Analysis of the blast wave decay coefficient using the Kingery–Bulmash data

Karlos, Vasilis; Solomos, George; Larcher, Martin

doi:10.1177/2041419616659572

Cited by 64 publications

(62 citation statements)

References 27 publications

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“…In this study, we used a localized blast load developed by Friedlander, with the positive phase using an exponential function and the negative phase using the cubic negative phase developed by Ganstrӧm [13]. Rigby et al [14] showed that for the negative phase of a Friedlander load, the cubic negative phase approach yields the most accurate results.…”

Section: Resultsmentioning

confidence: 99%

Numerical Analysis of a Friedlander Localized Blast Load on a Rigid Roadway Pavement Using Levy’s Problem

Alisjahbana¹,

Asmi²,

Safrilah³

et al. 2020

Int. J. Adv. Sci. Eng. Inf. Technol.

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The increasing number of terrorist attacks in recent years have shown that in designing structures such as floor slabs and rigid roadway pavement, the effect of blast loads should be taken into consideration. In this study, we analyze the blasting effect on the rigid roadway pavements and provide a numerical example of a toll road shoulder section exposed to this blast load. We assumed that the rigid roadway slab is connected by dowels and tie-bars along its edges. Furthermore, we modeled the blast as a Friedlander blast load, where it is initially a positive pressure before decreasing to a negative pressure due to drag. We obtained the vertical shear force that is carried by the dowels and tie-bars along its edges, the time history of the rigid roadway slab deflection, and identified the parameters of the sub-grade that has significant effects on the dynamic response of the rigid roadway pavement. We carried out the numerical analysis using the first and the second type of Levy's problem to find the Eigenvalues and Eigenvectors and to predict the maximum deformed shape, the maximum vertical shear forces along the joint of the rigid roadway pavement subjected to the blast load. Our results show that the duration ratio of the blast loading, the thickness of the slab, and the stiffness coefficient of the soil has a significant influence on the dynamic response of the slab. This paper provides essential techniques in increasing the capacity of a rigid roadway slab against explosive effects.

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Section: Resultsmentioning

confidence: 99%

Numerical Analysis of a Friedlander Localized Blast Load on a Rigid Roadway Pavement Using Levy’s Problem

Alisjahbana¹,

Asmi²,

Safrilah³

et al. 2020

Int. J. Adv. Sci. Eng. Inf. Technol.

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“…) . e ( 1)Pe is effective pressure, P0 is the atmospheric pressure, Pso is the peak positive pressure, t is current time and td is time duration of positive pressure (Karlos et al, 2015).…”

Section: Load Blast Enhanced (Lbe) Methodsmentioning

confidence: 99%

Patlama Yükleri Altında Güçlendirilmiş Çift Perde Yapısının Dinamik Analizi

Ocaktan¹,

Demir²

2020

European Journal of Science and Technology

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The set of the construction elements which are designed to divide the boat structure into compartments and enable the maintenance of the balance of the boat by keeping the water entering the hull in a certain region in case of any damage is called watertight bulkhead. The main factor taken into consideration while determining the number of watertight bulkheads and their structural strength properties is to protect the stability of the ship in case of filling with water after a collision and to ensure that the bulkhead has a resistance level that can endure this water pressure. In warships, these bulkheads can be used for other purposes and may be exposed to a number of military loads in addition to operational loads. This study examines the reinforced watertight double bulkhead structure designed to reduce the effects of blast caused by the explosion in the compartment after the weapon hit on warships and fragmentation effects only under blast loads.

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“…There exist numerous manuals, relationships and graphs for calculating the generated blast load after an explosion. A comparison among the various available relationships for the main blast parameters [19] has revealed considerable differences in the proposed values. The most widely accepted approach appears to be that of Kingery and Bulmash [20], as it includes polynomial relationships for calculating the main parameters for both incident and reflected blast waves of spherical and hemispherical bursts.…”

Section: Distribution Of Uncertaintiesmentioning

confidence: 99%

“…The most widely accepted approach appears to be that of Kingery and Bulmash [20], as it includes polynomial relationships for calculating the main parameters for both incident and reflected blast waves of spherical and hemispherical bursts. By using these parameters in a deterministic manner, the large uncertainties that characterize the extreme nature of explosions are neglected, and this is not always on the conservative side [19]. If, on the other hand, a probabilistic risk assessment methodology in the design of new and existing engineering structures is followed, the quantification of the uncertainty in the calculation of the blast parameters is required.…”

Section: Distribution Of Uncertaintiesmentioning

confidence: 99%

15.10: Probabilistic analysis of steel columns under blast induced loads

2017

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A growing interest for the design of structures to sustain blast induced loads has been observed in recent years due to the worldwide rise of terrorist bombing attacks. The blast parameters that are essential for design can be located in various publically available blast design manuals, where the proposed graphs and equations are based on a large experimental database established several decades ago. The degree of uncertainty in the determination of these parameters is significant, as a result of the unstable nature of explosives, the efficiency of the measuring equipment and the large pressure and impulse values involved in the blast phenomena. These uncertainties have been identified in the current study which focuses on the response of steel open sections under blast induced loads and addresses the influence of such uncertainties on the flexural response of axially loaded structural members. The variation of structural and load parameters was considered in the design procedure by utilizing a reliability-based assessment methodology. A probabilistic approach was followed and the reliability of the column was defined with respect to limit states proposed in various blast design manuals. Probability curves are constructed, by using single-degree-of-freedom models, showing the cumulative probability distribution of reaching a certain capacity with respect to a selected limit state. This way instead of a deterministic safe-unsafe criterion in design, the probability of damage is introduced in relation to the applied axial load, which provides a valuable insight to the behaviour of structural members subjected to an explosion.

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Analysis of the blast wave decay coefficient using the Kingery–Bulmash data

Cited by 64 publications

References 27 publications

Numerical Analysis of a Friedlander Localized Blast Load on a Rigid Roadway Pavement Using Levy’s Problem

Numerical Analysis of a Friedlander Localized Blast Load on a Rigid Roadway Pavement Using Levy’s Problem

Patlama Yükleri Altında Güçlendirilmiş Çift Perde Yapısının Dinamik Analizi

15.10: Probabilistic analysis of steel columns under blast induced loads

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