Seismic Fragility Estimates and Optimization of Retrofitting Strategies for Reinforced Concrete Bridges: Case Study of the Fabela Bridge in Toluca, Mexico

Bisadi, Vahid; Head, Monique; Gardoni, Paolo

doi:10.1061/41171(401)2

Cited by 4 publications

(3 citation statements)

References 8 publications

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“…Recently, analytical methodologies have been extended to retrofitted bridges, with a view to assessing the seismic behaviour of bridge systems retrofitted with various retrofit techniques and strategies, and evaluate their effectiveness. Fragility curves were derived for bridges retrofitted with reinforced concrete (RC) or FRP jackets (Bisadi et al, 2011, Mohammadi & Lahijanian, 2010, as well as for bridges with seismic isolation (high-damping bearings with lead core, friction bearings) (Zhang & Huo, 2009); moreover, fragility-informed selection of optimum retrofit schemes for specific performance criteria has been recenlty proposed, involving use of fragility curves for as-built and retrofitted bridges (Stefanidou & Kappos, 2021).…”

Section: Introductionmentioning

confidence: 99%

An online platform for bridge-specific fragility analysis of as-built and retrofitted bridges

Paraskevopoulos

Papanikolaou

Kappos

2022

Bull Earthquake Eng

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Bridges are the most critical and usually the most vulnerable structural component of a road network exposed to various hazards. Damage due to recent earthquakes worldwide highlighted the substantial direct and indirect financial losses related to partial or total collapse of critical bridge components and pointed to the need for reliable assessment of their seismic performance. This paper presents a 'toolkit' developed for bridge-specific fragility analysis of bridges; it is implemented on a "two-track" online platform, including ad-hoc developed software for online bridge-specific fragility curve derivation, as well as the option to select an appropriate set of generic fragility curves from a database including a broad range of bridge classes. Three alternative options for the estimation of component-specific limit state thresholds are provided; selection from extensive lists with available thresholds for piers, bearings and abutments, and calculation of limit state thresholds for as-built and retrofitted piers based on (a) closed-form relationships, or (b) inelastic pushover analysis and capacity assessment of a parametrically defined pier model (carried out online). Details regarding the software developed, the methodology for bridge-specific fragility curves, and all critical features are presented and discussed herein. The application of the online software is illustrated through two case studies involving the derivation of fragility curves for bridges with different structural systems and properties.

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Section: Introductionmentioning

confidence: 99%

An online platform for bridge-specific fragility analysis of as-built and retrofitted bridges

Paraskevopoulos

Papanikolaou

Kappos

2022

Bull Earthquake Eng

View full text Add to dashboard Cite

show abstract

“…Pushover analyses (a total of 20) of the components are performed for their longitudinal and the transverse direction (Figure 8), as well as pushover analyses (20) of the bridge system for the two directions.…”

Section: Implementation Of the Methodology (Steps 1 And 2 -System Capmentioning

confidence: 99%

“…Fragility curves of retrofitted bridges quantify the efficiency of retrofit measures, when compared to the as-built ones. Limited studies concerning various retrofit measures applied to a single bridge component [19,20] or a number of components [10] reveal the retrofit impact and the performance of the retrofitted structures under various seismic intensities. Another important issue apart from the efficiency of the retrofit measures is the efficiency of retrofit strategies [1] that can emerge from the combination of different retrofit measures applied to the system components.…”

Section: Introductionmentioning

confidence: 99%