Experimental and Numerical Assessment of Fibre Reinforced Concrete Slab under Blast Load

Dubec, Branislav; Manas, Pavel; Štoller, Jiří; Stonis, Patrik

doi:10.1109/miltechs.2019.8870129

Cited by 4 publications

(2 citation statements)

References 3 publications

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“…Several concrete structures exposed to blast loading have been modelled, e.g. by Tai et al [10]; Zhao and Chen [11,12], Thiagarajan et al [13]; Dubec, Maňas, Štoller and Stonis [14]. In this study however, a numerical analysis of one of the physical experiments conducted by Feng et al [15], who experimentally investigated the response of one-way concrete slab reinforced by basalt fibre reinforced plastic (BFRP) under close-in TNT explosion, has been conducted.…”

Section: Introduction and Methodsmentioning

confidence: 99%

Numerical Analysis of BFRP Reinforced Concrete Slab Exposed to Impact Loads

Jindra

Hradil²

2022

CEJ

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This paper describes advanced numerical analysis of a simply supported reinforced concrete slab exposed to close range explosion of a TNT charge. Finite element method (FEM) has been utilized in order to conduct the analysis. Non-linear material model for concrete slab is adopted. Reinforcing bars made of basalt fibre reinforced plastic (BFRP) are considered by elastic-plastic material model. 3D numerical model has been created, and a software with explicit solver (LS-Dyna) has been used in order to conduct analyses. A simplified modelling method of the blast loading has been utilized, which is based on the consideration of the load effects as a time dependent pressure. Several cases with different mesh size or different finite element formulation are investigated. The results are compared with experimental data based on study of fellow researchers. Match between the numerical analyses and measurements is discussed and considered as satisfying.

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Section: Introduction and Methodsmentioning

confidence: 99%

Numerical Analysis of BFRP Reinforced Concrete Slab Exposed to Impact Loads

Jindra

Hradil²

2022

CEJ

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“…Concrete structures exposed to blast loading has been studied e.g. by Tai et al [20], Zhao and Chen [21], [22], Thiagarajan et al [23] and Dubec, et al [24]. The phenomena of structural response under high velocity impact loads is still object of continuous research.…”

Section: Introductionmentioning

confidence: 99%

Finite element analysis of concrete slab exposed to high velocity pressure wave – simplified vs. smoothed-particle hydrodynamics (SPH) method

Jindra,

Hradil,

Kala

2024

MATEC Web Conf.

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Many structures are required to sustain the structural resistance also under extreme loading conditions, for example impacts of high-velocity objects (airplane crash into nuclear power plant), impacts of projectiles (defence structures), or while exposed to high velocity pressure wave caused e.g. by explosion of various chemicals in industry, nature gas, or also conventional weapons. Numerical analyses of these phenomena are feasible while utilizing explicit approach of the finite element method (FEM), available in commercially accessible software LS-Dyna. In order to predict the behaviour of the structure properly, advanced nonlinear material models are required to be considered, which are often mathematically described by numerous input parameters. Several approaches to model the exposure to blast load exist, from simplified, where the blast wave is considered as timedependent pressure based on empirical equations, to more advanced ones, where the propagation of the pressure wave itself through the surrounding environment is being modelled Arbitrary Lagrangian Eulerian, (ALE method), or so called smoothed-particle hydrodynamics (SPH) method, which might be used to model the blast itself. In this paper, FEM analyses of a simply supported concrete slab with basalt fibre reinforced polymer (BFRP) bars exposed to close range explosion of TNT charge are presented. 3D numerical models are analysed utilizing explicit solver of LS-Dyna. Karagozian and Case (K&C) nonlinear material model for concrete is used, which is suitable when high strain rates are present in the quasi brittle materials. Two variants of the blast loads modelling are compared. The simplified empirical approach, which is less demanding on computational power, and feasible for utilization in case of simple structure geometry, and more demanding method using SPH method to model the TNT detonation and interaction with the exposed concrete slab. The results of these numerical analyses are compared with experimental data based on available literature, and properly discussed.

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Numerická analýza rázovo zaťaženej betónovej dosky s BFRP výstužou

Jindra¹,

Hradil²

2022

Juniorstav

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Článok popisuje numerickú analýzu s využitím MKP jednoducho uloženej betónovej dosky zaťaženej rázovou vlnou od blízkeho výbuchu TNT nálože. Prúty výstuže dosky obsahujú bazaltové vlákna. Je vytvorený 3D numerický konečnoprvkový model a na analýzu je použitý software s explicitným riešičom. Na účely modelovania účinkov rázového zaťaženia od tlakovej vlny je použitá zjednodušená metóda. Sú porovnané viaceré prípady s rôznymi veľkosťami siete, formuláciou konečných prvkov. Výsledky sú porovnávané s experimentálnymi dátami.

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Experimental and Numerical Assessment of Fibre Reinforced Concrete Slab under Blast Load

Cited by 4 publications

References 3 publications

Numerical Analysis of BFRP Reinforced Concrete Slab Exposed to Impact Loads

Numerical Analysis of BFRP Reinforced Concrete Slab Exposed to Impact Loads

Finite element analysis of concrete slab exposed to high velocity pressure wave – simplified vs. smoothed-particle hydrodynamics (SPH) method

Numerická analýza rázovo zaťaženej betónovej dosky s BFRP výstužou

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