Strength and Deformation of Reinforced Concrete Squat Walls with High-Strength Materials

2021 ◽  
Vol 118 (1) ◽  
Keyword(s):  
Reinforced Concrete ◽  
High Strength ◽  
Strength And Deformation ◽  
Squat Walls

Seismic behavior of reinforced concrete squat walls with high strength reinforcements: An experimental study

2019 ◽  
Vol 20 (3) ◽  
pp. 911-931 ◽  
Author(s):  
Xiao‐Lei Chen ◽  
Jian‐Ping Fu ◽  
Xin Hao ◽  
Hong Yang ◽  
De‐Yi Zhang
Keyword(s):  
Experimental Study ◽  
Reinforced Concrete ◽  
Seismic Behavior ◽  
High Strength ◽  
Squat Walls

Repaired Reinforced Concrete Beams with Normal and High Strength Concrete

2013 ◽  
Vol 6 (2) ◽  
pp. 21-37
Author(s):  
Emad Yassin Khudhair
Keyword(s):  
Reinforced Concrete ◽  
High Strength Concrete ◽  
High Strength ◽  
Fiber Reinforced Concrete ◽  
Reinforced Concrete Beams ◽  
Wire Mesh ◽  
Strength Concrete ◽  
Strength And Deformation ◽  
Normal Strength ◽  
Concrete Elements

In resent years several attempts were undertaken to repair damaged reinforced concrete structures. Studies on the effectiveness of repaired and strengthened reinforced concrete elements which fail primarily due to formation of major flexural cracks are same what limited for normal strength concrete (NSC) and very limited for high strength concrete (HSC). The overall objective of the present work is to investigate the strength and deformation characteristics in flexure of reinforced HSC and NSC beams repaired with either with concrete alone or with fiber reinforced concrete or with Welded Wire Mesh (W.W.M). From the results obtained, it was found that the beams were adequately repaired and the general mode of failure was flexural. The repaired beams had higher strength than the original beams. All repaired beams exhibited significant decrease in deflection than the original beams.

scholarly journals ENHANCEMENT OF THE REINFORCED CONCRETE PLAIN STRUCTURES DESIGN METHODS WITH THE TAKING INTO CONSIDERATION THE TRUE PROPERTIES OF HIGH PERFORMANCE CONCRETES

2018 ◽  
Vol 14 (2) ◽  
pp. 78-89
Author(s):  
Nikolay I. Karpenko ◽  
Sergey N. Karpenko ◽  
Alexey N. Petrov
Keyword(s):  
Reinforced Concrete ◽  
High Performance ◽  
High Strength ◽  
Design Methods ◽  
Design Stage ◽  
Deformation Model ◽  
Deformation Properties ◽  
Strength And Deformation ◽  
Actual Strength ◽  
Nonlinear Deformation Model

The enhancement of the reinforced concrete plain structures design methods on the basis of the deformation theory of the plasticity of reinforced concrete with cracks by N.I. Karpenko is considered. The deformation model of reinforced concrete with cracks taking into account the deformation diagrams of concrete and reinforcement is used for numerical analysis of a deep beam made of high-strength concrete of class B100. The analysis makes it possible to con­clude that taking into account the actual properties of materials significantly improves the accuracy of computer model­ing. The strength of concrete is the decisive factor determining the mechanism of structural failure and the efficiency of using reinforcement. At the design stage, the most reliable and accurate tool for assessing the operational fitness of pla­nar reinforced concrete structures is computer modeling based on a nonlinear deformation model, taking into account the actual strength and deformation properties of concrete and reinforcement

scholarly journals Resistance of an Optimized Ultra-High Performance Fiber Reinforced Concrete to Projectile Impact

Buildings ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 63
Author(s):  
Anna L. Mina ◽  
Michael F. Petrou ◽  
Konstantinos G. Trezos
Keyword(s):  
Reinforced Concrete ◽  
High Performance ◽  
High Performance Concrete ◽  
High Strength ◽  
Fiber Reinforced Concrete ◽  
Steel Fibers ◽  
Fiber Reinforced ◽  
Depth Of Penetration ◽  
Projectile Impact ◽  
High Performance Fiber

The scope of this paper is to investigate the performance of ultra-high performance fiber reinforced concrete (UHPFRC) concrete slabs, under projectile impact. Mixture performance under impact loading was examined using bullets with 7.62 mm diameter and initial velocity 800 m/s. The UHPFRC, used in this study, consists of a combination of steel fibers of two lengths: 6 mm and 13 mm with the same diameter of 0.16 mm. Six composition mixtures were tested, four UHPFRC, one ultra-high performance concrete (UHPC), without steel fibers, and high strength concrete (HSC). Slabs with thicknesses of 15, 30, 50, and 70 mm were produced and subjected to real shotgun fire in the field. Penetration depth, material volume loss, and crater diameter were measured and analyzed. The test results show that the mixture with a combination of 3% 6 mm and 3% of 13 mm length of steel fibers exhibited the best resistance to projectile impact and only the slabs with 15 mm thickness had perforation. Empirical models that predict the depth of penetration were compared with the experimental results. This material can be used as an overlay to buildings or to construct small precast structures.

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