摘要
介绍了评价纤维混凝土弯曲韧性的不同方法,提出了修正的弯曲韧度方法来确定初裂挠度,克服其初裂挠度确定困难的缺点.通过试验研究了素混凝土、聚丙烯纤维混凝土和层布式混杂纤维混凝土的弯曲韧性.结果表明,聚丙烯纤维混凝土的弯曲韧度指数高于素混凝土,层布式混杂纤维混凝土的弯曲韧度指数也高于素混凝土,最后分析了纤维混凝土的增韧机理.
The different methods that evaluating flexural toughness of fiber reinforced concrete are introduced. Then the revised flexural toughness method is established, which overcomes the difficulty in obtaining the first cracking displacement by acoustic emission. The flexural toughness of plain concrete, polypropylene fiber reinforced concrete and layered hybrid fiber reinforced concrete are experimentally studied. The experimental results and analysis demonstrate that polypropylene fiber improves the flexural toughness of concrete while layered hybrid fiber improves that by more times. And the reinforcing mechanism is discussed.
出处
《华中科技大学学报（城市科学版）》
CAS
2005年第4期72-74,共3页
Journal of Huazhong University of Science and Technology
基金
武汉理工大学大学生创新研究资助项目(A054)
关键词
层布式混杂纤维混凝土
弯曲韧性
韧度指数
增韧机理
layered hybrid fiber reinforced concrete
flexural toughness
toughness index
reinforcing mechanism
