Seismic fragility analysis of highway bridges considering multi-dimensional performance limit state

Wang, Qiang; Wu, Zhang; Liu, Shukui

doi:10.1007/s11803-012-0109-1

Cited by 36 publications

(15 citation statements)

References 7 publications

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“…Inelastic rotation has been found to gradually reduce the stiffness and rigidity of the pier when they are subjected to seismic loads. It is thought that a reliable indicator of the damage is the ductility that results from inelastic rotation in the plastic hinge generated at the fixity points of piers [24]. The column ductility requirement is, by definition, stated as follows: 𝜑 = 𝜃 𝜃 𝑦 (13) where θy represents the equivalent rotation at the yield point and θ represents the rotation of pier in its plastic hinge.…”

Section: Damage Metrics and Threshold Limitsmentioning

confidence: 99%

Probabilistic Damage Analysis of Isolated Steel Tub Girder Bridge Excited by Near and Far Fault Ground Motions

Baig

Ansari

Islam

et al. 2023

IJE

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Friction Pendulum Bearing (FPB) has emerged as a popular solution for damage protection of bridges under seismic events. The study presents the probabilistic damage analysis for the isolated tub girder continuous bridge under the near and the far fault earthquakes using fragility analysis. The steel tub girder continuous bridge is considered with friction pendulum isolator as the seismic isolation mechanism. In order to represent the hysteretic behavior of friction pendulum isolators, a bilinear forcedeformation model was used. Fragility curves are developed for various damage measures namely rotational ductility of pier and girder displacement with the peak ground acceleration (PGA) as an intensity measure (IM). Incremental dynamic analyses (IDA) were performed to develop the fragility curves and probabilistic damage model considering the four threshold damage states. The results suggest that in the case of low PGA level, the near fault earthquake leads to the high probability of exceedance in the case of isolated tub girder bridge. Damage model for piers and girder were developed to correlate component responses levels to overall bridge deterioration states. Finally, recommendations for the bridge developers in the stage of the early bridge seismic isolation design utilizing friction pendulum isolators are discussed.

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Section: Damage Metrics and Threshold Limitsmentioning

confidence: 99%

Probabilistic Damage Analysis of Isolated Steel Tub Girder Bridge Excited by Near and Far Fault Ground Motions

Baig

Ansari

Islam

et al. 2023

IJE

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“…The fragility analysis is widely used for the seismic vulnerability assessment of structures Here, N e is the number of the selected seismic records on each site; N g is the number of the seismic records scaled from 0.05 g to 1.0 g with an increment of 0.05 g; N case is the total number of the HSR pier models; and T com is the required calculation time for seismic analysis of the HSR pier model (sec). [18]. The fragility curves represent the damage probability of structures at a given earthquake intensity, which is described by the lognormal cumulative distribution function [38,39].…”

Section: Efficiency Comparison According To the Flowcharts Shown Inmentioning

confidence: 99%

“…It can reflect the probability of the structures exceeding a critical value under a specific seismic intensity [15]. The different methodologies, such as the nonlinear time history analysis and the Pushover analysis, are widely adopted for the seismic fragility analysis of the highway bridge [16][17][18][19][20][21]. The nonlinear time history analysis is more reliable and accurate, while the Pushover analysis has the distinct advantages of the conceptual simplicity and the computational effectiveness [22,23].…”

Section: Introductionmentioning

confidence: 99%

Seismic Performance Evaluation of Typical Piers of China’s High‐Speed Railway Bridge Line Using Pushover Analysis

Guo

Liu

et al. 2019

Mathematical Problems in Engineering

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Currently, it is a challenge to effectively assess the seismic performance of the high-speed railway bridge line. To figure it out, this paper discussed the applicability of the Pushover analysis in the seismic fragility of the high-speed railway bridge. As the piers are the core components to resist the earthquakes, a typical high-speed railway bridge line consisting of 22 piers was established by the finite element software OpenSees. The influences of the different pier height and sites on the fragility analysis of the pies were investigated. From the component level, the seismic performance of the high-speed railway bridge line was evaluated by the Pushover analysis. The results show that the seismic responses of the piers by the Pushover analysis are agreeable with those by the incremental dynamical analysis when the peak ground acceleration is less than 0.4g. The high piers have better seismic performance than the lower piers. The high-speed railway bridge line exhibits good seismic performance under the 7-degree design earthquake (0.15g) and the 8-degree low-level earthquake (0.10g) but may be severely damaged under the 9-degree low-level earthquake (0.40g).

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“…Considering that bridge structures can present structural damage after seismic loading, some authors propose methodologies to estimate safety levels in bridges expressed in terms of fragility curves: Choi and Jeon (2003) evaluates the fragility of bridges and retrofit measures to increase the seismic resistance of the bridge structures; Kim and Feng (2003) estimates fragility curves considering different intensity measures; fragility curves are calculated in different kinds of bridges and zones in the United States (Choi et al 2004;Pan et al 2007); analytical fragility analysis is proposed for different components of the bridge structure (Padgett and DesRoches 2008). Wang et al (2012) estimates fragility curves considering multidimensional performance limit state parameters in concrete bridges; a multivariate fragility analysis is made considering the uncertainties in the seismic loadings (Wang et al 2018); the effect of the cumulative damage by seismic loadings is taken into account in the fragility analysis (Cui et al 2019;Panchireddi and Ghosh 2019;Tolentino et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Probabilistic demand assessment of bridges considering the effect of corrosion and seismic loading over time

Tolentino

Herrera

2021

Preprint

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This paper proposes an approach to calculate demand hazard curves considering the effect of both corrosion and seismic loadings over time. The corrosion is defined as the reduction of the cross-sectional area in the reinforced bars of concrete, induced by chloride ions. Three corrosion phases are considered: starting time of corrosion, cracking, and evolution time. Seismic loads are characterized as a stochastic Poisson process. Uncertainties related to the randomness of geometric properties, mechanical properties, and seismic loadings are considered. The approach is illustrated in a continuous bridge designed to comply with a drift of 0.002. The structure is located in Acapulco, Guerrero, Mexico. Fragility curves and demand hazard curves are obtained at 0, 45, 57, 75, 100, and 125 years, based on the global drift. The effect of both corrosion and seismic loadings over time increase the annual rate of demand up to 308% between 0 years (without damage) and 125 years after the bridge construction.

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Seismic fragility analysis of highway bridges considering multi-dimensional performance limit state

Cited by 36 publications

References 7 publications

Probabilistic Damage Analysis of Isolated Steel Tub Girder Bridge Excited by Near and Far Fault Ground Motions

Probabilistic Damage Analysis of Isolated Steel Tub Girder Bridge Excited by Near and Far Fault Ground Motions

Seismic Performance Evaluation of Typical Piers of China’s High‐Speed Railway Bridge Line Using Pushover Analysis

Probabilistic demand assessment of bridges considering the effect of corrosion and seismic loading over time

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