A study of strain-rate effect and fiber reinforcement effect on dynamic behavior of steel fiber-reinforced concrete

Sun, Xiaodong; Zhao, Kai; Yong-chi, LI; Huang, Ruijie; Ye, Zhongbao; Zhang, Yongliang; Ma, Jian

doi:10.1016/j.conbuildmat.2017.09.093

Cited by 88 publications

(24 citation statements)

References 15 publications

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“…Similar to that in Sun et al's work, the area enclosed by stress–strain curve and the axes was defined as energy absorption, regarding as an evaluation of concrete toughness. One can note from Table that the energy absorption of FR‐UHSC increases with increasing strain rate.…”

Section: Results and Analysesmentioning

confidence: 99%

Static and dynamic mechanical properties of eco‐friendly polyvinyl alcohol fiber‐reinforced ultra‐high‐strength concrete

Zhang

Jin

YiShui

et al. 2019

Structural Concrete

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An eco‐friendly polyvinyl alcohol (PVA) fiber‐reinforced ultra‐high‐strength concrete (PFR‐UHSC) was designed and mixed to evaluate its static and dynamic mechanical properties in this study. A lower water‐to‐binder ratio of 0.22 and a superplasticizer were used to guarantee the performance of PFR‐UHSC, while several industrial by‐products were involved to reduce the negative environmental impact of concrete. Four volume fraction of PVA fibers (Vf = 0, 0.5, 1.0, and 1.5%) were included in the experiment and steel fiber‐reinforced ultra‐high‐strength concrete (SFR‐UHSC) with Vf = 1.0% was also tested as a comparison. Experiment results show that although less ductile than SFR‐UHSC, PFR‐UHSC exhibits relatively good ductility, toughness, and deformability under static loadings. Namely, splitting tensile and flexural strengths as well as flexural toughness of PFR‐UHSC are significantly improved by the incorporation of PVA fibers while no obvious variation is viewed for Young's modulus. And even, the compressive strength of PFR‐UHSC decreases slightly with the increasing PVA fiber dosage. When subjected to dynamic loadings with lower strain rates, PFR‐UHSC displays a better performance than SFR‐UHSC in terms of failure patterns, while a reverse behavior is observed for high strain rate. Affected by introduction of PVA fiber, the enhancement of strain rate for compressive strength of PFR‐UHSC is lower than that for ordinary concrete but higher than that for SFR‐UHSC. Besides, although having a slightly lower compressive toughness, the energy absorption capacity of PFR‐UHSC is similar to that of SFR‐UHSC.

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Section: Results and Analysesmentioning

confidence: 99%

Static and dynamic mechanical properties of eco‐friendly polyvinyl alcohol fiber‐reinforced ultra‐high‐strength concrete

Zhang

Jin

YiShui

et al. 2019

Structural Concrete

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“…e principle of SHPB test is based on the assumptions of one-dimensional stress wave and stress uniformity [17], that is, without considering the strain rate effect of the pressure bar, and the two-dimensional dispersion effect of the stress wave propagates between the pressure bar and specimen. In addition, when the stress wave has at least two transmission-reflection processes through the sample, the stress can be regarded as equal everywhere inside the sample.…”

Section: Specimens Preparation and Experimental Methodsmentioning

confidence: 99%

Dynamic Mechanical Properties and Fractal Characteristics of Polypropylene Fiber-Reinforced Cement Soil under Impact Loading

