Determination of blast resistance of selected structural elements

Ivančo, Matúš; Trajkovski, Jovan; Figuli, Lucia; Erdélyiová, Romana

doi:10.1051/matecconf/202031300026

Cited by 5 publications

(3 citation statements)

References 12 publications

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“…However, the charge would have to contain an amount of explosive corresponding to the distance between the site of the explosion and the element being destroyed [41,42]. Pressure wave generated in explosion would damage objects/elements around the source of explosion [43]. Such an attack would be ostentatious and unlikely given the possible extent of the damage.…”

Section: The Mutual Arrangement Of the Charge And Of The Material/element To Be Overcome Speaks Of The Position Of The Charge Relative Tomentioning

confidence: 99%

Evaluation Process of the Burglary Resistance When Explosives Are Used to Create an Opening in the Barriers

2021

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Burglary resistance expresses the time required to overcome the barriers to cause the damage in order to unlawfully enter a place for the purposes of stealing property or committing a felony (i.e., disruption of important assets, e.g., critical infrastructure). Damage to the object protection system means damage to the symmetry of the system—the balance between protection measures and security threats. Barriers are considered to be the walls of buildings or secure storage units (safe, safe, etc.), i.e., passive barriers that separate asset (protected value) from the security threat. The role of barriers in the security system is also to slow down the attack and create a time reserve for the intervention of a security service. There is no uniform approach to express the burglary resistance of such barriers using explosives; however, burglary by explosion are present. Explosives in the article are a tool that can be used by the offenders. The article uses mainly Delphi method and Saaty method. These methods have made it possible to identify and expertly evaluate scenarios for the use of explosives to break a barrier. Logical methods and interviews were also used. The result of the article is the identification and evaluation of the possibilities of using explosives to overcome barriers and expressing the blast burglary resistance of barriers. The universal assessment approach allows the inclusion of explosives to the burglary resistance protection system assessment schemes.

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Section: The Mutual Arrangement Of the Charge And Of The Material/element To Be Overcome Speaks Of The Position Of The Charge Relative Tomentioning

confidence: 99%

Evaluation Process of the Burglary Resistance When Explosives Are Used to Create an Opening in the Barriers

2021

Self Cite

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“…The effect of explosives on the assets and the surrounding environment is a complex topic, which is devoted to many scientific and professional publications [11], [12], [13]. To express these effects in detail, it is necessary to know the processes during the explosion, as well as the characteristics of the destroyed assets and the characteristics of the used explosive charge, in details studied in [14], [15] and [16]. The following factors affect the assessment of the effects of an explosion: -Characteristics of the destroyed material/destroyed asset ( type of material, dimensions etc.).…”

Section: Factors Influencing the Effect Of An Explosionmentioning

confidence: 99%

Explosives and burglary resistance of barriers. Determination of burglary resistance factors

Zvaková

Boroš

2021

MATEC Web Conf.

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The explosion has various effects on its environment. The barriers, unless there is a requirement, are not designed for the specific blast load. There are currently no technical standards that regulate the resistance of commonly used elements of mechanical barriers exposed to a blastwave. Current technical standards focus on the resistance of certain elements, structurally made in a way to improve their resistance against the effect of explosions. These technical standards are used to certify elements into various classes of blast resistance. The paper is focused on the problem of determining the burglary resistance factors when explosives are used to overcome the mentioned barriers.

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“…This hypothesis is only correct for normal use of the structure; however, this is not the case under extreme loads (fire or explosion). In extreme loads [7], the structure tests the structure itself to the limit of its load-bearing capacity, or if locally, even exceeds this limit and thus reveals all its weak points, which are the spacers. An example of an experiment carried out where this problem was captured is the subject of this paper.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Bottom Reinforcement Spacers on Reinforced Concrete Structures Loaded by Explosion

Zezulová,

Dubec,

Dvořák

et al. 2023

Buildings

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Plastic spacers create a linear and systemic weakening of the structure. The extreme loading of the structure tests the structure itself to its load-bearing limit or even locally exceeds this limit, thus revealing all its weak points, which are the spacers. Nevertheless, the influence of the spacers is not included in the design calculation of the reinforced concrete element. In addition, products intended as spacers for the placement of reinforcement do not belong to the specific families of construction products covered by a harmonized standard of European parliament regulation. For these reasons, it is not required to demonstrate any characteristics of these products. This fact allows the use of arbitrary spacers’ shapes and materials. As shown by the experiment carried out, the use of commonly used plastic liners will result in a weakening of the cross-section. The normal assessment of the ultimate or serviceability limit state is not affected by this weakening. An example of an experiment carried out where this problem was captured is the subject of this paper. With Europe’s current deteriorated safety situation, understanding the influence of spacers in blast-loaded reinforced concrete structures on structural failure is important, and it is appropriate to further address this issue. Based on this experiment, it is not possible to accurately identify the causes of the explosion cracks. In order to determine with certainty the effect of spacers on the strength of the structure under abnormal blast loadings, research needs to focus on this area. In the field experimental measurements and numerical simulations, it was found that the use of linear spacers has an effect on crack formation under the blast action of the tested slab.

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Determination of blast resistance of selected structural elements

Cited by 5 publications

References 12 publications

Evaluation Process of the Burglary Resistance When Explosives Are Used to Create an Opening in the Barriers

Evaluation Process of the Burglary Resistance When Explosives Are Used to Create an Opening in the Barriers

Explosives and burglary resistance of barriers. Determination of burglary resistance factors

The Effect of Bottom Reinforcement Spacers on Reinforced Concrete Structures Loaded by Explosion

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