Cracking behavior and energy consumption of Steel Fiber Concrete Encased Steel beams

2021 ◽  
pp. 136943322110297
Author(s):  
Chao Xu ◽  
Kai Wu ◽  
Ping zhou Cao ◽  
Shi-qi Lin ◽  
Zhuo Chen
Keyword(s):  
Energy Consumption ◽  
Steel Fiber ◽  
Steel Reinforcement ◽  
Steel Fibers ◽  
Strengthening Effect ◽  
Fiber Volume ◽  
Volume Percentage ◽  
Cracking Behavior ◽  
Fiber Concrete ◽  
Steel Fiber Concrete

Steel Fiber Concrete Encased Steel (SFCES) beams were subjected to bending to investigate the effect of steel fibers on the behavior of Steel Reinforced Concrete beams with or without steel reinforcement. 18 SFCES beams reinforced with steel fibers, steel reinforcement, or both were cast. The parameters considered in the experiment were (a) the volume percentage of steel fiber (0%, 1%, and 2%), (b) the shear span to depth ratio( s/d = 2.5 and 3.5), (c) the stirrups spacing (180 mm and 360 mm), and (d) the presence or absence of longitudinal reinforcement (2Φ8+2Φ10).The cracking load, crack development, energy dissipation capacity, and ductility of the specimens were investigated. The results illustrate that the cracking load F c, the total energy consumption, and the energy ductility increase with increasing steel fiber volume, and the average improvement with a steel fiber volume increase of 1% can reach 36.5%, 21.2%, and 28.67%, respectively. However, this strengthening effect of steel fibers was weakened due to the addition of steel reinforcement. The influence of the steel fiber volume and reinforcement configuration on each stage of energy consumption was mainly concentrated in the elastic ( E 1) and failure stages ( E 3). Finally, mathematical equations were proposed to predict the cracking load and crack width of the SFCES specimens, which were verified by comparing the predictions with the experiment results.

Experimental Research on Tensile Strength of Specified Density Steel Fiber Concrete

2011 ◽  
Vol 368-373 ◽  
pp. 330-333
Author(s):  
Yan Kun Zhang ◽  
Xiao Hu Li ◽  
Pan Zhang
Keyword(s):  
Tensile Strength ◽  
Steel Fiber ◽  
Lightweight Aggregate ◽  
Splitting Tensile Strength ◽  
Fiber Volume ◽  
Axial Tensile ◽  
Fiber Concrete ◽  
Steel Fiber Concrete ◽  
Substitution Ratio ◽  
The Relationship

Based on the experiment, the splitting tensile strength and axial tensile strength of specified density steel fiber concrete are studied. The influence of type of steel fiber, volume content of the fiber and substitution ratio of lightweight aggregate is analyzed. The relationship between splitting tensile strength and axial tensile strength of specified density steel fiber concrete is suggested.

Performance of Steel Fiber Concrete as Rigid Pavement

2013 ◽  
Vol 723 ◽  
pp. 452-458
Author(s):  
Eva Azhra Latifa ◽  
Robby Aguswari ◽  
Puspito Hadi Wardoyo
Keyword(s):  
Steel Fiber ◽  
Asphalt Pavement ◽  
Steel Fibers ◽  
Hardened Concrete ◽  
Trial And Error ◽  
Rigid Pavement ◽  
Rigid Pavements ◽  
Vehicle Load ◽  
Fiber Concrete ◽  
Steel Fiber Concrete

The concrete as surface pavement is more durable than asphalt pavement, while requiring less maintenance and having longer life. This paper discusses about the benefits of rigid pavements utilizing steel fiber upon receiving vehicle load. The study aims to improve the performance of concrete used as rigid pavement with 0.5 water/cement ratio by adding hook-shaped steel fibers. In this study, the amount of steel fiber varied, ranging from 0 to 15% based on trial and error. The hook-shaped fibers used were manufactured from steel in factory. Performance of samples were conducted in laboratory on fresh and hardened concrete behavior, including flexural strength and flexural toughness. Results showed that all of the assessed concrete performance increased as fiber was added, and the greatest value was obtained with nine percent of fibers.

scholarly journals The Effect of Vibration Mixing on the Mechanical Properties of Steel Fiber Concrete with Different Mix Ratios

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3669
Author(s):  
Chunyu Zhang ◽  
Yikai Sun ◽  
Jianguo Xu ◽  
Bo Wang
Keyword(s):  
Mechanical Properties ◽  
Reinforced Concrete ◽  
Steel Fiber ◽  
Volume Ratio ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Steel Fiber Reinforced Concrete ◽  
Fiber Volume ◽  
Fiber Concrete ◽  
Steel Fiber Concrete

This work addresses how vibration stirring, steel-fiber volume ratio, and matrix strength affect the mechanical properties of steel-fiber-reinforced concrete. The goal of the work is to improve the homogeneity of steel-fiber-reinforced concrete, which is done by comparing the mechanical properties of steel-fiber-reinforced concrete fabricated by ordinary stirring with that fabricated by vibration stirring. The results show that the mechanical properties of steel-fiber-reinforced concrete produced by vibration mixing are better than those produced by ordinary mixing. The general trend is that the mechanical properties of steel-fiber concrete have a linear relationship with the matrix strength and the volume ratio of steel fiber. The best mechanical properties are obtained for a steel-fiber volume ratio of less than 1%. We have also established calculation models for the mechanical performance index of vibration, mixing steel-fiber concrete based on the test results. Microscopic studies show that vibration stirring optimizes the microstructure of the transition zone between the concrete interface and the slurry, and improves the homogeneity of the steel-fiber-reinforced concrete, and enhances the adhesion between the mixture components.

