Railway Seismic Resilience Assessment Using Damage Index Correlation
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Solution Overview
Problem
Existing technologies lack a comprehensive system for assessing the seismic resilience of deteriorated railway infrastructure, particularly in urban networks, which are vulnerable due to aging, necessitating a shift from individual facility-based risk management to a network-level resilience assessment.
Innovation Solution
A system and method for assessing seismic resilience of deteriorated railway infrastructure by quantifying resilience through a damage index-based seismic performance assessment, incorporating a disaster/hazard resilience management unit, damage index-based seismic performance assessment unit, and seismic resilience assessment unit to calculate and correlate resilience with urban network performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional individual facility-based risk management is used, then assessment simplicity is maintained, but comprehensive seismic resilience assessment of urban networks cannot be achieved
Solution Approach 1:
The patent segments the complex urban network assessment into three distinct functional units: disaster/hazard resilience management unit, damage index-based seismic performance assessment unit, and seismic resilience assessment unit. Each unit handles specific aspects of the assessment, making the overall complex system manageable through modular organization while achieving comprehensive network-level evaluation.
Solution Approach 2:
The patent introduces a damage index as an intermediary parameter that bridges seismic performance data and resilience assessment. The damage index-based seismic performance assessment unit processes raw seismic data into standardized damage indices, which then serve as inputs for the seismic resilience assessment unit, facilitating integration between different assessment levels.
2Measurement precision
If detailed damage index-based seismic performance assessment is conducted, then measurement precision is improved, but assessment time increases
Solution Approach 1:
The patent performs preliminary damage index calculation and seismic performance assessment before the final resilience evaluation. The damage index-based seismic performance assessment unit pre-processes seismic data and structural responses into standardized damage indices, which are then directly used in the seismic resilience assessment unit, avoiding redundant calculations and reducing overall assessment time while maintaining precision.
Data Source
AI summary
Described are a system and method for assessing seismic resilience of deteriorated railway infrastructure that can assess seismic resilience of railway infrastructure by quantifying resilience according to disaster safety by reflecting a resilience concept of an urban network type and extending to a damage index-based seismic performance assessment based on the quantified resilience, in railway infrastructure such as deteriorated concrete bridges, tunnel structures, and concrete slab tracks, define a correlation between a seismic performance value of deteriorated railway infrastructure and resilience of an urban network by calculating a reliable damage index, quantify and calculate resilience of detailed facilities of the urban network, and link the quantified and calculated resilience with the seismic performance value of the railway infrastructure to calculate a final seismic resilience of the urban network, and furthermore, easily assess resilience of the entire urban network as well as seismic performance/resilience of aged railway infrastructure.