Dynamic loads during failure risk assessment of bridge crane structures

Gorynin, A D; Antsev, V.Yu.; SHAFOROST, ALEXANDR

doi:10.1088/1757-899x/327/4/042040

Cited by 8 publications

(2 citation statements)

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“…The experience of operation of transport and reloading equipment of various types shows that despite the planned repairs, during operation, accidental failures of individual structural elements are observed, leading to the impossibility of further operation of the equipment as a whole [18].…”

Section: Setting a Research Taskmentioning

confidence: 99%

Optimal planning of the mobile cargo ropeway repair strategy

Lagerev

2023

Int J Syst Assur Eng Manag

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The focus of this research is to increase the reliability of mobile cargo ropeways formed by autonomous selfpropelled transport units. The article deals with the development of a method for forming an effective technical and economic strategy for the restoration during planned repairs of those structural elements of transport units that can lead to critical failures of the ropeway. The method involves predicting the kinetics of the probability of failure-free operation of the ropeway during the entire life of its operation on the basis of predicting the failure-free operation of key elements of the transport units, the failure of which leads to an emergency disruption of the ropeway. In the process of integrating the system of Chapman-Kolmogorov differential equations, its periodic reformation is performed at the time of planned repairs, which allows us to take into account the need for a discrete change in the probability of failure-free operation of the restored structural elements. As a criterion for the optimality of the repairs strategy, the condition for obtaining the minimum total cost of repairs is used, while ensuring the average probability of failure-free operation. The formation of such an optimal strategy includes planning the schedules, number, time points, volume and cost of restoration work. The effectiveness of the repair strategy is determined by the total number of planned repairs and the minimum permissible probability of critical failure of structural elements. Conditions have been established under which further improvement of the level of ropeway reliability becomes an economically unprofitable task.

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Section: Setting a Research Taskmentioning

confidence: 99%

Optimal planning of the mobile cargo ropeway repair strategy

Lagerev

2023

Int J Syst Assur Eng Manag

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“…The uniqueness conditions necessary for solving the system of differential equations of convective heat transfer are defined in [22][23][24][25][26][27].…”

Section: Fourier-kirchhoff Differential Equationmentioning

confidence: 99%

Thermal conditions of load-bearing elements of radioactive waste storage facilities

2020

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Facilities for storing radioactive waste with residual heat differ from other facilities in high safety standards in all operating conditions. A feature of these structures is the presence of biological protection in the form of walls and ceilings made of reinforced concrete with a large thickness. The combination of heat dissipation and the large thickness of walls and floors create conditions for the appearance of significant thermal stresses. This feature should be taken into account in the strength calculations of these buildings, taking into account the summation of seismic effects, gravitational forces and thermal stresses caused by uneven temperature fields in concrete. The paper presents the results of calculations of the combined effects of thermal stresses and earthquakes on a building. The data obtained made it possible to determine the features of the deformation of concrete structures with a combination of loads.

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