Ultra-High Performance Hybrid Polyvinyl Alcohol-Polypropylene Fiber-Reinforced Cementitious Composites with Augmented Toughness and Strain-Hardening Behavior

2022 ◽  
Author(s):  
Davood Mostofinejad ◽  
Iman Moosaie ◽  
Mohamadreza Eftekhar ◽  
Ebrahim Hesami
Keyword(s):  
Polyvinyl Alcohol ◽  
Strain Hardening ◽  
High Performance ◽  
Polypropylene Fiber ◽  
Cementitious Composites ◽  
Fiber Reinforced ◽  
Hardening Behavior ◽  
Strain Hardening Behavior ◽  
Fiber Reinforced Cementitious Composites

scholarly journals Probabilistic Analysis for Strain-Hardening Behavior of High-Performance Fiber-Reinforced Concrete

Materials ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 2399 ◽  
Author(s):  
Seung-Won Choi ◽  
Jongkwon Choi ◽  
Seong-Cheol Lee
Keyword(s):  
Reinforced Concrete ◽  
Strain Hardening ◽  
High Performance ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Probable Number ◽  
Hardening Behavior ◽  
Pull Out ◽  
High Performance Fiber ◽  
Strain Hardening Behavior

The practical application of fiber-reinforced concrete (FRC) in structural components has gained growing interest due to structural advantages such as improved tensile strength, distributed load transfer, crack width control, as well as superior durability. To this end, reliable structural assessment techniques and analytical models have been developed, placing emphasis on tension-softening behavior owing to the bond and pull-out mechanisms of fibers at a local crack. However, these models could not be directly applicable to evaluate the multiple cracking mechanisms of high-performance fiber-reinforced concrete (HPFRC), which exhibits strain-hardening behavior. To overcome this challenge, this paper presents a probabilistic analytical technique. This approach has employed the simplified diverse embedment model (SDEM). Then, an HPFRC member was modeled with multiple segments considering the most probable number of cracks. It was assumed that material properties had a normal probability distribution and were randomly assigned to each segment. To have reliable results, 10,000 analyses were performed for each analysis case and validated using experimental test data. Based on the analysis results, the actual strain-hardening tensile behavior of an HPFRC member could be reasonably predicted with the number of segments chosen on the basis of the fiber length.

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