Hierarchical Bayesian framework for uncertainty reduction in the seismic fragility analysis of concrete gravity dams

2021 ◽  
Vol 246 ◽  
pp. 113001
Author(s):  
Giacomo Sevieri ◽  
Anna De Falco ◽  
Marco Andreini ◽  
Herman G. Matthies
Keyword(s):  
Bayesian Framework ◽  
Uncertainty Reduction ◽  
Fragility Analysis ◽  
Seismic Fragility ◽  
Hierarchical Bayesian ◽  
Gravity Dams ◽  
Concrete Gravity Dams

scholarly journals Metamodel-Based Seismic Fragility Analysis of Concrete Gravity Dams

2020 ◽  
Vol 146 (7) ◽  
pp. 04020121 ◽  
Author(s):  
Rocio Segura ◽  
Jamie E. Padgett ◽  
Patrick Paultre
Keyword(s):  
Fragility Analysis ◽  
Seismic Fragility ◽  
Gravity Dams ◽  
Concrete Gravity Dams

scholarly journals Determination of limit-states for near-fault seismic fragility assessment of concrete gravity dams

2018 ◽  
Vol 0 (0) ◽  
pp. 0-0 ◽  
Author(s):  
Mohammad Ali Sotoudeh ◽  
Mohsen Ghaemian ◽  
Abdolreza Sarvghad Moghadam
Keyword(s):  
Seismic Fragility ◽  
Gravity Dams ◽  
Limit States ◽  
Near Fault ◽  
Concrete Gravity Dams

Fragility Analysis of Concrete Gravity Dams

2001 ◽  
Vol 7 (2) ◽  
pp. 41-48 ◽  
Author(s):  
Bruce Ellingwood ◽  
Paulos B. Tekie
Keyword(s):  
Fragility Analysis ◽  
Gravity Dams ◽  
Concrete Gravity Dams

scholarly journals Shedding Light on the Effect of Uncertainties in the Seismic Fragility Analysis of Existing Concrete Dams

2020 ◽  
Vol 5 (3) ◽  
pp. 22 ◽  
Author(s):  
Giacomo Sevieri ◽  
Anna De Falco ◽  
Giovanni Marmo
Keyword(s):  
Risk Assessment ◽  
Earthquake Engineering ◽  
Seismic Risk ◽  
Numerical Models ◽  
Fragility Analysis ◽  
Seismic Fragility ◽  
Concrete Dams ◽  
Gravity Dams ◽  
Definition Of ◽  
Performance Based Earthquake Engineering

The seismic risk assessment of existing concrete gravity dams is of primary importance for our society because of the fundamental role of these infrastructures in the sustainability of a country. The seismic risk assessment of dams is a challenging task due to the lack of case histories, such as gravity dams’ seismic collapses, which hinders the definition of limit states, thus making the application of any conventional safety assessment approach difficult. Numerical models are then fundamental to predict the seismic behaviour of the complex dam-soil-reservoir interacting system, even though uncertainties strongly affect the results. These uncertainties, mainly related to mechanical parameters and variability of the seismic motion, are among the reasons that, so far, prevented the performance-based earthquake engineering approach from being applied to concrete dams. This paper discusses the main issues behind the application of the performance-based earthquake engineering to existing concrete dams, with particular emphasis on the fragility analysis. After a critical review of the most relevant studies on this topic, the analysis of an Italian concrete gravity dam is presented to show the effect of epistemic uncertainties on the calculation of seismic fragility curves. Finally, practical conclusions are derived to guide professionals to the reduction of epistemic uncertainties, and to the definition of reliable numerical models.

Fuzzy seismic fragility analysis of gravity dams considering spatial variability of material parameters

2021 ◽  
Vol 140 ◽  
pp. 106439
Author(s):  
Zefa Li ◽  
Zhenyu Wu ◽  
Jiankang Chen ◽  
Liang Pei ◽  
Xiang Lu
Keyword(s):  
Spatial Variability ◽  
Fragility Analysis ◽  
Seismic Fragility ◽  
Gravity Dams ◽  
Material Parameters

Seismic Fragility of Concrete Gravity Dams with Spatial Variation of Angle of Friction: Case Study

2016 ◽  
Vol 142 (5) ◽  
pp. 05015002 ◽  
Author(s):  
Carl Bernier ◽  
Jamie E. Padgett ◽  
Jean Proulx ◽  
Patrick Paultre
Keyword(s):  
Spatial Variation ◽  
Seismic Fragility ◽  
Gravity Dams ◽  
Angle Of Friction ◽  
Concrete Gravity Dams

Seismic fragility assessment of concrete gravity dams

2003 ◽  
Vol 32 (14) ◽  
pp. 2221-2240 ◽  
Author(s):  
Paulos B. Tekie ◽  
Bruce R. Ellingwood
Keyword(s):  
Seismic Fragility ◽  
Gravity Dams ◽  
Concrete Gravity Dams

Comparison of steel frames with RWS and WFP beam-to-column connections through seismic fragility analysis

2020 ◽  
pp. 136943322097728
Author(s):  
Haoran Yu ◽  
Weibin Li
Keyword(s):  
Limit State ◽  
Pushover Analysis ◽  
Steel Frames ◽  
Fragility Analysis ◽  
Structural Safety ◽  
Seismic Fragility ◽  
Fe Modelling ◽  
Collapse Resistance ◽  
Seismic Collapse ◽  
Probabilistic Seismic Demand

Reduced web section (RWS) connections and welded flange plate (WFP) connections can both effectively improve the seismic performance of a structure by moving plastic hinges to a predetermined location away from the column face. In this paper, two kinds of steel frames—with RWS connections and WFP connections—as well as different frames with welded unreinforced flange connections were studied through seismic fragility analysis. The numerical simulation was conducted by using multiscale FE modelling. Based on the incremental dynamic analysis and pushover analysis methods, probabilistic seismic demand analysis and seismic capability analysis were carried out, respectively. Finally, combined with the above analysis results, probabilistic seismic fragility analysis was conducted on the frame models. The results showed that the RWS connection and WFP connection (without double plates) have little influence on reducing the maximum inter-storey drift ratio under earthquake action. RWS connections slightly reduce the seismic capability in non-collapse stages and improve the seismic collapse resistance of a structure, which exhibits good structural ductility. WFP connections can comprehensively improve the seismic capability of a structure, but the seismic collapse resistance is worse than that of RWS connections when the structure has a large number of storeys. The frame with WFP connections has a lower failure probability at every seismic limit state, while the frame with RWS connections sacrifices some of its structural safety in non-collapse stages to reduce the collapse probability.

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