Flexural fatigue behavior of layered hybrid fiber reinforced concrete

This paper presents the results of an experimental investigation to determine the flexural fatigue strength and fatigue life of concrete beams reinforced with monofilament polyacrylonitrile fibers (PAN fiber for short). The performance of fresh concrete and the elastic and mechanical properties of hardened concrete are compared by samples with and without fibers. The toughness calculated according to both ASTM and JCI methods increased with the addition of fibers. The toughness indexes I5 was 3.8-4.2 times，I10 was 5.8—6.8 times that of the plain concrete. The equivalent strength was 0.63-0.87 MPa for PAN fiber reinforced concrete. When compared to plain concrete, the endurance limit of concrete beams only reinforced with PAN fiber is increased by 12 percent.

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Experimental Investigations and Numerical Simulations on the Flexural Fatigue Behavior of Plain and Fiber-Reinforced Concrete

Journal of Materials in Civil Engineering ◽

10.1061/(asce)mt.1943-5533.0002351 ◽

2018 ◽

Vol 30 (8) ◽

pp. 04018151 ◽

Cited By ~ 9

Author(s):

Nawal Kishor Banjara ◽

K. Ramanjaneyulu

Keyword(s):

Reinforced Concrete ◽

Numerical Simulations ◽

Fatigue Behavior ◽

Fiber Reinforced Concrete ◽

Experimental Investigations ◽

Fiber Reinforced ◽

Flexural Fatigue

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Study on Flexural Fatigue Performance and Damage Laws of Hybrid Fiber Reinforced Concrete

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.129-131.1138 ◽

2010 ◽

Vol 129-131 ◽

pp. 1138-1141

Author(s):

Meng Chen ◽

Zhe An Lu ◽

Zhi Gang Ren ◽

You Zou

Keyword(s):

Reinforced Concrete ◽

Plain Concrete ◽

Single Step ◽

Fiber Reinforced Concrete ◽

Fatigue Performance ◽

Fatigue Properties ◽

Fiber Reinforced ◽

Hybrid Fiber ◽

Flexural Fatigue ◽

Fatigue Experiment

The flexural fatigue experiment of plain concrete (C) and Steel - Polypropylene Hybrid Fiber Reinforced Concrete (HFRC) is carried out to study the flexural fatigue performance and damage laws under cyclic loading. With the strain gauges pasted on the bottom of the specimens, the strain is collected by dynamic acquisition instrument.We obtain the fatigue life and the maximum strain - cyclic ratio ( ) curves by counting and analyzing the results of fatigue experiment ,which move forward a single step for analysis of fatigue damage laws of HFRC. The study would provide reference for flexural fatigue properties of HFRC.

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Flexural Fatigue Behavior of PAN Fiber Reinforced Concrete under Cyclic Loading

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.168-170.2143 ◽

2010 ◽

Vol 168-170 ◽

pp. 2143-2149

Author(s):

Wei Dong Zhuo ◽

Shang Guan Ping ◽

Yin Gu

Keyword(s):

Reinforced Concrete ◽

Damage Mechanics ◽

Fatigue Testing ◽

Fatigue Behavior ◽

Research Work ◽

Fiber Reinforced Concrete ◽

Experimental Program ◽

Fiber Reinforced ◽

Flexural Fatigue ◽

Pan Fiber

The flexural fatigue performance of polyacrylonitrile (PAN) fiber reinforced concrete (PANFRC）was investigated by third-point loading tests. Based on the previous research work, optimum mixture proportions of PANFRC for highway overlays and bridge decks that satisfied both the minimum compressive and bending strengths, and showed excellent mechanical properties, were selected for fatigue testing. The experimental program included a total of 69 flexural specimens, 15 of which were plain concrete specimens, and the remaining 54 specimens were PANFRC specimens. Three mixes containing 0.0%, 0.1 %, and 0.15% of PAN fiber volume fractions were selected. For each mix, 4 different target load ranges were applied: 10–75%, 10–80%, 10–85%, and 10–90% of the ultimate flexural capacity, as obtained from the corresponding control static test. The bending fatigue life of PANFRC specimens under various stress ratios are proved to follow two-parameter Weibull distribution. Both a semi-logarithm and a double-logarithm P-S-N equations with various failure probabilities are derived from the experimental measurements. The denifition of the fatigue damage variable and damage evolution equation for PANFRC are furtherly proposed based on theory of continuum damage mechanics.

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Assessment of the Post-Cracking Fatigue Behavior of Steel and Polyolefin Fiber-Reinforced Concrete

Materials ◽

10.3390/ma14227087 ◽

2021 ◽

Vol 14 (22) ◽

pp. 7087

Author(s):

Alejandro Enfedaque ◽

Marcos G. Alberti ◽

Jaime C. Gálvez ◽

Jhonatan Santiago Proaño

Keyword(s):

Reinforced Concrete ◽

Fracture Surface ◽

Fatigue Behavior ◽

Limit State ◽

Fatigue Tests ◽

Fiber Reinforced Concrete ◽

Ultimate Limit State ◽

Fiber Reinforced ◽

Steel Fiber Reinforced Concrete ◽

Flexural Fatigue

Some types of fiber-reinforced concrete (FRC) such as steel fiber-reinforced concrete (SFRC) or polyolefin fiber-reinforced concrete (PFRC) are suitable for structural uses but there is still scarce knowledge regarding their flexural fatigue behavior. This study aimed to provide some insight into the matter by carrying out flexural fatigue tests in pre-cracked notched specimens that previously reached the Service Limit State (SLS) or the Ultimate Limit State (ULS). The fatigue cycles applied between 30% and 70% of the pre-crack load at 5 Hz until the collapse of the material or until 1,000,000 cycles were reached. The results showed that the fatigue life of PFRC both at SLS or ULS was remarkably higher than the correspondent of SFRC. The fracture surface analysis carried out found a linear relation between the fibers present in the fracture surface and the number of cycles that both SFRC and PFRC could bear.

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