Experimental Study on Seismic Performance of Small Span-to-Depth Ratio Coupling Beams with PVA Fiber Reinforced Concrete

2014 ◽  
Vol 513-517 ◽  
pp. 134-137
Author(s):  
Yan Xia Ye ◽  
Long Hai Qin ◽  
Tao Liu ◽  
Xiang Yang Sun
Keyword(s):  
Reinforced Concrete ◽  
Fiber Reinforced Concrete ◽  
Hysteretic Behavior ◽  
Fiber Reinforced ◽  
Reinforcing Bars ◽  
Coupling Beams ◽  
Static Tests ◽  
Depth Ratio ◽  
Pva Fiber ◽  
Test Result

A series of pseudo-static tests were conducted with 4 coupling beams whose span-depth ratio 1.2. Common reinforced concrete and PVA fiber reinforced concrete were used for different specimens. In each of the specimens, there were longitudinal reinforcement, constructional reinforcement and stirrup, one of the specimens had crossed reinforcing bars. The failure mode of the coupling beams were studied, as well as hysteretic behavior. The test result indicated that using PVA fiber reinforced concrete could improve coupling beams carrying capacity, and could also reduce the amount of stirrup needed for seismic calculation; PVA members ductility was also improved.

scholarly journals Effect of the Notch-to-Depth Ratio on the Post-Cracking Behavior of Steel-Fiber-Reinforced Concrete

Materials ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 445
Author(s):  
José Valdez Aguilar ◽  
César A. Juárez-Alvarado ◽  
José M. Mendoza-Rangel ◽  
Bernardo T. Terán-Torres
Keyword(s):  
Reinforced Concrete ◽  
Plain Concrete ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Steel Fiber Reinforced Concrete ◽  
Cracking Behavior ◽  
Bending Tests ◽  
Depth Ratio ◽  
Residual Performance ◽  
Concrete Control

Concrete barely possesses tensile strength, and it is susceptible to cracking, which leads to a reduction of its service life. Consequently, it is significant to find a complementary material that helps alleviate these drawbacks. The aim of this research was to determine analytically and experimentally the effect of the addition of the steel fibers on the performance of the post-cracking stage on fiber-reinforced concrete, by studying four notch-to-depth ratios of 0, 0.08, 0.16, and 0.33. This was evaluated through 72 bending tests, using plain concrete (control) and fiber-reinforced concrete with volume fibers of 0.25% and 0.50%. Results showed that the specimens with a notch-to-depth ratio up to 0.33 are capable of attaining a hardening behavior. The study concludes that the increase in the dosage leads to an improvement in the residual performance, even though an increase in the notch-to-depth ratio has also occurred.

scholarly journals Blast-Resistant Performance of Hybrid Fiber-Reinforced Concrete (HFRC) Panels Subjected to Contact Detonation

2019 ◽  
Vol 10 (1) ◽  
pp. 241
Author(s):  
Wenjin Yao ◽  
Weiwei Sun ◽  
Ze Shi ◽  
Bingcheng Chen ◽  
Le Chen ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Blast Resistance ◽  
Plain Concrete ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Steel Fiber Reinforced Concrete ◽  
Hybrid Fiber ◽  
Hybrid Effect ◽  
Pva Fiber ◽  
Resistance Performance

This paper experimentally investigates the blast-resistant characteristics of hybrid fiber-reinforced concrete (HFRC) panels by contact detonation tests. The control specimen of plain concrete, polypropylene (PP), polyvinyl alcohol (PVA) and steel fiber-reinforced concrete were prepared and tested for characterization in contrast with PP-Steel HFRC and PVA-Steel HFRC. The sequent contact detonation tests were conducted with panel damage recorded and measured. Damaged HFRC panels were further comparatively analyzed whereby the blast-resistance performance was quantitively assessed via damage coefficient and blast-resistant coefficient. For both PP-Steel and PVA-Steel HFRC, the best blast-resistant performance was achieved at around 1.5% steel + 0.5% PP-fiber hybrid. Finally, the fiber-hybrid effect index was introduced to evaluate the hybrid effect on the explosion-resistance performance of HFRC panels. It revealed that neither PP-fiber or PVA-fiber provide positive hybrid effect on blast-resistant improvement of HFRC panels.

scholarly journals A Comparative Study on Blast-Resistant Performance of Steel and PVA Fiber-Reinforced Concrete: Experimental and Numerical Analyses

Crystals ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 707
Author(s):  
Le Chen ◽  
Weiwei Sun ◽  
Bingcheng Chen ◽  
Sen Xu ◽  
Jianguo Liang ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Blast Resistance ◽  
Natural Extension ◽  
Fiber Reinforced Concrete ◽  
Particle Model ◽  
Model Parameters ◽  
Fiber Reinforced ◽  
Steel Fiber Reinforced Concrete ◽  
Numerical Predictions ◽  
Pva Fiber

