This paper designs nine ultra-high performance concrete(UHPC)T-beams for shear performance tests and analyzes the influence of main parameters,such as steel fiber content,stirrup ratio,and shear span-to-depth ratio on the failure mode,crack propagation process,and ultimate shear strength of the test beams.Based on the published data of the ultimate shear strength of 57 UHPC beams,it compares shear strength calculation methods of existing standards from multiple countries.The results commonly indicated that a higher fiber content increased the ultimate shear strength and ductility.A fiber content ratio of 2%to 3%helps to better utilize the shear contribution of steel fibers.Shear strength equations in existing standards were found to underestimate the shear capacity of UHPC T-beams,and the contribution of steel fibers to the ultimate shear strength of UHPC requires further research.
关键词
超高性能混凝土/配纤率/配箍率/剪跨比/受剪性能
Key words
ultra high performance concrete(UHPC)/steel fiber ratio/stirrup ratio/shear span-to-depth ratio/shear behavior
维普
万方数据