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2306. A Multicriteria Approach for the Definition of Priorities of Intervention for Roadway Bridges and Viaducts
Invited abstract in session TB-47: Portfolio Risk Management, stream Multiple Criteria Decision Analysis.
Tuesday, 10:30-12:00Room: 50 (building: 324)
Authors (first author is the speaker)
| 1. | Chiara D'Alpaos
|
| Department of Civil Environmental and Architectural Engineering, University of Padova | |
| 2. | Flora Faleschini
|
| ICEA, University of Padova | |
| 3. | Silvia Manarin
|
| University of Padova | |
| 4. | Carlo Pellegrino
|
| University of Padova | |
| 5. | Mariano Angelo Zanini
|
| University of Padova |
Abstract
In recent years, the assessment of structural performances and functionality of roadway bridges and viaducts has become a key issue in Italy and in most European Countries. Large part of the existing stock exhibits deficiencies due to the aging of the structures and the ever-growing demanding traffic conditions and safety requirements, compared to the original design phase. In 2020, in Italy were issued to assess bridges and viaducts risk exposure and proposed a multilevel approach based on census, visual inspection, and a preliminary and qualitative risk indicator. To define this risk indicator, four types of risks are considered: structural and foundation risk, seismic risk, landslide risk, and hydraulic risk. After this preliminary evaluation, in-depth tests and more accurate analyses should be implemented on any bridge or viaduct exposed to high risk. During the first application of these guidelines, several difficulties were detected in finalizing a ranking of the infrastructures included in the same class of risk. This paper proposes an AHP absolute model to rank roadway bridges and viaducts by priority on intervention, based on structural and foundation risks. In detail, to identify criteria, sub-criteria, and rating, and define the hierarchy, an extensive literature review was conducted and a pool of experts was interviewed via a Delphi survey process. Focus groups were organized to validate the hierarchy by dynamic discussion and identify local and global priorities.
Keywords
- Analytic Hierarchy Process
- Decision Support Systems
- Strategic Planning and Management
Status: accepted
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