A reliability based measure of structural robustness for coherent systems

Bhattacharya, Baidurya

doi:10.1016/j.strusafe.2020.102050

Cited by 7 publications

(2 citation statements)

References 44 publications

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“…Global variance-based sensitivity analysis is elaborated in [6], in order to study the major sources of uncertainties in the response of RC structures subjected to sudden column removal. A reliability-based index of structural collapse in case of extreme events is computed in [7], for 2D linear elastic truss systems with random strengths and loads. A probabilistic risk assessment is used in [8] to evaluate the risk of terroristic attacks as different blast scenarios involving built infrastructures, studying their effects on structural and load-capacity systems.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Failure Probability of a 2D RC Frame Subjected to Column Loss

Castaldo¹,

Miceli²

2023

J. Mod. Mech. Eng. Technol.

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This study regards the evaluation of the failure probability of a symmetrical 2D reinforced concrete frame composed of 4 spans and 5 floors, in case of an accidental event which causes the central base column loss. The frame is an internal one of a typical building designed in a highly seismic area, characterised by a high ductility class. The frame is modelled in the non-linear finite elements software Atena 2D, accounting for both geometrical and material non-linearities. The uncertainties relevant to the problem are included by sampling both material and action variables, adopting the Latin Hypercube Sampling technique. To compute the failure probability associated to the accidental scenario, two sets of analyses are considered: the first set to compute the capacity of the structure against the column removal by means of displacement-controlled pushdown analysis; the second set to evaluate the demand in terms of external loads, properly combined within the accidental combination according to the codes. The external load is then amplified in order to include the dynamic effects characterising a scenario of a structural member loss. Finally, the probability of the demand exceeding the capacity is evaluated.

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Section: Introductionmentioning

confidence: 99%

Evaluation of the Failure Probability of a 2D RC Frame Subjected to Column Loss

Castaldo¹,

Miceli²

2023

J. Mod. Mech. Eng. Technol.

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“…Graphical interpretation of structural-logical models is the corresponding schemes of functional integrity 22 – 25 , depicted in the form of block diagrams, trees of faults or (and) events, the "bow-tie" techniques, and so on. An algebra of groups of incompatible events in the paradigm of the general logical-probabilistic method 20 , 23 , 24 , 26 has been developed to remove the binary constraint (the stay of the model element in only one of two defined states), characteristic of structural-logical models.…”

Section: Introductionmentioning

confidence: 99%

Reliability model of the security subsystem countering to the impact of typed cyber-physical attacks

Kovtun

Izonin

Greguš

2022

Sci Rep

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The article's main contribution is the description of the process of the security subsystem countering the impact of typed cyber-physical attacks as a model of end states in continuous time. The input parameters of the model are the flow intensities of typed cyber-physical attacks, the flow intensities of possible cyber-immune reactions, and the set of probabilities of neutralization of cyber-physical attacks. The set of admissible states of the info-communication system is described taking into account possible variants of the development of the modeled process. The initial parameters of the model are the probabilities of the studied system in the appropriate states at a particular moment. The dynamics of the info-communication system's life cycle are embodied in the form of a matrix of transient probabilities. The mentioned matrix connects the initial parameters in the form of a system of Chapman's equations. The article presents a computationally efficient concept based on Gershgorin's theorems to solve such a system of equations with given initiating values. Based on the presented scientific results, the article proposes the concept of calculating the time to failure as an indicator of the reliability of the info-communication system operating under the probable impact of typical cyber-physical attacks. The adequacy of the model and concepts presented in the article is proved by comparing a statically representative amount of empirical and simulated data. We emphasize that the main contribution of the research is the description of the process of the security subsystem countering the impact of typed cyber-physical attacks as a model of end states in continuous time. Based on the created model, the concept of computationally efficient solution of Chapman's equation system based on Gershgorin's theorems and calculating time to failure as an indicator of the reliability of the info-communication system operating under the probable impact of typed cyber-physical attacks are formalized. These models and concepts are the highlights of the research.

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System Reliability and New Measure of Robustness of Truss Structure in Progressive Collapse

Baidya

Bhattacharya

2022

Lecture Notes in Mechanical Engineering

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A reliability based measure of structural robustness for coherent systems

Cited by 7 publications

References 44 publications

Evaluation of the Failure Probability of a 2D RC Frame Subjected to Column Loss

Evaluation of the Failure Probability of a 2D RC Frame Subjected to Column Loss

Reliability model of the security subsystem countering to the impact of typed cyber-physical attacks

System Reliability and New Measure of Robustness of Truss Structure in Progressive Collapse

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