Experiment Research on Compressive Strength of Specified Density Steel Fiber Concrete

2011 ◽  
Vol 374-377 ◽  
pp. 1606-1609
Author(s):  
Pan Zhang ◽  
Yan Kun Zhang ◽  
Xiao Hu Li ◽  
Zhen Lei Guo
Keyword(s):  
Compressive Strength ◽  
Regression Analysis ◽  
Steel Fiber ◽  
Lightweight Aggregate ◽  
Test Results ◽  
Experiment Research ◽  
Fiber Volume ◽  
Fiber Concrete ◽  
Steel Fiber Concrete ◽  
Substitution Ratio

Based on the experimental research, the prism compressive strength and cubic compressive strength of specified density steel fiber concrete are studied. Through regression analysis, the influence of type of steel fiber, volume content of the fiber and substitution ratio of lightweight aggregate is studied. According to the test results, the formula of prism compressive strength and cubic compressive strength is given.

Experiment on Mechanical Properties of Steel Fiber Concrete under Dynamic Load

2013 ◽  
Vol 706-708 ◽  
pp. 535-538
Author(s):  
Qi Sheng Wang ◽  
Guo Xiang Wan ◽  
Qin Rong Chen
Keyword(s):  
Mechanical Properties ◽  
Elastic Modulus ◽  
Strain Rate ◽  
Dynamic Load ◽  
Steel Fiber ◽  
Volume Ratio ◽  
Plain Concrete ◽  
Fiber Volume ◽  
Fiber Concrete ◽  
Steel Fiber Concrete

Mechanical properties of steel fiber concrete under dynamic load had been obtained through dynamic loading experiments of steel fiber concrete in different volume ratios. The experimental results indicate that the dynamic load strength of steel fiber concrete is obviously more than the static load strength, the dynamic load strength increases with the increasing of the steel fiber volume ratio; and the effect of variable strain rate is obvious. When the strain is at 0 ~ 0.01 or smaller, the toughness index of plain concrete is slightly more than steel fiber concrete; the strain exceeded 0.01, the toughness of steel fiber concrete has improved greatly with the increase of the strain. When the strain rate is smaller, the elastic modulus changes little, and once the strain rate is more than 60 per second, the elastic modulus there is the more amplitude with the increase of strain rate.

Study on Nonlinear Finite Element Analysis Method of Multi-Ribbed Composite Slab Structure Containing Steel Fibers

2011 ◽  
Vol 250-253 ◽  
pp. 3975-3982 ◽  
Author(s):  
Ji Sheng Qiu
Keyword(s):  
Finite Element ◽  
Fiber Volume Fraction ◽  
Steel Fiber ◽  
Volume Fraction ◽  
Plastic Hinge ◽  
Analysis Method ◽  
Fiber Volume ◽  
Element Analysis ◽  
Fiber Concrete ◽  
Steel Fiber Concrete

Steel fiber concrete multi-ribbed composite slab system includes material composite and structure type composite, which has good mechanical and thermal insulation properties. This paper presents an assessment of the structure investigated using three-dimensional nonlinear finite elemental analysis. The analysis firstly has focused on solving the constitutive relation of the materials and the effect of steel fiber to determine the finite element simulation. Moreover nonlinear finite element analysis for the mechanical properties of the whole process on the composite structure system has been presented in this paper, and by changing the fiber volume fractionvf(0%, 1%, 2% and 3%) the parameter has been discussed. The analysis results show that stress distributions of the structure are close for different concrete strength and steel fiber volume fraction before formation of the plastic hinge lines of the upper edges. When the structure began to crack and the plastic hinge lines of upper edge gradually formed, due to the influence of the redistribution of internal forces, the steel fiber volume fraction has significant impact for the mechanic behavior of the structure. In addition, the steel fiber volume fraction on the developing and distribution of the cracks has little effect. This analysis method and results for the steel fiber concrete multi-ribbed composite structure can provide some valuable references for the structure research and application.

scholarly journals Experimental and theoretical studies of biaxially prestressed steel-fiber-concrete slabs.

2018 ◽  
Vol 2 (3) ◽  
pp. 10-14
Author(s):  
Oleksandr Zhuravskyi ◽  
Andriy Gorobetc
Keyword(s):  
Steel Fiber ◽  
Physical Nonlinearity ◽  
Concrete Slabs ◽  
Theoretical Studies ◽  
Transverse Loading ◽  
Software Complex ◽  
Fiber Concrete ◽  
Steel Fiber Concrete ◽  
Experimental And Theoretical Studies

The article presents the results of experimental and theoretical studies of strength and deformability of steel-fiber concrete double-sided pre-stress slabs under the action of transverse loading. The simulation of such plates in the software complex LIRA-SAPR was performed taking into account the physical nonlinearity of materials.

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