynamical mechanic performance of three series of concrete
Fig.5  Strength-strain rate relation of three series of concrete
Fig.6  Area enclosed by stress-strain curves of three series of concrete
1 Gopalaratnam V S, Shah S P, John R. A modified instrumented Charpy test for cement-based composites. Experimental Mechanics , 1984, 24(2): 102-111
doi: 10.1007/BF02324991
2 Watstein D. Effect of straining rate on the compressive strength and elastic properties of concrete. Journal of American Concrete Institute , 1953, 24(8): 729-744
3 Green H. Impact strength of concrete. In: ICE Proceedings . London: Thomas Telford, 1964, 28: 383-396
4 Atchley B L, Furr H L. Strength and energy absorption properties of plain concrete under dynamic and static loading. ACI Materials Journal , 1967, 64(8): 745-756
5 Mainstone R J. Properties of materials at high rates of straining or loading. Materials and Structures , 1975, 44(8): 102-116
6 Hughes B P, Watson A J. Compressive strength and ultimate strain of concrete under impact loading. Magazine of Concrete Research , 1978, 30(105): 189-199
7 Kolsky H. An investigation of the mechanical properties of materials at very high rates of loading. In: Proceedings of the Physical Society , 1949, B62: 676-700
8 Hopkinson B. Amethod of measuring the pressure in the deformation of high explosives or by the impact of bullets. Philosophical Transactions of Royal Society London , 1914, A213: 437-452
9 Davies R M. A critical study of the Hopkinson pressure bar. Philosophical Transactions of Royal Society London , 1948, A240: 375-457
10 Malvern L E, Jenkins D A, Tang T, Ross C A. Dynamic compressive testing of concrete. In: Proceedings of Second Symposium on the Interaction of Non-nuclear Munitions with Structures . Florida: U.S. Department of Defense, 1982, 194-199
11 Ross C A, Thompson P Y, Tedesco J W. Split-Hopkinson press-bar test on concrete and mortar in tension and compress. Journal of ACI Material , 1989, 86(5): 475-481
12 Gerard Gary, Patrice Bailly. Behavior of quasi-brittle Material at high strain rate. Experiment and modeling, European Journal of Mechanics, A/Solids , 1998, 17(3): 403-420
doi: 10.1016/S0997-7538(98)80052-1
13 Han Zhao. Analysis of high strain rate dynamic tests on concrete. In: The 5th International Symposium on Cement and Concrete . Shanghai: Tongji Unversity Press, 2002, 583-589
14 Lindholm U S. Some experiments with the split Hopkinson pressure bar. Journal of Mechanical Physics Solids , 1964, 12: 317-335
doi: 10.1016/0022-5096(64)90028-6
15 Brace W F, Joncs A H. Comparison of uniaxial deformation in shock and static loading of three rocks. Geophysical Research , 1971, 76(20): 4913-4921
doi: 10.1029/JB076i020p04913
16 Janach W. The role of bulking in brittle failure of rocks under rapid compression. International Journal of Rock Mechanical and Mining Science , 1976, 13(6): 177-186
doi: 10.1016/0148-9062(76)91284-5
17 Glenn L A, Janach W. Failure of granite cylinders under impact loading. International Journal of Fracture , 1977, 13: 301-317
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed