Study on Energy Absorption Capacity of Steel–Polyester Hybrid Fiber Reinforced Concrete Under Uni-axial Compression

2018 ◽  
Vol 99 (3) ◽  
pp. 547-553 ◽  
Author(s):  
C. Chella Gifta ◽  
S. Prabavathy
Keyword(s):  
Reinforced Concrete ◽  
Energy Absorption ◽  
Axial Compression ◽  
Absorption Capacity ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Hybrid Fiber ◽  
Energy Absorption Capacity

Effects of the Reinforcement Positions and Number of Nickel-Titanium SMA Wires on the Structural Properties of HIHFR Beams

2019 ◽  
Vol 947 ◽  
pp. 228-235
Author(s):  
Seung Jo Lee ◽  
Jung Min Park
Keyword(s):  
Reinforced Concrete ◽  
Energy Absorption ◽  
Structural Characteristics ◽  
Reinforced Concrete Beam ◽  
Absorption Capacity ◽  
Fiber Reinforced Concrete ◽  
Hybrid Fiber ◽  
Energy Absorption Capacity ◽  
Displacement Ductility ◽  
The Relationship

This study investigated the effects of the reinforcement positions and the number of shape memory alloys (SMAs) on the structural characteristics of highly intelligent hybrid fiber reinforced concrete (hereinafter, HIHFR) beams. First, tests were conducted under monotonic loading conditions. To examine such structural characteristics, the load-deflection curve relationship and crack patterns, temperature and energy absorption, temperature and displacement ductility, displacement ductility and energy absorption, and the relationship between the displacement ductility and resilience were compared and analyzed. The reinforced concrete beam (RCB) exhibited somewhat excellent values in terms of displacement ductility, but showed the lowest values in terms of strength, resilience, and energy absorption capacity. HIHFR1 exhibited the most excellent results among the test samples in terms of resilience and energy absorption capacity. Therefore, SMAs were partially substituted for the compressive, tension, and shear reinforcement of the existing RCBs. As a result, the substitution for the compressive and tension reinforcement exhibited the best results, confirming the possibility of using SMAs as a substitute for steel reinforcement.

scholarly journals Load-Deflection Characteristics Of Steel, Polypropylene And Hybrid Fiber Reinforced Concrete Beams

2015 ◽  
Vol 61 (1) ◽  
pp. 59-72 ◽  
Author(s):  
M. Tamil Selvi ◽  
T. S. Thandavamoorthy
Keyword(s):  
Reinforced Concrete ◽  
Energy Absorption ◽  
Concrete Beams ◽  
Absorption Capacity ◽  
Fiber Reinforced Concrete ◽  
Reinforced Concrete Beams ◽  
Hybrid Fiber ◽  
Hybrid Fibers ◽  
Energy Absorption Capacity ◽  
Load Carrying

AbstractConcrete is the most widely used construction material because of its specialty of being cast into any desired shape. The main requirements of earthquake resistant structures are good ductility and energy absorption capacity. Fiber reinforced concrete possesses high flexural and tensile strength, improved ductility, and high energy absorption over the conventional concrete in sustaining dynamic loads. The aim of this paper is to compare the properties of concrete beams in which three types of fibers are added individually. Steel fibers, polypropylene fibers and hybrid fibers were added to concrete in the weight ratio of four percentages in the preparation of four beam specimens. The fourth specimen did not contain fibers and acted as a control specimen. The dimensions of the beam specimens were 150 mm × 150 mm × 700 mm. The reinforced concrete beams of M30 grade concrete were prepared for casting and testing. Various parameters such as load carrying capacity, stiffness degradation, ductility characteristics and energy absorption capacity of FRC beams were compared with that of RC beams. The companion specimens were cast and tested to study strength properties and then the results were compared. All the beams were tested under three point bending under Universal Testing Machine (UTM). The results were evaluated with respect to modulus of elasticity, first crack load, ultimate load, and ultimate deflection. The test result shows that use of hybrid fiber improves the flexural performance of the reinforced concrete beams. The flexural behavior and stiffness of the tested beams were calculated, and compared with respect to their load carrying capacities. Comparison was also made with theoretical calculations in order to determine the load-deflection curves of the tested beams. Results of the experimental programme were compared with theoretical predictions. Based on the results of the experimental programme, it can be concluded that the addition of steel, polypropylene and hybrid fibers by 4% by weight of cement (but 2.14 % by volume of cement) had the best effect on the stiffness and energy absorption capacity of the beams.

