Tensile fracture properties of an Ultra High Performance Fiber Reinforced Concrete (UHPFRC) with steel fiber

2010 ◽  
Vol 92 (1) ◽  
pp. 61-71 ◽  
Author(s):  
Su-Tae Kang ◽  
Yun Lee ◽  
Yon-Dong Park ◽  
Jin-Keun Kim
Keyword(s):  
Reinforced Concrete ◽  
High Performance ◽  
Steel Fiber ◽  
Fiber Reinforced Concrete ◽  
Tensile Fracture ◽  
Fiber Reinforced ◽  
Fracture Properties ◽  
High Performance Fiber

Ultra High Performance Fiber Reinforced Concrete Behavior under Static and High Velocity Impact

2016 ◽  
Vol 711 ◽  
pp. 171-178 ◽  
Author(s):  
Christophe Pontiroli ◽  
Benjamin Erzar ◽  
Eric Buzaud
Keyword(s):  
Reinforced Concrete ◽  
High Performance ◽  
Fiber Reinforced Concrete ◽  
Tensile Fracture ◽  
Fiber Reinforced ◽  
Rigid Projectile ◽  
High Performance Fiber ◽  
Numerical Research ◽  
Concrete Model

To evaluate the vulnerability of ultra-high performance fiber reinforced concrete (UHPFRC) infrastructure to rigid projectile penetration, CEA-Gramat has led since few years an experimental and numerical research program in collaboration with French universities. During the penetration process, concrete is subjected to extreme conditions of pressure and strain-rate. Plasticity mechanisms as well as dynamic tensile and/or shear damages are activated during the tunneling phase and the cratering of the concrete target. Each mechanism has been investigated independently at the laboratory scale and the role of steel fibers has been specially analyzed to understand their influence on the macroscopic behavior. In parallel, some improvements have been introduced into the concrete model developed by Pontiroli, Rouquand and Mazars (PRM model), especially to take into account the fibers contribution in the tensile fracture process. The capabilities of the PRM model have been illustrated by performing numerical simulations of material characterization experiments. Next step will be to assess the concrete model to simulate projectile penetration into UHPFRC concrete structures.

scholarly journals Effect of confining pressure on shear resistance of ultra-high-performance fiber reinforced concrete

2020 ◽  
Vol 14 (2) ◽  
pp. 108-115
Author(s):  
Ngo Tri Thuong
Keyword(s):  
Shear Strength ◽  
Reinforced Concrete ◽  
High Performance ◽  
Steel Fiber ◽  
Confining Pressure ◽  
Shear Resistance ◽  
Fiber Reinforced Concrete ◽  
Test Method ◽  
Fiber Reinforced ◽  
High Performance Fiber

Effect of confining pressure on the shear resistance of ultra-high-performance fiber-reinforced concrete (UHPFRCs), containing 1.5% volume content (1.5 vol.-%) of short smooth steel fiber (SS, l = 13, d = 0.2 mm) and long smooth steel fiber (LS, l = 30, d = 0.3 mm), was investigated using a new shear test method. Three levels of confining pressure were generated and maintained to the longitudinal axis of the specimen prior shear loading was applied. The test results exhibited that the shear strength of UHPFRCs was obviously sensitive to the confining pressure: the higher confining pressure produced higher shear strength. UHPFRC reinforced with 1.5 vol.-% long smooth steel fiber exhibited higher shear resistance than those reinforced with short smooth steel fiber, regardless of confining pressure levels. The confined shear strength could be expressed as an empirical function of unconfined shear strength, confining pressure, and tensile strength of UHPFRCs. Keywords: UHPFRCs, shear resistance; confining pressure effect; smooth fiber.

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