Seismic Fragility Analysis of Cable-Stayed Bridges Considering Different Sources of Uncertainties

Pang, Yutao; Wu, Xun; Shen, Guoyu; Yuan, Wancheng

doi:10.1061/(asce)be.1943-5592.0000565

Cited by 154 publications

(55 citation statements)

References 27 publications

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“…This is considered a conservative approach, although it does not necessarily represent the ultimate failure of the bridge deck and tower sections. Although several parameters have been used to derive fragility for cable-stayed bridges (Iemura and Pradono, 2003;Domaneschi, 2005;Casciati et al, 2008;Pang et al, 2014), the parameters proposed in Barnawi and Dyke (2014) are adopted herein: deck's displacement, base shear forces and overturning moments at the piers. Regarding deck response, the maximum absolute deck displacement for each time history analysis is compared to the displacement threshold value equal to 0.1% of the bridge length.…”

Section: Earthquake Vulnerabilitymentioning

confidence: 99%

Climate Change and Natural Hazard Risk Assessment Framework for Coastal Cable-Stayed Bridges

Markogiannaki

2019

Front. Built Environ.

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Cable-stayed bridges have been used widely in the last 60 years in bridge construction practice and are key components of transportation networks. Therefore, the potential damages and losses, either in terms of economic cost or fatalities due to natural or man-made threats could become considerably large. Several researchers have identified the significance of risk assessment, especially to natural hazards and have proposed risk assessment frameworks for bridges. Recently, it has been identified that climate change affects the occurrence of extreme events and should be also incorporated in risk assessment. In the present research work, a risk assessment framework for cable-stayed bridges is proposed. The goal is to prioritize single and total risk to provide a useful tool in the decision-making process on the design and maintenance actions for cable-stayed bridges. Herein, the case study is an indicative design alternative of a cable-stayed bridge in a coastal area in the New York Region. which is expected to face sea-level rise due to climate change. Multi-hazard risk evaluation on the investigated bridge shows that it has low risk to the seismic hazard, while it has increased risk to hurricanes, which changes from low to high depending on the investigated sea-level rise projections and hurricane intensity levels. Hence, hurricane governs the resulting total risk of the case study bridge.

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Section: Earthquake Vulnerabilitymentioning

confidence: 99%

Climate Change and Natural Hazard Risk Assessment Framework for Coastal Cable-Stayed Bridges

Markogiannaki

2019

Front. Built Environ.

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“…e development of fragility curves is not only limited to building structures. Pang et al [9] and Rasheed et al [10] conducted their researches for bridges, while Wang et al [11] and Yazdani and Alembagheri [12] established the fragility curves for dams. e present paper specifically considers the building structure only for developing the analytical fragility curves.…”

Section: Introductionmentioning

confidence: 99%

Seismic Vulnerability Assessment of School Buildings in Seismic Zone 4 of Pakistan

Zain

Usman

Farooq

et al. 2019

Advances in Civil Engineering

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Thick population density and its escalation propensity in seismically active regions of Pakistan has raised sincere concerns about the performance of building stock whose suboptimal performance and complete collapses led to a colossal number of casualties during the past earthquakes. The current research is inspired by the Kashmir earthquake of 2005 which consumed more than 80,000 lives, out of which, approximately 19,000 were children due to wide spread collapse of school buildings. A new database for existing reinforced concrete (RC) school buildings in seismic zone 4 of Pakistan has been developed using the surveyed information and presented briefly. The paper presents the statistics of the data collected through field surveys and professional interviews. It was found that the infrastructural authorities in the considered region developed some specific designs for school buildings, with varying architectural and structural configurations, which were eventually replicated throughout the area. In the current study, almost 2500 schools were surveyed for identifying versatile architectural and structural configurations, and subsequently, 19 different types had been identified, which were eventually used as representative stock for the schools in seismic zone 4 of Pakistan, Muzaffarabad district. The results of the study yield the brief of the collected data from the field and a consolidated methodology for establishing the analytical fragility relationships for one of the 19 structural configurations of the school buildings. A sample building from the collected data has been selected by considering the maximum number of students, and afterwards, the vulnerability is assessed by employing incremental dynamic analysis (IDA) which constitutes the presented methodology. Finally, the fragility curves are developed and presented for the said building type. The derived analytical fragility curves for the considered building type indicate its structural vulnerability and as a whole represent its satisfactory behavior. The vulnerability assessment process and the fragility development are described in an easy manner so that the domestic practicing engineers can readily become able to extend the application towards other school buildings in the region. The developed relationships can be employed for rational decision making so that essential disaster preparedness can be carried out by identifying any need for structural strengthening and interventions.

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“…Li et al [14] evaluated the seismic performance of a seacrossing cable-stayed bridge using the fragility function methodology. Pang et al [15] studied the seismic fragility of cable-stayed bridges considering different sources of uncertainties based on the uniform design method. Choine et al [16] made a seismic reliability assessment of reinforced concrete integral bridges subject to corrosion, and Ghosh and Sood [17] studied the degradation models for seismic fragility assessment of aging highway bridges.…”

Section: Introductionmentioning

confidence: 99%

Fragility Analysis of a Self‐Anchored Suspension Bridge Based on Structural Health Monitoring Data

Cheng

Zhang

2019

Advances in Civil Engineering

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This paper presents an improved fragility analysis methodology to estimate structural vulnerability for probabilistic seismic risk assessment. Three main features distinguish this study from previous efforts. Firstly, the updated fragility curves generated are based on experimental measurements and possess higher accuracy than those produced using design information only. The updated fragility curves take into consideration both the geometry and material properties, as well as long-term health monitoring data, to reflect the current state of the structure appropriately. Secondly, to avoid arbitrariness when selecting ground motions, probabilistic seismic hazard analysis (PSHA) is adopted to provide suggestions for ground motion selection. By considering the uncertainty of the location and intensity of future earthquakes, the PSHA deaggregation result can help to determine the most probable earthquake scenarios for the specific site. Thus, the suggested ground motions are more realistic, and the seismic demand model is much closer to the actual results. Thirdly, this study focuses on the seismic performance evaluation of a typical self-anchored suspension bridge using the form of fragility curves, which has seldom been studied in the literature. The results show that bearing is the most vulnerable part of a self-anchored suspension bridge, while failure probabilities of concrete towers are relatively lower.

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Seismic Fragility Analysis of Cable-Stayed Bridges Considering Different Sources of Uncertainties

Cited by 154 publications

References 27 publications

Climate Change and Natural Hazard Risk Assessment Framework for Coastal Cable-Stayed Bridges

Climate Change and Natural Hazard Risk Assessment Framework for Coastal Cable-Stayed Bridges

Seismic Vulnerability Assessment of School Buildings in Seismic Zone 4 of Pakistan

Fragility Analysis of a Self‐Anchored Suspension Bridge Based on Structural Health Monitoring Data

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