Flexural Fatigue Behavior of a Self-Compacting Ultrahigh Performance Fiber-Reinforced Concrete

2017 ◽  
Vol 29 (11) ◽  
pp. 04017210 ◽  
Author(s):  
B. S. Al-Azzawi ◽  
B. L. Karihaloo
Keyword(s):  
Reinforced Concrete ◽  
Fatigue Behavior ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Flexural Fatigue

Flexural Fatigue Behavior and Performance Characteristics of Polyacrylonitrile Fiber Reinforced Concrete

2006 ◽  
Vol 302-303 ◽  
pp. 572-583
Author(s):  
Zong Cai Deng ◽  
Hong Liang Deng ◽  
Jian Hui Li ◽  
Guo Dong Liu
Keyword(s):  
Reinforced Concrete ◽  
Concrete Beams ◽  
Fatigue Behavior ◽  
Plain Concrete ◽  
Fiber Reinforced Concrete ◽  
Polyacrylonitrile Fiber ◽  
Hardened Concrete ◽  
Fiber Reinforced ◽  
Flexural Fatigue ◽  
Pan Fiber

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.

Flexural Fatigue Behavior of PAN Fiber Reinforced Concrete under Cyclic Loading

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.

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

Materials ◽  
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.

Effect of Fiber Diameter on Fatigue Strength of Fiber Reinforced Concrete and its Design

2011 ◽  
Vol 138-139 ◽  
pp. 810-815 ◽  
Author(s):  
Pang Jo Chun ◽  
Mitao Ohga
Keyword(s):  
Reinforced Concrete ◽  
Theoretical Model ◽  
Fiber Diameter ◽  
Design Method ◽  
Fatigue Behavior ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Stress Degradation ◽  
Fatigue Rupture ◽  
Number Of Cycles

This paper describes the effect of fiber diameter of fiber reinforced concrete (FRC) under fatigue behavior and its design method. Some researchers showed that the fatigue behavior of FRC is mainly governed by the bridging stress degradation, but little information is still available so far. We conducted fatigue tensile experiments of the FRC under constant strain amplitude first and the degradation of bridging stress was measured experimentally. Then, the micromechanics-based theoretical model is also developed, and the model is verified by the test results. The model accounts for the loss of fatigue ruptured fibers of which fatigue rupture is based on S-N relationships. The parametric study from the micromechanics-based theoretical model indicates that the best fiber diameter varies according to the number of cycles and strain level applied to the FRC specimen. The result suggests that we need to design FRC with considering the application and its loading conditions to utilize the capacity of FRC.

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