Budapest University of Technology and EconomicsFaculty of Civil Engineering - Since 1782

Highway Bridges is one among identified critical infrastructure in Hungary and EU in general (IMPROVER, 2018).Nowadays, natural disasters is one of the critical problem that the world is facing which cause the most failure of critical infrastructures. The possible solution to alleviate the failure was established by IMPROVER project, where each member states of European Commission conducted a guideline for national risk assessment. The most addressed hazard was the loss of critical infrastructure (IMPROVER, 2018). The most cause of this loss were identified as natural disasters including earthquakes, flood, and accidents. Therefore, the seismic resilience assessment of highway bridges involves evaluating their ability to withstand and recover from earthquake-induced forces while maintaining functionality. Resilience goes beyond just seismic design; because it considers not only the bridge's capacity to resist damage during an earthquake but also how quickly it can be restored to service after the earthquake event. According to the previous studies (Vigh et al, 2021), different steps involved in seismic resilience analysis was established and carried out in the following stages: Seismic risk identification, Seismic hazard assessment, Fragility assessment, Traffic estimates, Direct and indirect cost calculation, Risk assessment, Resilience evaluation, and Resilience treatment technologies. Further studies will be focused on the resilience treatment technologies required to complete resilience analysis for the recovery as recommended in the previous research findings.
The aim of this study is seismic resilience analysis and design of bridge based on the possible retrofitting technologies. As methodology of this study, Literature review will be done on i) Resilience assessment of Critical infrastructures ii) Reinforced concrete bridges , ii) Precast prestressed concrete bridges, iii) Steel composite bridges iv)Bridges types and components, iv) Design method and vii) Construction methods. Besides, Advanced Analysis Tools such as Finite Element Models (FEM) software will be used to simulate the behavior of bridge structures during seismic events, including the effects of soil-structure interaction and Probabilistic Seismic Demand Models (PSDM) software as well to estimate the expected demand on a structure during an earthquake based on various ground motion parameters. Thus, the Seismic resilience analysis and design for highway bridges will be following the previous study findings and the expected outcomes of this study are the following: i) Structural Vulnerability Analysis, ii) Damage Assessment, iii) Functionality Assessment, iv) Retrofit, Design Strategies and challenges, v) Quantifying Resilience, and vi) Impact on Network Resilience, vii) Comparison of existing bridge model with retrofitted bridge model before and after seismic event( model validation against experimental test results).By the end of this study, conclusions and recommendations will be drawn by indicating that the durability and operational reliability of bridges is fully ensured by minimizing disruptions to critical transportation networks during and after seismic events. As well, the end results after application of seismic retrofitting techniques in model simulation, will show that the public safety is increased and that there is a reduction of repair cost after earthquakes and, ensuring the resilience of critical infrastructures.