Test analysis on spiral steel fiber reinforced concrete subjected to impact loads

被引：3

作者：

Hao Y. ^{[1
,2
]}

Hao H. ^{[1
,2
]}

机构：

[1] School of Civil and Mechanical Engineering, Curtin University, Bentley, 6102, WA

[2] Tianjin University and Curtin University Joint Research Center of Structural Monitoring and Protection, Tianjin

来源：

Tianjin Daxue Xuebao (Ziran Kexue yu Gongcheng Jishu Ban)/Journal of Tianjin University Science and Technology | 2016年 / 49卷 / 04期

关键词：

Blast and impact resistance; Concrete; High strain rate; Spiral steel fiber;

D O I：

10.11784/tdxbz201403084

中图分类号：

学科分类号：

摘要：

Many studies have demonstrated that adding steel fibers to concrete mixture is able to markedly increase the ductility and tensile strength and thus enhance the resistance of concrete structures against blast and impact loads. However, it is noticeable that in current construction industry, the popularly used steel fibers are mainly straight fibers or hooked-end fibers that are only able to provide bonding to concrete matrix in a 2D plane. Because concretes using these fibers are vulnerable to fiber debonding, the effectiveness of using these steel fibers to improve the blast or impact load resistance is strongly limited. The present study proposes spiral steel fibers to reinforce concrete material and carries out both split Hopkinson pressure bar (SHPB) tests to investigate the material properties under high-speed compression and split tension and drop-weight tests to study the behavior of spiral fiber reinforced concrete beams under centre-point impact loads. The test results show that compared with conventional steel fibers, the crack controllability, residual strength and strain rate sensitivity can be greatly enhanced by spiral steel fibers. The significant contribution of spiral steel fibers to the improvement of protective structures against blast and impact loads is demonstrated. © 2016, Editorial Board of Journal of Tianjin University(Science and Technology). All right reserved.

引用

页码：355 / 360

页数：5

共 13 条

[1]

Brandt A.M., Fiber reinforced cement-based (FRC) composites after over 40 years of development in building and civil engineering, Composite Structures, 86, pp. 3-9, (2008)

[2]

Romualdi J.P., Batson G.B., Mechanics of crack arrest in concrete, Journal of the Engineering Mechanics Division, ASCE, 89, EM3, pp. 147-168, (1963)

[3]

Dou G., Du X., Li L., Experiment on behavior of reinforced concrete beams with steel fiber under impact load, Journal of Tianjin University: Science and Technology, 48, 10, pp. 864-872, (2015)

[4]

Lok T.S., Zhao P.J., Impact response of steel fiberreinforced concrete using a split Hopkinson pressure bar, Journal of Materials in Civil Engineering, ASCE, 16, 1, pp. 54-59, (2004)

[5]

Gao J., Sun W., Morina K., Mechanical properties of steel fiber-reinforced, high-strength, lightweight concrete, Cement and Concrete Composites, 19, pp. 307-313, (1997)

[6]

Kim D.J., El-Tawil S., Naaman A.E., Rate-dependent tensile behavior of high performance fiber reinforced cementitious composites, Materials and Structures, 42, pp. 399-414, (2009)

[7]

Ravindrarajah R.S., Tam C.T., Flexural strength of steel fiber reinforced concrete beams, International Journal of Cement Composites and Lightweight Concrete, 6, 4, pp. 273-278, (1984)

[8]

ASTM International. Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens 2006

[9]

Tang T., Effects of load-distributed width on split tension of unnotched and notched cylindrical specimens, Journal of Testing and Evaluation, 22, 5, pp. 401-409, (1994)

[10]

Lindholm U.S., Some experiments with the split Hopkinson pressure bar, Journal of the Mechanics and Physics of Solids, 12, pp. 317-335, (1964)

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