Experimental investigation on ultra high performance fiber reinforced concrete beams. Issue 6 (19th March 2023)

• Record Type: Journal Article
• Authors: Ma, Kaize; Ma, Yudong; Liu, Boquan
• Is Part Of: Mechanics of advanced materials and structures. Volume 30:Issue 6(2023)
• Page Start: 1155
• Page End: 1171
• Publication Date: 2023-03-19
• Subjects: Shear behavior -- ultra high performance fiber reinforced concrete beam -- bearing capacity -- finite element analysis; Composite materials -- Mechanical properties -- Periodicals; Composite construction -- Periodicals; 620.118
• DOI: 10.1080/15376494.2022.2028947
• Languages: English
• ISSNs: 1537-6494

Abstract

Abstract: In this study, symmetrical four-point bending tests were performed on ultra high performance fiber reinforced concrete (UHPFRC) beams to investigate their shear behavior. All the UHPFRC beams displayed shear failure modes and exhibited higher shear capacities, deformation capacities and stiffnesses than high-strength concrete (HSC) beams. As the steel fiber volume and stirrup ratio increased, the cracks became much more densely distributed, and the ultimate capacity and ductility improved. Steel fibers could provide the minimum required shear reinforcement, which resulted in the UHPFRC beams showing satisfactory capacity and deformation requirements when the stirrup ratio decreased. The decreased shear span ratio improved the arching mechanism, which led to an increase in the shear capacity. Furthermore, an advanced finite element (FE) analysis method was applied to provide a theoretical basis for the numerical research. In addition, a calculation procedure for the shear capacity of UHPFRC beams was proposed, and the corresponding results were compared with those from the methods recommended by AFGC-Setra 2013 and KCI-2012.