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Seismic fragility assessment of concrete gravity dams under near source synthetic ground motions

Gorai, Soumya / Maity, Damodar

This study aims at seismic fragility assessment of concrete gravity dams under synthetic near source ground motions. The numerical modelling of the dam-reservoir-foundation coupled system and the nonlinear time history analysis are carried out in ABAQUS. Two sets of synthetic near source records characterized by forward-directivity and fling-step effects are generated using an empirical stochastic approach. Maximum value of the seismic response quantities of the coupled system are obtained as engineering demand parameters (EDP) and various ground motions parameters are selected as intensity measurement (IM). Fragility functions are generated from the cloud response data (EDP-IM pairs) using a Probabilistic Seismic Demand Model (PSDM).

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Seismic fragility assessment of concrete gravity dams under near source synthetic ground motions

Gorai, Soumya / Maity, Damodar

This study aims at seismic fragility assessment of concrete gravity dams under synthetic near source ground motions. The numerical modelling of the dam-reservoir-foundation coupled system and the nonlinear time history analysis are carried out in ABAQUS. Two sets of synthetic near source records characterized by forward-directivity and fling-step effects are generated using an empirical stochastic approach. Maximum value of the seismic response quantities of the coupled system are obtained as engineering demand parameters (EDP) and various ground motions parameters are selected as intensity measurement (IM). Fragility functions are generated from the cloud response data (EDP-IM pairs) using a Probabilistic Seismic Demand Model (PSDM).

Seismic fragility assessment of concrete gravity dams under near source synthetic ground motions

Gorai, Soumya / Maity, Damodar

This study aims at seismic fragility assessment of concrete gravity dams under synthetic near source ground motions. The numerical modelling of the dam-reservoir-foundation coupled system and the nonlinear time history analysis are carried out in ABAQUS. Two sets of synthetic near source records characterized by forward-directivity and fling-step effects are generated using an empirical stochastic approach. Maximum value of the seismic response quantities of the coupled system are obtained as engineering demand parameters (EDP) and various ground motions parameters are selected as intensity measurement (IM). Fragility functions are generated from the cloud response data (EDP-IM pairs) using a Probabilistic Seismic Demand Model (PSDM).

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Title:

Seismic fragility assessment of concrete gravity dams under near source synthetic ground motions

Contributors:

Gorai, Soumya (author) / Maity, Damodar (author)

Published in:

Structure and Infrastructure Engineering ; 21 ; 281-301

Publication date:

2025-02-01

Size:

21 pages

ISSN:

1573-2479 , 1744-8980

DOI:

https://doi.org/10.1080/15732479.2023.2207168

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

Keywords:

Concrete gravity dam , dam-reservoir-foundation system , probabilistic seismic demand model , seismic fragility , stochastic model , synthetic near source earthquakes

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