Location and mass of explosive from structural damage

Luccioni, Bibiana; Jacinto, Abel Carlos; Danesi, Rodolfo

doi:10.1016/j.engstruct.2004.09.003

Cited by 40 publications

(27 citation statements)

References 9 publications

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“…pressure-impulse curves corresponding to different damage level) are widely used (Ambrosini et al, 2005). Each P-I curve represents different combinations of pressure and impulse (time integral of pressure) that would produce the same level of damage within a structural element (Baker et al, 1983).…”

Section: Blast Mechanism and Propertiesmentioning

confidence: 99%

Critical overview of blast resistance of different concrete types

Alhadid

Soliman

Nehdi

et al. 2014

Magazine of Concrete Research

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Past attacks against buildings and civil infrastructure highlight the need for blast-resistant structural materials.Numerous studies have been conducted on various related techniques and some design guidance has been developed to increase the resistance of structures to blast loading. Generally, a blast results in a high-amplitude impulse loading typically with a very short duration. Hence, the material's response to such loading will differ from its response to regular types of loading. Consequently, the analysis and design of structures subjected to blast loads require a full understanding of the behaviour of materials and structural elements under blast loading. This paper presents an overview of the behaviour of concrete elements subjected to blast loads. A critical discussion of the state of the art on blast resistance of conventional and modern concrete materials is provided, along with an overview of effective retrofitting and strengthening techniques.

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Section: Blast Mechanism and Propertiesmentioning

confidence: 99%

Critical overview of blast resistance of different concrete types

Alhadid

Soliman

Nehdi

et al. 2014

Magazine of Concrete Research

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“…The blast wave simulation techniques already have achieved a relative degree of success, although they still have a ways to go in order to attain a satisfactory level of maturation in terms of dependability, accuracy and reliability at a reasonable numerical cost. In fact the simulations performed by Zhou et al [4], Ambrosini et al [6] and Sklavounos et al [7], for instance, show that -because of both hardware and software capacityreducing the mesh size in order to improve the solution estimation was not possible.…”

Section: A C C E P T E D Article In Pressmentioning

confidence: 99%

“…First, finely discretizing the three-dimensional domain implies a huge mesh, so much so that conventional computer resources, especially memory resources, would hardly be sufficient to handle the calculation. Second, according to relation (6), the combination of a small mesh cell size and the high velocity involved at the blast onset gives rise to extremely small time steps, and consequently the computation time would be unreasonably long. In either case, accurate simulation would be practically unaffordable.…”

Section: Initial Conditions and The Remapping Algorithmmentioning

confidence: 99%

“…Alternatively, using iso-damage diagrams, which have been widely discussed in the literature [9,10], looks to be a more attractive and practical way to correlate pressure and impulse to the damage produced in the various parts of the structures. In this study, the theoretical single-degreeof-freedom approach was used because of its high level of confidence, instead of the original iso-damage pressure-impulse diagrams [6,11].…”

Section: A C C E P T E D Article In Pressmentioning

confidence: 99%

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Prediction of blast wave effects on a developed site

Benselama

William-Louis

Monnoyer

2010

International Journal of Impact Engineering

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The guidelines for protecting against and mitigating explosion hazards require knowledge and either the experimental or theoretical evaluation of blast wave parameters. To this end, this article proposes a numerical method for simulating blast wave propagation in complex geometries. This method permits an on-the-ground TNT-like explosion and the subsequent blast wave to be simulated, with the possibility of modifying the ground topology by adding a number of obstacles. The numerical model is explored from both a qualitative and quantitative point of view by comparing it to experimental data, with a correct determination of the wave amplitude and phase signature at different key-positions. The pressure and Mach number distributions deduced from simulations in complex congested areas highlight various fluidsolid interactions, such as regular reflections and diffractions. The iso-damage diagrams of different obstacle layouts are also presented and discussed.Key words: Blast loading, Semi-confined environment, Iso-damage diagram, Finite volume method, Cartesian mesh PACS: 47.40. Rs, 62.20 .D- NomenclatureGreek Symbols ∆p overpressure, ∆p = p − p ref (P a) ∆x specific length of the current three-dimensional mesh cell γ heat capacity ratio of the perfect gas * Corresponding author.

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“…In a design or analysis procedure, normally the dynamic loading (pressure and impulse) is determined by these two parameters, and then the response of the structure can be analyzed. In association with the pressure and impulse, the widely used way to assess structure damage is P-I curve (Pressure-impulse curves corresponding to different damage level) (Ambrosini et al 2005). A P-I curve can be obtained from a simple SDOF analysis, complicated numerical simulations (Lan and Crawford 2003), or field blast tests.…”

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confidence: 99%

Numerical Prediction of Reinforced Concrete Exterior Wall Response to Blast Loading

Zhou

Hao

2008

Advances in Structural Engineering

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It is of interest to know the response of the unretrofitted reinforced concrete exterior walls under blast loading because some infrastructures might be targets of terrorist attack. Detailed numerical simulation and analysis of a typical concrete wall under different blast loads is presented in this study. The concrete material model used in the study includes a dynamic plastic damage model, a modified damage dependent piece-wise Drucker-Prager strength envelope, and a nonlinear equation of state considering the heterogeneity and porosity of concrete materials. The strain rate effect on tensile and compressive strength is considered separately. The concrete damage is based on Mazars' damage model, which combines tensile and compressive damage. The present numerical model was calibrated first by comparing the numerical results with laboratory blast test results of reinforced concrete slabs. The calibrated model is then employed to simulate the response of a typical reinforced concrete exterior wall under blast loads. TNT charge weights corresponding to some typical terrorist bombs, that is, from 10kg to 5000kg, are considered. In terms of different TNT charge weights, the responses of the reinforced concrete wall at different stand-off distances are simulated. Based on the numerical results, critical curves that relate damage levels with the explosion conditions are derived. The safe stand-off distances to resist different terrorist bombing scenarios are suggested.

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Location and mass of explosive from structural damage

Cited by 40 publications

References 9 publications

Critical overview of blast resistance of different concrete types

Critical overview of blast resistance of different concrete types

Prediction of blast wave effects on a developed site

Numerical Prediction of Reinforced Concrete Exterior Wall Response to Blast Loading

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