Dynamic Constitutive Model Analysis of High Parameter Steel Fiber Reinforced Concrete

Luo, Dongmei

doi:10.3390/sym11030377

Cited by 5 publications

(3 citation statements)

References 25 publications

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“…Steel fiber is one of the most popularly used fibers to enhance the mechanical strength of concrete [27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43]. Nguyen et al indicated that the effects of rubber aggregates and fiber reinforcement could result in better cracking resistance for cement mortar [28].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Freeze–Thaw Resistance of Steel Fibers Reinforced Rubber Concrete

et al. 2020

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The reuse of rubber in concrete results in two major opposing effects: an enhancement in durability and a reduction in mechanical strength. In order to strengthen the mechanical properties of rubber concrete, steel fibers were added in this research. The compressive strength, the four-point bending strength, the mass loss rate, and the relative dynamic elastic modulus of steel fiber reinforced rubber concrete, subjected to cyclic freezing and thawing, were tested. The effects of the content of steel fibers on the freeze–thaw resistance are discussed. The microstructure damage was captured and analyzed by Industrial Computed Tomography (ICT) scanning. Results show that the addition of 2.0% steel fibers can increase the compressive strength of rubber concrete by 26.6% if there is no freeze–thaw effect, but the strengthening effect disappears when subjected to cyclic freeze–thaw. The enhancement of steel fibers on the four-point bending strength is effective under cyclic freeze–thaw. The effect of steel fibers is positive on the mass loss rate but negative on the relative dynamic elastic modulus.

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Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Freeze–Thaw Resistance of Steel Fibers Reinforced Rubber Concrete

et al. 2020

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“…Moreover, different mixing contents of PAN fibers added to RC have different effects on the freeze-thaw cycle damage of RC. For the purpose of investigating impact of PAN fiber mixing content on the frost durability of RC, the fiber factor k [43] was introduced to analyze the effect of PAN mixing content on the damage of RC, as shown in equation ( 8):…”

Section: Consequence Of the Mixing Content Of Pan Fibers On The Frost...mentioning

confidence: 99%

Polyacrylonitrile Fiber Recycled Concrete Frost Durability Test And Damage Modeling Study

Wang,

Shen,

Deng

et al. 2024

Preprint

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The recycling of concrete is environment-friendly and contributes to the sustainable development strategy. Recycled concrete can achieve better compressive strength, but there are deficiencies in tensile and frost durability. Then, the polyacrylonitrile fiber can be used as a toughening component due to its good properties such as high tensile strength, high ultimate elongation, etc., which can endow the recycled concrete with higher toughness and maintain the properties of concrete under the high altitude and cold conditions. In this study, mechanical tests and frost durability tests were conducted on polyacrylonitrile fiber recycled concrete with polyacrylonitrile fiber mixing content of 0.7 kg/m3, 0.8 kg/m3, 0.9 kg/m3 and recycled coarse aggregate’s substitution rates of 30%, 40%, and 50%. The results showed that the concrete with the best frost durability is the one with 40% replacement of recycled coarse aggregate and 0.8 kg/cm3 of polyacrylonitrile fiber. Based on the experimental research, a freeze-thaw damage model of polyacrylonitrile fiber recycled concrete was developed, revealing the damage mechanism of polyacrylonitrile fiber recycled concrete. The results are of great significance in theory and engineering for the application of recycled concrete.

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“…At present, domestic and foreign scholars have mostly constructed constitutive models that can characterize the dynamic damage evolution behavior characteristics of different types of concrete materials by modifying the existing dynamic damage constitutive models of concrete materials and have achieved certain research results 9–13 . For example, Luo 14 modified the strengthening and toughening effect of steel fiber and the strain rate effect on the basis of the original Holmquist–Johnson–Cook (HJC) model to obtain an improved constitutive model of high‐parameter steel fiber‐reinforced concrete that could effectively characterize the dynamic characteristics of steel fiber‐reinforced concrete and confirmed that the reconstruction simulation results were in good agreement with the test results. Dong et al 15 developed a dynamic impact constitutive model based on the modified viscoelasticity and damage theory that can better describe the stress–strain relationship of super‐fine stainless wire (SSW)‐reinforced reactive powder concrete at different strain rates, where the strain threshold is affected by both the strain rate and SSW volume fraction.…”

Section: Introductionmentioning

confidence: 99%

Study on steel fiber synergistically reinforced cellular concrete explosion‐proof effect in an underwater near‐field environment

Cao,

Qiu,

Huang

et al. 2023

Structural Concrete

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Based on the static and dynamic test results of steel fiber synergistically reinforced cellular concrete (SFSRCC) under a complex stress state, the yield surface equation and strain rate effect are modified to construct a modified Holmquist–Johnson–Cook (HJC) model suitable for the dynamic compression behavior characteristics of SFSRCC, and the modified HJC model is verified. At the same time, a finite width SFSRCC protective layer–roller compacted concrete (RCC) slab–water–explosive multimedia coupling model is established to explore the influence of setting different thicknesses of the SFSRCC protective layer (0, 0.1, 0.2, and 0.3 m) on the explosion‐proof performance and effect of the RCC slab structure. The results show that the heavy stress–strain curves and dynamic failure modes of the SFSRCC under different strain rates are in good agreement with the experimental results. The maximum errors of peak stress and peak strain between the simulation results and the experimental results are 1.04% and 6.6%, respectively, which confirms the validity of the HJC correction model and the accuracy of the simulation results. After setting different thicknesses of the protective layer, the RCC slab blast crater depth is reduced by 56.7%, 80%, and 93.3% compared with that at 0.18 m without a protective layer program, and almost no damage to the back explosion surface occurs. The failure volume ratio of the protected RCC slab structure gradually decreases from 38.53% to 3.24% with increasing protective layer thickness, and the protected RCC slab shows only slight damage after setting the protective layer. When the thickness of the protective layer is 0.3 m, the damage of the protected RCC slab structure is distributed in the surface area, which has little effect on the structural safety. These results show that the additional SFSRCC protective layer under the condition of underwater near‐field explosion can significantly reduce the damage degree of the slab structure and improve the explosion‐proof performance of the protected RCC slab structure. This research offers a theoretical reference for the explosion‐proof material selection and design of hydraulic structures and explosion‐proof application of SFSRCC under the action of underwater explosion impact loads.

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Dynamic Constitutive Model Analysis of High Parameter Steel Fiber Reinforced Concrete

Cited by 5 publications

References 25 publications

Experimental Investigation on the Freeze–Thaw Resistance of Steel Fibers Reinforced Rubber Concrete

Experimental Investigation on the Freeze–Thaw Resistance of Steel Fibers Reinforced Rubber Concrete

Polyacrylonitrile Fiber Recycled Concrete Frost Durability Test And Damage Modeling Study

Study on steel fiber synergistically reinforced cellular concrete explosion‐proof effect in an underwater near‐field environment

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