This paper deals with the blast-resistant performance of steel fiber-reinforced concrete (SFRC) and polyvinyl alcohol (PVA) fiber-reinforced concrete (PVA-FRC) panels with a contact detonation test both experimentally and numerically. With 2% fiber volumetric content, SFRC and PVA-FRC specimens were prepared and comparatively tested in comparison with plain concrete (PC). SFRC was found to exhibit better blast-resistant performance than PVA-FRC. The dynamic mechanical responses of FRC panels were numerically studied with Lattice Discrete Particle Model-Fiber (LDPM-F) which was recently developed to simulate the meso-structure of quasi-brittle materials. The effect of dispersed fibers was also introduced in this discrete model as a natural extension. Calibration of LDPM-F model parameters was achieved by fitting the compression and bending responses. A numerical model of FRC contact detonation was then validated against the blast test results in terms of damage modes and crater dimensions. Finally, FRC panels with different fiber volumetric fractions (e.g., 0.5%, 1.0% and 1.5%) under blast loadings were further investigated with the validated LDPM-F blast model. The numerical predictions shed some light on the fiber content effect on the FRC blast resistance performance.

Mechanical Properties of Hybrid Basalt-Polyvinyl Alcohol (PVA) Fiber Reinforced Concrete

2017 ◽  
Vol 744 ◽  
pp. 3-7 ◽  
Author(s):  
Asif Jalal ◽  
Nasir Shafiq ◽  
Ehsan Nikbakht ◽  
Rabinder Kumar ◽  
Muhammad Zahid
Keyword(s):  
Reinforced Concrete ◽  
Volume Fraction ◽  
Peak Load ◽  
High Strength ◽  
Plain Concrete ◽  
Fiber Reinforced Concrete ◽  
Maximum Deflection ◽  
Fiber Reinforced ◽  
Fiber Volume ◽  
Pva Fiber

This study focuses on the study of the mechanical behavior of non-metallic hybrid Basalt-PVA fiber reinforced concrete. Total five mixes were investigated with one control plain concrete and four with fiber volume fraction of 0.3%, 0.6%, 0.9% and 1.2%. Basalt and PVA were used in same quantity. Fiber decreased workability, therefore superplasticizer was used to maintain workability constant. The increase in superplasticizer and fiber content decreased compression, split tensile and flexure strengths because of formation of big size pores. Whereas fiber enhanced the post peak load zone in the load-deflection curve. Fiber improved the bridging action by increasing energy absorption. Fiber vanished the brittle behavior of high strength concrete and increased first crack toughness, flexure toughness and also maximum deflection. 0.3% volume fraction of fiber was found to be optimum with the negligible decrease in compression, split tensile and flexure strength while caused the considerable increase in first crack toughness, flexure toughness, and maximum deflection.

Fiber Reinforced Hydraulic Concrete Using Four Gradations of Aggregates

2011 ◽  
Vol 243-249 ◽  
pp. 4614-4618
Author(s):  
Ke Liang Li ◽  
Zhong Zheng Yang ◽  
Wei Ping Nie
Keyword(s):  
Reinforced Concrete ◽  
Tensile Strain ◽  
Physical And Mechanical Properties ◽  
Arch Dam ◽  
Fiber Reinforced Concrete ◽  
Hydropower Station ◽  
Fiber Reinforced ◽  
Thick Fiber ◽  
Hydraulic Concrete ◽  
Pva Fiber

Controlling crack of hyperbolic arch dam with a height of 305 m in Jinping hydropower station is an important problem. To improve the anti-cracking ability and reduce cracking risk of hydraulic concrete, polyvinyl alcohol (PVA) fiber and polypropylene thick fiber were used in hydraulic concrete using four gradations of aggregates. Indoor and productive tests were carried through to comparatively analyze workability, physical and mechanical properties and anti-cracking ability. Workability of fiber reinforced concrete was improved to be in favor of construction. When two kinds of fiber were used in concrete, the anti-cracking ability was greatly enhanced with lower elastic modulus-to-strength ratio and lager ultimate tensile strain. Concrete using PVA fiber had better anti-cracking ability than that of concrete using polypropylene thick fiber. PVA fiber reinforced concrete was applied in Jinping hydropower station. It is proved that PVA fiber reinforced concrete has good properties reaching design requirements of workability, compressive strength, ultimate tensile strain, frost resistance, permeability resistance.

scholarly journals Reinforced concrete and fiber reinforced concrete panels subjected to blast detonations and post-blast static tests

2014 ◽  
Vol 76 ◽  
pp. 24-33 ◽  
Author(s):  
C.P. Pantelides ◽  
T.T. Garfield ◽  
W.D. Richins ◽  
T.K. Larson ◽  
J.E. Blakeley
Keyword(s):  
Reinforced Concrete ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Static Tests ◽  
Concrete Panels
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