Pang

Huang

2019

Advances in Materials Science and Engineering

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This paper aims to study the dynamic mechanical properties, failure patterns, fractal behaviors, and energy dissipation of polypropylene fiber-reinforced cement soil under impact loading. Dynamic compression tests for reinforced cement soil with different polypropylene fiber contents of 0%, 0.4%, 0.8%, and 1.2% were conducted using a 50 mm diameter split Hopkinson pressure bar (SHPB) device. The static and dynamic stress-strain curves, dynamic strength increase factor (DIF), fractal behaviors, and energy dissipation properties of polypropylene fiber-reinforced cement soil were investigated and analyzed. The experimental results indicated that the dynamic strength increase factor (DIF) of cement soil increases firstly and then decreases with the increase of polypropylene fiber content from 0% to 1.2%. The maximum dynamic compressive strength of cement soil was obtained with adding 0.8% polypropylene fiber. With the increase of polypropylene fiber content, the average particle size of cement soil fragments has an increasing trend, whereas the fractal dimension presents a decreasing trend. Besides, the fragmentation degree of cement soil decreases correspondingly with the increase of polypropylene fiber content. The fractal dimension value has a linear relationship with the polypropylene fiber content and a decreasing exponential relationship with the average particle size. The absorbed energy per unit volume of cement soil presents an increasing trend firstly and a decreasing trend subsequently as the polypropylene fiber content increases from 0% to 1.2%. When the fractal dimension of cement soil is kept in the range of 2.04 to 2.15, the absorbed energy per unit volume of cement soil increases first and then decreases. The absorbed energy per unit volume of cement soil has a quadratic parabola relationship with polypropylene fiber content and fractal dimension, respectively. At last, the relationship of the absorbed energy per unit volume, fractal dimension, and polypropylene fiber content can be established, which can be used in the studies of dynamic behaviors and fractal properties of the fiber-reinforced cement soil under impact loading.

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“…The energy absorption ability of concrete is also affected by steel fiber volume fraction as the strain rate is higher than 100/s. The experimental results of Sun et al [15] indicated that the strain-rate strengthening effect of concrete is reduced with the increase of steel fiber volume fraction. Hou et al [16] investigated the dynamic compressive behavior of Reactive Powder Concrete (RPC) with 2% and 5% steel fiber at the strain rate range from 75/s to 274/s.…”

Section: Introduction Imentioning

confidence: 99%

Experimental Investigation and Gaussian Process Emulation of Steel Skeleton Reinforced Concrete Behaviors in Split Hopkinson Pressure Bar Tests

Wang¹,

DiazDelaO²

2020

IJSCER

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This paper conducts split Hopkinson pressure bar (SHPB) experiments to investigate the dynamic compressive properties of steel skeleton reinforced concrete (SSRC) materials. The SSRC specimens with the different volume fraction of steel range from 0 to 2.94% are investigated by conducting quasi-static and SHPB compression tests, respectively. In SHPB tests, the strain rate achieves from 30 s-1 to 100 s-1. The concrete matrix for all SSRC specimens is mixed to obtain a compressive strength of 45 MPa. The influences of different steel skeleton arrangements on the compressive strength, energy absorption, dynamic strain-stress relations, and failure modes are discussed and compared. The most important indicator, dynamic increase factor (DIF) relations of SSRC for compressive strength and Young's modulus are modelled probabilistically using Gaussian process (GP) emulation under the Bayesian framework. The corresponding performances are validated by individual prediction errors (IPE) diagnostics. The experimental results demonstrate that by adding certain types of steel skeleton into plain concrete, which gives a general better bonding property to concrete materials and increases the capacities of dynamic compressive strength, dynamic resistance and energy absorption.

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A study of strain-rate effect and fiber reinforcement effect on dynamic behavior of steel fiber-reinforced concrete

Cited by 88 publications

References 15 publications

Static and dynamic mechanical properties of eco‐friendly polyvinyl alcohol fiber‐reinforced ultra‐high‐strength concrete

Static and dynamic mechanical properties of eco‐friendly polyvinyl alcohol fiber‐reinforced ultra‐high‐strength concrete

Dynamic Mechanical Properties and Fractal Characteristics of Polypropylene Fiber-Reinforced Cement Soil under Impact Loading

Experimental Investigation and Gaussian Process Emulation of Steel Skeleton Reinforced Concrete Behaviors in Split Hopkinson Pressure Bar Tests

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