Seismic fragility evaluation of various mitigation strategies proposed for bridge piers

Salkhordeh, Mojtaba; Govahi, Ehsan; Mirtaheri, Masoud

doi:10.1016/j.istruc.2021.05.041

“…Recent seismic events have underscored the fragility of infrastructures in seismically active regions (Kawashima et al 2009;Pang et al 2020;Xiang et al 2021;Salkhordeh et al 2021). Many infrastructures were built before the adoption of contemporary European and International seismic guidelines (Wardhana and Hadipriono 2003;Afsar Dizaj et al 2023;Zucca et al 2023), leading to high seismic vulnerability (Wallace et al 2001;Yen 2002).…”

Section: Introductionmentioning

confidence: 99%

Multimodal seismic assessment of infrastructures retrofitted with exoskeletons: insights from the Foggia Airport case study

Cucuzza,

Aloisio,

Domaneschi

et al. 2024

Bull Earthquake Eng

0

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Addressing the seismic vulnerability of infrastructures is critical, especially for those built before the introduction of the current seismic regulations. One of the primary challenges lies in retrofitting these buildings without interrupting their functionality. In this context, the use of exoskeletons for seismic retrofitting represents an effective solution. This approach increases the seismic resistance and ensures the continuous operation of the building during retrofitting. This advantage is especially crucial for critical infrastructures, such as airports. Nevertheless, traditional seismic assessment methods based on pushover analyses might not accurately predict the seismic capacity of complex infrastructures dominated by local vibration modes. To bridge this gap, the study proposes refining the multimodal pushover analysis tailored for seismic vulnerability assessments of large infrastructures with exoskeletons characterized by low modal participation ratios. The Foggia Airport case study exemplifies these points and highlights the practical applications of the discussed advancements. The authors compared two force distributions for push-over analysis, addressing the fine-tuning of exoskeletons to maximize their seismic resistance.

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“…Y. Ding et al carried out numerical vulnerability investigations and found that RC bridge piers constructed with high-strength steel bars have lower low-cycle fatigue and ductility performance compared to that constructed with conventional steel bars, which is particularly problematic for RC bridge piers in highly seismic regions [12]. Seismic vulnerability analysis is of great significance to evaluate the safety of piers during actual earthquake actions [13][14][15]. Existing studies have analyzed the vulnerability during actual earthquake actions relatively less, and the quantitative analysis of the impact of various parameters is less, which is not conducive to the comprehensive evaluation of the seismic performance of piers.…”

Section: Introductionmentioning

confidence: 99%

Seismic fragility analysis of self-centering segmental piers with mortise-tenon shear keys

Hao¹,

Ni²,

Liu³

et al. 2023

J. vibroeng.

2

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To comprehensively consider and study the seismic performance of the self-center mortise-tenon segmental pier, its vulnerability under earthquake is evaluated. The reliability of the model is verified by comparing the cyclic pseudo-static test results with the finite element models. The model is used as the basis for vulnerability analysis. Taking the maximum displacement of the pier top as a damage index. Different damage states are described. The damage index limits μcy1, μcy, μc2, and μcmax of different damage levels are determined. The time history analysis of cast-in-place pier and mortise-tenon segmental piers under different earthquake actions is carried out by using finite element software. The probabilistic seismic demand model is established through IDA curves. And the seismic vulnerability analysis is carried out. The influence of various parameters on the seismic vulnerability of mortise-tenon segmental pier is studied by changing the longitudinal reinforcement ratio, axial compression ratio, and aspect ratio. The results show that the seismic vulnerability of the two types of piers designed according to the principle of equivalence is similar under different damage states. It can be considered that it has better seismic performance. The longitudinal reinforcement ratio, axial compression ratio, and aspect ratio have a great impact on the vulnerability of piers.

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“…Recent seismic events have underscored the fragility of infrastructures in seismically active regions [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Multimodal Seismic Assessment of Infrastructures Retrofitted with Exoskeletons: Insights from the Foggia Airport Case Study

Cucuzza,

Aloisio,

Domaneschi

et al. 2023

Preprint

0

View full text Add to dashboard Cite

Addressing the seismic vulnerability of infrastructures is critical, especially for those built before the introduction of the current seismic regulations. One of the primary challenges lies in retrofitting these buildings without interrupting their functionality. In this context, the use of exoskeletons for seismic retrofitting represents an effective solution. This approach increases the seismic resistance and ensures the continuous operation of the building during retrofitting. This advantage is especially crucial for critical infrastructures, such as airports. Nevertheless, traditional seismic assessment methods based on pushover analyses might not accurately predict the seismic capacity of complex infrastructures dominated by local vibration modes. To bridge this gap, the study proposes refining the multimodal pushover analysis tailored for seismic vulnerability assessments of large infrastructures with exoskeletons characterized by low modal participation ratios. The Foggia Airport case study exemplifies these points and highlights the practical applications of the discussed advancements. The authors compared two force distributions for push-over analysis, addressing the fine-tuning of exoskeletons to maximize their seismic resistance.

show abstract

Seismic fragility evaluation of various mitigation strategies proposed for bridge piers

Cited by 23 publications

References 50 publications

Multimodal seismic assessment of infrastructures retrofitted with exoskeletons: insights from the Foggia Airport case study

Multimodal seismic assessment of infrastructures retrofitted with exoskeletons: insights from the Foggia Airport case study

Seismic fragility analysis of self-centering segmental piers with mortise-tenon shear keys

Multimodal Seismic Assessment of Infrastructures Retrofitted with Exoskeletons: Insights from the Foggia Airport Case Study

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