FRACTURE TOUGHNESS OF STEEL FIBER REINFORCED HIGH STRENGTH CONCRETE AND HIGH STRENGTH CONCRETE UNDER THREE-POINT BENDING

摘要：

Through the three-point bending test on 100 specimens of steel fiber reinforced high strength concrete (SFHSC) and 45 specimens of plain high strength concrete (HSC) with the specimen size of 100mm×100mm× 515mm, the effects of the fiber volume fraction (ρ<,f>) and relative notch depth (a/W) upon the fracture toughness of plain high strength concrete were studied. The probability distribution of the fracture toughness (K<,IC>) of high strength concrete was studied as well. The results show that the increment ratio of the fracture toughness increases linearly with the increase of ρ<,f>. The fracture toughness of steel fiber reinforced high strength concrete and plain high strength concrete decreases with the increase of notch depth. The theoretical distribution function of the fracture toughness of plain high strength concrete is in accordance with the Weibull distribution function according to the statistic analysis of experimental results. Based on the test results, the formula for calculating K<,fIC> was established.

关键词： Steel fiber high-strength concrete probability distribution fracture toughness

作者: D. Y. Gao T. Y. Zhang Q. M. Zhang S. H. Li

作者单位: Research Center of New Style Building Material and Structure, Zhengzhou University, Zhengzhou, China

会议类型: 国际会议

会议名称: 2007年土木工程结构创新与可持续发展国际会议(The International Symposium on Innovation & Sustainability of Structures in Civil Engineering)

会议地点: 上海

会议语种:英文

页码: 767-775

在线出版日期: 2007-11-28（万方平台首次上网日期，不代表论文的发表时间）