Flexural Toughness of Hybrid Fiber Reinforced Concrete under Notched Beam Three-Point Bending

2014 ◽  
Vol 906 ◽  
pp. 311-317
Author(s):  
Si Hui Xiong ◽  
Dong Tao Xia ◽  
Xiang Kun Liu
Keyword(s):  
Reinforced Concrete ◽  
Energy Absorption ◽  
Steel Fiber ◽  
Polypropylene Fiber ◽  
Fiber Reinforced Concrete ◽  
Test Method ◽  
Fiber Reinforced ◽  
Hybrid Fiber ◽  
Flexural Toughness ◽  
Polypropylene Fiber Reinforced Concrete

In order to focus on hybrid fiber reinforced concrete flexural toughness,mixed 0.7% steel fiber/0.3% modified polypropylene fiber reinforced concrete, mixed 0.89% steel fiber/0.11% Dura fiber reinforced concrete were chosen to perform flexural toughness test. The test method is giving a central point load to the notched beam specimens (H*B*L1:150mm*150mm*550mm, h1*B1:2mm*25mm) with a 0.2 mm/min loading rate. The load we carry out should not stop until the mid span deflection is more than 3mm.Based on calculating the contribution of the fiber to the energy absorption value Dcr when the concrete cracking,the contribution of the fiber to the energy absorption value D1f when mid-span deflection is δ1,the contribution of the fiber to the energy absorption value D2f when mid-span deflection isδ2 and the equivalent flexural tensile strength feq1,feq2,the effect of the way use to hybrid fiber on the flexural toughness of concrete were investigated. The results shows that the hybrid fiber can significantly improve the flexural toughness of concrete, have favorable deformability and the ability to control crack. The result of 0.7% steel fiber/0.3% modified polypropylene fiber reinforced concrete is shown: Dcr=2185 Nmm,D1f=7634.26 Nmm,D2f=2198.67 Nmm, feq1=4.89 MPa,feq2=2.83 MPa, hence it shows the positive enhancement effect of hybrid fiber and flexural toughness increase significantly.

scholarly journals A review on hybrid fiber reinforced concrete pavements technology

2021 ◽  
Vol 1895 (1) ◽  
pp. 012053
Author(s):  
Hadeel M. Shakir ◽  
Ahmed Farhan Al-Tameemi ◽  
Adel A. Al-Azzawi
Keyword(s):  
Reinforced Concrete ◽  
Fiber Reinforced Concrete ◽  
Concrete Pavements ◽  
Fiber Reinforced ◽  
Hybrid Fiber

Experimental Study of Bending Toughness on Hybrid Fiber Reinforced Concrete

2013 ◽  
Vol 327 ◽  
pp. 201-204
Author(s):  
Jin Song Shi ◽  
Bo Yuan ◽  
Da Zhang Wang ◽  
Zhe An Lu
Keyword(s):  
Experimental Study ◽  
Reinforced Concrete ◽  
Fiber Reinforced Concrete ◽  
Bending Test ◽  
Fiber Reinforced ◽  
Hybrid Fiber ◽  
Toughness Index ◽  
The Difference ◽  
Loading Methods ◽  
Index Value

In order to investigate the difference of current toughness index standards for fiber reinforced concrete, two main groups of specimens were made to take bending toughness test with the requirements of corresponded standards, loading methods and loading speeds, which are ASTM C1018 in America, ACI 544 and JSCE G552 in Japan. United with software Origin, the load-deflection curves gathered from bending test was calculated with relative standards. The results show that the calculated toughness index value with ASTM C1018-98 in America is more accurate with three grades but the requested deflection of testing is much longer than others while ACI 544 and JSCE G552 in Japan are quite the contrary.

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