桂林理工大学学报2024，Vol.44Issue(1)：67-74,8.DOI:10.3969/j.issn.1674-9057.2024.01.008
不同类型钢纤维UHPC无腹筋梁受剪性能试验
Experiment on shear performance of different types of steel fiber UHPC beams without stirrups
摘要
Abstract
The shear behavior of ultra-high-performance concrete(UHPC)beams without stirrups was investiga-ted through the single-point loading.Four UHPC beams with different steel fibers were tested until shear failure.The shear capacity,crack,deflection,and toughness were investigated in detail.The results show that the end-hook steel fiber has the better influence on the shear capacity,crack development and deformation,followed by smooth and straight steel fibers.The end-hook type Ⅱ steel fibers are better than end-hook type Ⅰ steel fibers.End-hook type Ⅰ steel fibers and smooth and straight steel fibers have better toughening effect,but share less longitudinal reinforcement tension.The wavy steel fibers share more longitudinal reinforcement tension.The wavy steel fibers improve the crack resistance of UHPC beams better without stirrups,but toughening effect is poorer.By comparison and analysis,the equation by Chen Xuan provides the best prediction accuracy.关键词
超高性能混凝土梁/钢纤维类型/受剪承载力/裂缝/韧性Key words
ultra-high performance concrete beam/steel fiber type/shear load capacity/crack/toughness分类
土木建筑引用本文复制引用
曹霞,任义成,廉德铭,金凌志,李丽,何达波..不同类型钢纤维UHPC无腹筋梁受剪性能试验[J].桂林理工大学学报,2024,44(1):67-74,8.基金项目
国家自然科学基金项目(51368013) （51368013）
广西建筑新能源与节能重点实验室项目(桂科能19-J-21-6) （桂科能19-J-21-6）
广西中青年教师科研基础能力提升项目(2019KY0267) （2019KY0267）
