A study of strain-rate effect and fiber reinforcement effect on dynamic behavior of steel fiber-reinforced concrete. (15th January 2018)

• Record Type: Journal Article
• Authors: Sun, Xiaowang; Zhao, Kai; Li, Yongchi; Huang, Ruiyuan; Ye, Zhongbao; Zhang, Yongliang; Ma, Jian
• Is Part Of: Construction & building materials. Volume 158(2018)
• Page Start: 657
• Page End: 669
• Publication Date: 2018-01-15
• Subjects: Steel fiber-reinforced concrete -- Strain-rate effect -- Fiber reinforcement effect; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2017.09.093
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: SFRC of a large range of fiber content are compressively tested using SHPB facility. Wave-shaper technique is investigated and adopted through the experiment. Strain-rate effect and fiber reinforcement effect of SFRC are studied thoroughly. Mechanisms underlying the two effects and their coupling effect are investigated. Abstract: This paper presents an experimental study on uniaxial mechanical properties of steel fiber-reinforced concrete (SFRC) subjected to high strain-rate compressive loading. SFRC specimens of 6 different steel fiber volume fractions (0.0%, 0.75%, 1.5%, 3.0%, 4.5% and 6.0%) are fabricated and tested using a 75-mm-diameter split Hopkinson pressure bar (SHPB). Wave-shapers are investigated to ensure that two basic assumptions of SHPB hold true and that constant strain-rate is maintained within SFRC specimens. Based on acquired dynamic stress–strain relations, dynamic strength increase factor, fiber reinforcement factor, critical strain, and energy absorption are studied versus both strain-rate and fiber volume fraction. That provides an insight into strain-rate effect and fiber reinforcement effect on dynamic behavior of plain concrete and SFRC. The mechanisms underlying strain-rate effect and fiber reinforcement effect are discussed.