Methodology

To meet the project objectives, a comprehensive methodology that includes theoretical, numerical and on-site work is required. The work is organized into five Work Packages (WPs) which cover fully the expertise of the PI and provide an open-collaboration project with the ambition to last several years beyond the three-year duration of RESISTANT. 

The five parts of the methodology are shown in the flowchart:

Impact & Novelty

Key Novelty: RESISTANT fills a knowledge gap by integrating three key areas:

1. Multiple Hazard Fragility Assessment for bridges.
2. Explicit modeling of deteriorated structural capacity over time.
3. SHM-based updating of fragility curves—a framework not yet widely applied in engineering practice.

Socio-Economic Impact:

• Improved Safety and Resilience: Enhances the resilience of critical infrastructure against major events.
• Proactive Decision-Making: Provides bridge operators with a reliable tool for risk management, enabling them to prioritize maintenance actions and efficiently allocate resources.
• Reduced Life-Cycle Cost: Ensures minimum maintenance costs through efficient and timely operations, thus reducing the overall life-cycle cost of the structure.

Work Packages (WPs)

WP	Title	Goal & Methodology
WP1	Fragility assessment under multiple hazards	Review and calibrate state-of-the-art fragility assessment methods to quantify the three major hazards (Seismic, Flood, Scour) and their combined effects.
WP2	Structural assessment of deteriorated RC bridges	Develop member and structure analysis models that incorporate material deterioration (e.g., loss of strength, stiffness) by translating inspection data (provided by Egnatia Odos SA) into material model parameters.
WP3	Updated fragility estimates using Structural Health Monitoring	Instrument a case study bridge on the Egnatia motorway. Use OMA (Operational Modal Analysis) and other SHM methods to obtain response data. Solve an inverse problem to update the bridge’s structural parameters and, ultimately, its fragility curves.
WP4	Development of a holistic tool for fragility assessment	Develop the final modular software platform (programmed in Python with a web interface, in collaboration with REDI PC) that integrates all data, models, and results for efficient bridge inventory management.