Initial Investigations into the Use of Three Heuristic Algorithms to Determine Optimal Intervention Programs for Multiple Railway Objects

Mizutani, Daijiro; Burkhalter, Marcel; Adey, Bryan T.; Martani, Claudio; Ramdas, V. Saradha

doi:10.7492/ijaec.2017.013

Cited by 3 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Probabilistic safety analysis of railway lines implies a huge amount of combinations of events (see, for example, [8], [9]). Though fault trees structures (see [10] or [11]) are the most common probabilistic models used in PSA, they have important limitations, specially to consider common causes.…”

Section: Introductionmentioning

confidence: 99%

Probabilistic Safety Analysis of Railway Lines

Castillo¹,

Grande²,

Calviño³

et al. 2018

Int J Railw Tech

View full text Add to dashboard Cite

A new probabilistic safety assessment method applicable to conventional and high speed railway lines is presented. The main idea consists of reproducing the railway line items which are relevant to safety by means of a Bayesian network as an alternative to more limited event and fault tree structures. The model evaluates the probability of incidents associated with the circulation of trains along the lines with special consideration of human errors. To this end, all the line relevant elements, such as light and speed limit signals, rolling stock failures, falling materials, slope slides in cuttings and embankments, tunnel or viaduct entries or exits, automatic train protection systems and other elements are reproduced with a special consideration of human behavior and human error. Since driver's attention plays a crucial role, its evolution and changes with driving time and due to other factors, such as seeing light signals or receiving acoustic signals are taken into account. The model updates the driver attention level and evaluates the probability of accident associated with the different elements encountered along the line. A continuously increasing risk graph with continuous and sudden changes is obtained indicating where actions must be taken to improve safety. This avoids waste of time and money by concentrating on the items most critical to safety. Finally, some illustrative examples are used to point out the models relevance.

show abstract

Section: Introductionmentioning

confidence: 99%

Probabilistic Safety Analysis of Railway Lines

Castillo¹,

Grande²,

Calviño³

et al. 2018

Int J Railw Tech

View full text Add to dashboard Cite

show abstract

Variability in an Optimal Infrastructure Management Policy by Internalization of Seismic Risk

Mizutani¹

2018

JDR

View full text Add to dashboard Cite

During recent years, the possibility that damage at the time of earthquake could change depending on the deterioration condition of infrastructure has been noted through analytical analyses. Faced with such a possibility, management policy should be optimized by internalizing the external elements of earthquake damage, evaluating the appropriateness of management policy for infrastructure, and optimizing the system. In this study, the deterioration process for infrastructure was modelled using the Markov process model, and a methodology to determine the optimal management policy is proposed by considering the two risks: i) the risk that infrastructure fails because of deterioration independent of external elements such as an earthquake, and ii) the risk that changes due to deterioration fails the infrastructure at the time of earthquake. Using an example of the application the following two points are demonstratively shown: i) the optimal management policy would change in the case in which earthquake risk is not considered, and ii) the optimal management policy would change depending on the earthquake occurrence probability in the case in which earthquake risk is considered.

show abstract

State-of-the-Art in Asset Management Research: Statistical Deterioration Forecasting and Optimisation of Management Policies

Mizutani¹

2021

J. JSCE, Ser. D3

View full text Add to dashboard Cite

Initial Investigations into the Use of Three Heuristic Algorithms to Determine Optimal Intervention Programs for Multiple Railway Objects

Cited by 3 publications

References 0 publications

Probabilistic Safety Analysis of Railway Lines

Probabilistic Safety Analysis of Railway Lines

Variability in an Optimal Infrastructure Management Policy by Internalization of Seismic Risk

State-of-the-Art in Asset Management Research: Statistical Deterioration Forecasting and Optimisation of Management Policies

Contact Info

Product

Resources

About