Risk assessment for the hazard scenario ""Braking action on double track railway bridges""

2011 ◽  
pp. 1982-1990
Author(s):  
C Fermaud ◽  
F Stenger ◽  
V Malioka ◽  
M Schenkel
Keyword(s):  
Risk Assessment ◽  
Railway Bridges ◽  
Hazard Scenario ◽  
Double Track

Robust Output Only Health Monitoring of Steel Railway Bridges

2020 ◽  
pp. 24-41
Author(s):  
Ahmed Rageh ◽  
Daniel Linzell ◽  
Samantha Lopez ◽  
Saeed Eftekhar Azam
Keyword(s):  
Health Monitoring ◽  
Three Dimensional ◽  
Supervised Machine Learning ◽  
Damage Scenario ◽  
Railway Bridges ◽  
Bridge Span ◽  
Structural Responses ◽  
Girder Bridge ◽  
Output Only ◽  
Double Track

This chapter extends application of a framework proposed by the authors (73, 74) for automated damage detection using strain measurements to study feasibility of using sensors that can measure accelerations, tilts, and displacements. The study utilized three-dimensional (3D) finite element models of double track, riveted, steel truss span, and girder bridge span under routine train loads. The chapter also includes three instrumentation schemes for each bridge span (65) to investigate the applicability of the framework to other bridge systems and sensor networks. Connection damage was simulated by reducing rotational spring stiffness at member ends and various responses were extracted for each damage scenario. The methodology utilizes Supervised Machine Learning to automatically determine damage location (DL) and intensity (DI). Simulated experiments showed that DLs and DIs were detected accurately for both spans with various structural responses and using different instrumentation plans.

Risk Assessment of a Railway Bridge Subjected to a Multi-hazard Scenario

2021 ◽  
pp. 661-672
Author(s):  
João Fernandes ◽  
Monica Santamaria ◽  
José C. Matos ◽  
Daniel V. Oliveira ◽  
António Abel Henriques
Keyword(s):  
Risk Assessment ◽  
Railway Bridge ◽  
Hazard Scenario

Prioritization of hazards for risk and resilience management through elicitation of expert judgement

2021 ◽  
Author(s):  
ioanna ioannou ◽  
Jaime Cadena Gomez ◽  
Willy Aspinall ◽  
David Lange ◽  
Daniel Honfi ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Paired Comparison ◽  
Time Frame ◽  
Expert Elicitation ◽  
Risk And Resilience ◽  
Mathematical Technique ◽  
Novel Approach ◽  
Resilience Management ◽  
Hazard Scenario

Abstract Risk assessment in communities or regions typically relies on the determination of hazard scenarios and an evaluation of their impact on local systems and structures. One of the challenges of risk assessment for infrastructure operators is how to identify the most critical scenarios that are likely to represent unacceptable risks to such assets in a given time frame. This study develops a novel approach for prioritizing hazards for the risk assessment of infrastructure. Central to the proposed methodology is an expert elicitation technique termed paired comparison which is based on a formal mathematical technique for quantifying the range and variance in the judgements of a group of stakeholders. The methodology is applied here to identify and rank natural and operational hazard scenarios that could cause serious disruption or have disastrous effects to the infrastructure in the transnational Øresund region over a period of five years. The application highlighted substantial divergences of views among the stakeholders on identifying a single ‘most critical’ natural or operational hazard scenario. Despite these differences, it was possible to flag up certain cases as critical among the natural hazard scenarios, and others among the operational hazards.

scholarly journals Planning for resilience of water networks under earthquake hazard

2021 ◽  
Vol 54 (2) ◽  
pp. 135-152
Author(s):  
S R Uma ◽  
Finn Scheele ◽  
Elizabeth Abbott ◽  
Jose Moratalla
Keyword(s):  
Risk Assessment ◽  
Damage Identification ◽  
Critical Infrastructure ◽  
Earthquake Hazard ◽  
Water Networks ◽  
Water Network ◽  
Science Models ◽  
Hazard Scenario ◽  
The Impact

Water networks are vulnerable to earthquakes and failures of network components can result in a lack of availability of services, sometimes leading to relocation of the community. In New Zealand, there are statutory requirements for the water network providers to address the resilience of infrastructure assets. This is done by identifying and managing risks related to natural hazards and planning for appropriate financial provision to manage those risks. In addition to this, the impact from the Canterbury region earthquakes has accelerated the need for understanding the potential risk to critical infrastructure networks to minimise socio-economic impact. As such, there is a need for developing pragmatic approaches to deliver appropriate hazard and risk information to the stakeholders. Within the context of improving resilience for water networks, this study presents a transparent and staged approach to risk assessment by adopting three significant steps: (i) to define an earthquake hazard scenario for which the impact needs to be assessed and managed; (ii) to identify vulnerable parts of the network components; and (iii) to estimate likely outage time of services in the areas of interest. The above process is illustrated through a case study with water supply and wastewater networks of Rotorua Lakes Council by estimating ground motion intensities, damage identification and outage modelling affected by number of crews and preferred repair strategies. This case study sets an example by which other councils and/or water network managers could undertake risk assessment studies underpinned by science models and develop resilience management plans.

Sign in / Sign up

Export Citation Format

Share Document