OPTIMUM TIME SPANS OF PREVENTIVE REPLACEMENTS FOR RAILWAY ENGINEERING STRUCTURES
Abstract
As total length of engineering structures within the railway network of Russian Federation exceeds some thousand km, their reliability has a direct impact on the traffic safety.
The reliability and safety of their operation depends on correct maintenance. Two approaches prevail in calculating of time spans of maintenance of a bridge: the permanent one that uses mean values for bridge maintenance works, and the flexible one that uses the results of the assessment of actual state of a bridge. The trend to use the least approach now dominates.
The authors use the method of probabilistic model of a structure as of a complex technical system to forecast the limits of faultless operation. So the control of technical state of engineering structure is considered under the conditions of damage accumulation till the determined level [1–5].
Automation of the control with the help of a specially designed software package permits flexible interventions when the real state of a structure demands replacement or reinforcement works. The model under the study demonstrates the advanced accumulation of damages in one of the bridge span elements and the control of the safety of the whole construction uses two levels of limit states [6].
The programming language for software package is С#. Installation package facilitates the operations assisting to design a new construction or to generate a construction based on standard prototypes.
The software package of computation of optimum time spans for preventive replacements of the elements of engineering structures has some special features: high generality as it fits any kind of engineering structures, interactivity while computing. It conforms to any moment of operation of structures (from the beginning of operation or at any other moment), suits rowing function of failures, considers all possible variants of replacements. It also takes into account different optimization scenarios (minimum visits to the structure, resources saving, climate specific conditions). Invariance as for train types is also of importance.
All the organizations that design or operate railway structures can efficiently use the software.
About the Authors
V. Yu. Smirnov
Moscow State University of Railway Engineering (MIIT), Moscow
Russian Federation
Ph.D. (Tech), associate professor of the department of automated design engineering systems of transport facilities and structures
Russian Federation
Ph.D. (Tech), associate professor of the department of automated design engineering systems of transport facilities and structures
O. I. Kos
Moscow State University of Railway Engineering (MIIT), Moscow
Russian Federation
Ph.D. student
Russian Federation
Ph.D. student
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Review
For citations:
Smirnov V.Yu., Kos O.I. OPTIMUM TIME SPANS OF PREVENTIVE REPLACEMENTS FOR RAILWAY ENGINEERING STRUCTURES. World of Transport and Transportation. 2013;(1):152-155. (In Russ.)
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