钢纤维对混杂纤维混凝土抗弯性能的影响研究

摘要

The flexural toughness of hybrid fiber reinforced concrete ( HFRC) beams was tested under a three point bending system, and the data of experiments were analyzed according to the Technical specification for application of fiber reinforced concrete JGJ/T221-2010 and RILEM recommendation. The results showed that the increase of steel fibers ( aspect ratio was 100 ) volume ratio in the HFRC caused the increase of flexural toughness, and both nominal ultimate flexural strength and equivalent flexural strength of beams increased with the increase of aspect ratio of steel fiber. Furthermore, the water-binder ratio of HFRC significantly influenced the flexural behavior.%采用三点弯曲试验对混杂纤维混凝土梁进行测试，通过《纤维混凝土应用技术规程》JGJ／T221-2010和RILEM的方法进行数据分析。从钢纤维的掺量（长径比为100）、长径比、水胶比3个方面对混凝土梁抗弯性能进行研究，结果表明混凝土的抗弯韧性随着钢纤维掺量的增加而增大，名义抗弯强度和等效抗弯强度随着钢纤维长径比的增大而增大，并且混凝土的抗弯性能与水胶比有密切的相关性。