Operationalizing a seismic resilience index for road segments: The case of a road network in Surigao City, Surigao del Norte

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ID: 285130
2023
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Abstract
Vital roads need to be operational most of the time due to its role in providing important access to goods and services, especially during emergencies. In the occurrence of a damaging seismic event, access to roads become more critical due to the need to provide medical and emergency services. Therefore, it is important for roads to be operational and fully restored as quick as possible if rendered inoperable. In view of this, a framework for road segments is proposed, operationalized, and applied to a road network in Surigao City, Surigao del Norte. There is a research gap in the seismic resilience assessment of roads in the country. As such the study fills this gap specifically for pre and post evaluation of road performance after an earthquake. Furthermore, inclusion of network redundancy is included in the study as a step to incorporate road network redundancy in a seismic resilience index. The developed framework for seismic resilience index evaluation considers three properties of resilience: Robustness, Rapidity, and Resourcefulness. Robustness is included by assessing the performance of the road segments by considering loss of functionality and performance impairment due to debris distribution of interfering to the road segments. It is assessed by comparing the load parameter which is the seismic hazard, and the capacity parameter through the developed acceleration threshold equation. Rapidity is considered in the framework by proposing an optimal restoration strategy that determines the minimum volume of debris to regain the functionality of road segments that are rendered inoperable and applying it in the resilience analysis. Resourcefulness is incorporated together with rapidity to generate the rate of debris clearing operations until road is functional for medical emergency response and full road restoration. The seismic hazard of the study is quantified through a Probabilistic Seismic Hazard Analysis (PSHA). The results of PSHA show that the peak ground acceleration (PGA) under a Maximum Considered Earthquake (MCE) Scenario (2% probability of exceedance in 50 years) is 0.55g. Furthermore, a Uniform Hazard Response Spectrum (UHRS) is generated that was subsequently used to simulate artificial earthquakes in SeismoArtif. The performance of the roads is evaluated using an acceleration threshold as a proposed road capacity parameter. This parameter focuses on the performance of roads with respect to the debris distribution of interfering buildings. The proposed acceleration threshold resulted in three cases (Case 1, Case 2, and Case 3). The acceleration threshold and the PGA from PSHA determines
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Authors Fernandez, Cris Angelo Chua
Journal Malay Journal
Year 2023
DOI
DOI not found
URL
https://animorepository.dlsu.edu.ph/etdm_civ/30
Keywords Keywords not found

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