Enhancement of Blast Resistance of R.C Beams Using Micro/Nano Silica in Presence of Steel Fibers

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Published Jun 22, 2021
DOI https://doi.org/10.3221/IGF-ESIS.57.19

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Mahmoud Nawar
Zagazig University, Department of Structural Engineering, Egypt.
Kareem El-Awady
Zagazig University, Department of Structural Engineering, Egypt.
Hamdy Shehab
Zagazig University, Department of Structural Engineering, Egypt.
Ahmed Eisa
Zagazig University, Department of Structural Engineering, Egypt.

Abstract

An analytical investigation using ABAQUS/Explicit dynamic analysis was carried out to investigate the effect of using Micro/Nano silica in the presence of steel fibers on improving the dynamic response of reinforced concrete beams. According to the results of Magnusson and Hallgren's experimental investigation, the FE model has been well verified and calibrated. The finite element test program was extended further to study the effect of tensile reinforcement ratio by (0.5%, 0.78%, and 1.13%) comparing with the enhancement of concrete’s material on the behavior of tested R.C beams under blast loading. The results where compared in terms of changes in the max deflection at mid-span and flexural toughness values. The results showed that the combination between the compressive and flexural characteristic of concrete is necessary in case of high steel reinforcement ratio to reduce the brittle behavior of the R.C structure element, especially when the R.C elements exposed to a high strain rate loading due to the addition value of (DIF) for steel reinforcement properties which make the element stiffer than usual, compared with quasi-static loading condition.


           

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    Issue
    Vol. 15 No. 57 (2021): July 2021
    Section
    Impact & Dynamics

    How to Cite

    Nawar, M., El-Awady, K. ., Shehab, H. . and Eisa, A. . (2021) “Enhancement of Blast Resistance of R.C Beams Using Micro/Nano Silica in Presence of Steel Fibers ”, Frattura ed Integrità Strutturale, 15(57), pp. 259–280. doi: 10.3221/IGF-ESIS.57.19.
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