scholarly journals Shear behavior of steel or basalt fiber reinforced concrete beams without stirrup reinforcement

2017 ◽  
Vol 4 (20) ◽  
pp. 391-404
Author(s):  
Julita Krassowska ◽  
Marta Kosior-Kazberuk
Keyword(s):  
Reinforced Concrete ◽  
Steel Fiber ◽  
Concrete Beams ◽  
Basalt Fiber ◽  
Shear Behavior ◽  
Fiber Content ◽  
Fiber Reinforced Concrete ◽  
Reinforced Concrete Beams ◽  
Shear Reinforcement ◽  
Fiber Reinforced

The paper presents the results of a comprehensive investigation aimed at studying the shear behavior of basalt or steel fiber-reinforced concrete (BFRC or SFRC) beams, as well as analyzing the possibility of using basalt or steel fibers as a minimum shear reinforcement. Two-span reinforced concrete beams with the cross-section of 8×16 cm and length of 200 cm and diversified spacing of stirrups were tested. Steel stirrups or alternatively steel or basalt fibers were used as a shear reinforcement. Steel fiber content was 80 and 120 kg/m3and basalt fiber content was 2.5 and 5.0 kg/m3. The shear behavior and/or bending capacity of SFRC and BFRC beams were studied. The result indicated that fibers can be safely used as a minimum shear reinforcement.

scholarly journals Experimental Investigation of Shear Behavior of Two-Span Fiber Reinforced Concrete Beams

2019 ◽  
Vol 65 (2) ◽  
pp. 35-55 ◽  
Author(s):  
J. Krassowska ◽  
M. Kosior-Kazberuk
Keyword(s):  
Reinforced Concrete ◽  
Concrete Beams ◽  
Basalt Fiber ◽  
Shear Capacity ◽  
Fiber Content ◽  
Fiber Reinforced Concrete ◽  
Reinforced Concrete Beams ◽  
Bending Test ◽  
Shear Reinforcement ◽  
Fiber Reinforced

AbstractExperimental tests were carried out to assess the failure model of steel and basalt fiber reinforced concrete two-span beams. Experimental research was focused on observing the changes in behavior of tested elements in dependence on the ratio of shear reinforcement and type of fiber. The beams had varied stirrup spacing. The steel fiber content was 78.5 kg/m3 (1.0% by vol.) and basalt fiber content was 5.0 kg/m3 (0.19% by vol.). Concrete beams without fibers were also examined. Two-span beams with a cross-section of 120×300 mm and a length of 4150 mm were loaded in a five-point bending test. Shear or flexural capacity of tested members was recorded. The effectiveness of both sorts of fibers as shear reinforcement was assessed and the differences were discussed. It was shown that fibers control the cracking process and the values of deflections and strains. Fibers clearly enhance the shear capacity of reinforced concrete beams.

Simulation of shear behavior of corroded reinforced concrete beams flexurally repaired with steel fiber-reinforced concrete

Structures ◽  
2021 ◽  
Vol 34 ◽  
pp. 1545-1559
Author(s):  
Linh Van Hong Bui ◽  
Pitcha Jongvivatsakul ◽  
Pornpen Limpaninlachat ◽  
Boonchai Stitmannaithum ◽  
Thanh-Truong Nguyen ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Steel Fiber ◽  
Concrete Beams ◽  
Shear Behavior ◽  
Fiber Reinforced Concrete ◽  
Reinforced Concrete Beams ◽  
Fiber Reinforced ◽  
Steel Fiber Reinforced Concrete

Effective fiber type investigation on the shear behavior of ultrahigh-performance fiber-reinforced concrete beams

2019 ◽  
Vol 22 (7) ◽  
pp. 1591-1605 ◽  
Author(s):  
Altuğ Yavaş ◽  
Umut Hasgul ◽  
Kaan Turker ◽  
Tamer Birol
Keyword(s):  
Reinforced Concrete ◽  
Concrete Beams ◽  
Fiber Type ◽  
Shear Behavior ◽  
Fiber Reinforced Concrete ◽  
Reinforced Concrete Beams ◽  
Fiber Types ◽  
Shear Reinforcement ◽  
Fiber Reinforced ◽  
Straight Fiber

In this study, the effects of different fiber types on shear behavior (cracking pattern, shear cracking strength, ultimate shear strength, and post-cracking deformability) of ultrahigh-performance fiber-reinforced concrete beams were investigated experimentally. For this purpose, 15 ultrahigh-performance fiber-reinforced concrete beams including different steel fiber types (two straight, two hooked, and one double hooked) with three volume fractions (0.5%, 1.0%, and 1.5%) were casted without shear reinforcement and tested under four-point loading until the failure. In addition to the experimental program, three existing numerical models proposed for the shear capacity of fiber-reinforced concrete beams were investigated to show the applicability of these models to the ultrahigh-performance fiber-reinforced concrete beams. The experimental results demonstrated that the straight fiber of 13 mm is the most effective fiber type in terms of the considered parameters. However, the addition of 13-mm straight fiber with 1.5% by volume into the ultrahigh-performance fiber-reinforced concrete beam changed the failure mode from the shear to flexure without shear reinforcement.

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