Abstract
The assessment of bridge functionality during earthquakes is fundamental in the evaluation of emergency response and socio-economic recovery procedures. In this regard, resilience may be considered a key parameter for decision-making procedures such as post-hazard event mitigations and recovery investments on bridges. The paper proposes a case study of a bridge configuration subjected to seismic hazard and aims to consider the effects of the soil–structure interaction on the recovery to various levels of pre-earthquake functionality. The principal outcome of the paper consists of calculating resilience as a readable finding that may have many applications for a wide range of stakeholders, such as bridge owners, transportation authorities and public administrators who can apply the outcomes in the assessment of the best recovery techniques and solutions.
Highlights
Resilience from natural disasters has becoming a relevant issue for civil communities that rely on bridges, being significantly exposed to natural disasters, such as earthquakes and quantitative estimations of seismic resilience are fundamental to define pre- and post-earthquake decision-making procedures
The present paper aims to contribute by performing the procedure proposed by [5] to study the effects of soil–structure interaction (SSI) on the seismic resilience of a bridge configuration
Resilience is defined by the rapidity for a system to return to pre-disaster levels of performance and can be calculated as follows: t0E+RT Q(t) where, t0E is the time of occurrence of the event E, RT is the repair time necessary to restore the functionality of the bridge and it is calculated with the performance-based earthquake engineering (PBEE) methodology, as shown
Summary
Resilience from natural disasters has becoming a relevant issue for civil communities that rely on bridges, being significantly exposed to natural disasters, such as earthquakes and quantitative estimations of seismic resilience are fundamental to define pre- and post-earthquake decision-making procedures. The framework of [22] was applied for time-variant loss and resilience assessment of Californian highway bridges under time-dependent multiple hazards Against this background, [23] compared the performance of several isolated bridge configurations under soil–structure interaction (SSI) effects, by applying the performance-based earthquake engineering (PBEE) methodology to calculate repair costs without quantifying resilience. Following the first attempt by [24], the paper has several elements of novelty: (1) it aims to overcome the lack of bridge resilience assessments necessary for investments, decision-making procedures and pre- and post-hazard risk mitigations; (2) the role of SSI is here investigated with a new approach based on quantification of resilience; and (3) the presented outputs may be applied by decision-makers to choose the best investments for post-hazard event mitigations, emergency responses and recovery strategies with more realistic scenarios.
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