钢纤维混凝土动态劈裂实验研究

兵工学报 ›› 2010, Vol. 31 ›› Issue (4): 469-472.

钢纤维混凝土动态劈裂实验研究

焦楚杰₁，蒋国平₂，高乐₁

（1.广州大学土木工程学院，广东广州 510006；2.广州大学工程抗震中心，广东广州 510405）

收稿日期:2009-07-28 修回日期:2009-07-28 上线日期:2014-05-04
通讯作者: 焦楚杰₁ E-mail:jiaochujie@sina.com
作者简介:焦楚杰(1974—)，男，教授，博士，硕士研究生导师
基金资助:
国家自然科学基金项目(50708022)；广东省自然科学基金项目（06301038）；建设部科研开发项目（06-K1-37、07-K4-5、07-K4-13）；广州市属高校科技计划项目（62064）；广州大学科研创新团队项目(2008)

Experimental Research on the Dynamic Split Properties of Steel Fiber Reinforced Concrete

JIAO Chu-jie₁, JIANG Guo-ping₂, GAO Le₁

(1.School of Civil Engineering, Guangzhou University, Guangzhou 510006, Guangdon, China；2.Earthquake Engineering Research Test Center, Guangzhou University, Guangzhou510405, Guangdong, China)

Received:2009-07-28 Revised:2009-07-28 Online:2014-05-04
Contact: JIAO Chu-jie₁ E-mail:jiaochujie@sina.com

摘要/Abstract

摘要： 采用分离式霍普金森压杆对钢纤维混凝土（SFRC）进行了动态劈裂实验，测试出其动态劈裂采用分离式霍普金森压杆对钢纤维混凝土（SFRC）进行了动态劈裂实验，测试出其动态劈裂破坏最低强度。SFRC动态劈裂应力时程曲线基本上呈双峰型，随着纤维体积率的增加，SFRC耗能能力相应增大，应力波在SFRC中的衰减程度越大。钢纤维对SFRC的增强和增韧性能良好，在冲击劈裂荷载下，决定试件破坏的主要因素是胶凝体与钢纤维之间的粘结强度，而不是钢纤维本身抗拉强度。

关键词: 爆炸力学, 分离式霍普金森压杆, 钢纤维混凝土, 动态

Abstract: A split Hopkinson pressure bar (SHPB) was employed to test the dynamic minimum split tension strength of steel fiber reinforced concrete (SFRC). The experimental results show that the split tension stress-time curves of SFRC are almost a double-peak pattern. The energy dissipation capacity of SFRC increased with the increase in the volume fractions of steel fibers, and the stress waves attenuated quickly. The strengthening and toughening of SFRC can be remarkably increased due to the addition of the steel fibers. Under impacting split loading, the main destruction factor of the SFRC specimens is the bond strength between the matrix and steel fiber rather than the tensile strength of steel fibers.

Key words: explosion mechanics, split Hopkinson press bar, steel fiber reinforced concrete, dynamic, split

中图分类号:

TU377

焦楚杰₁，蒋国平₂，高乐₁. 钢纤维混凝土动态劈裂实验研究[J]. 兵工学报, 2010, 31(4): 469-472.

JIAO Chu-jie₁, JIANG Guo-ping₂, GAO Le₁. Experimental Research on the Dynamic Split Properties of Steel Fiber Reinforced Concrete[J]. Acta Armamentarii, 2010, 31(4): 469-472.

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