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Seepage dissolution effect prediction on aging deformation of concrete dams by coupled chemo-mechanical model
https://orcid.org/0000-0002-9595-1022
Highlights On-site inspection to reflect the micro-structure of a concrete gravity dam after 24 years operation. An aging model to characterize the seepage dissolution damage of corroded concrete. A novel model by introducing an overall damage scalar to reflect the chemo-mechanical coupled effect. Irreversible aging deformation caused by the seepage dissolution of an arch dam is predicted.
Abstract Concrete dams undergo a seepage dissolution process because of huge reservoir water pressure and concrete permeability, and such dissolution weakens the mechanical properties of concrete and produces a certain amount of irreversible aging deformation. This study proposes a coupled chemo-mechanical model to predict the seepage dissolution effect on aging deformation of concrete dams. The interactions between elastic–plastic, chemical damage and mechanical damage are jointly explored combining with on-site inspection of long-term service performance of a concrete gravity dam firstly. Then an aging model of the seepage dissolution damage is digitized, and a novel model on chemo-mechanical coupled effect is put forward by introducing an overall chemo-mechanical damage scalar. The validity of the model is proved by a case study on the gravity dam through finite element simulation on its seepage dissolution and comparison with monitoring data. Finally, these methods are applied into an ultra-high arch dam to quantitatively calculate the irreversible aging deformation with the increase of the seepage dissolution degree. And the annual maximum aging deformation of the arch dam increases 0.65 mm after 100 years. The results indicate that the proposed model can effectively predict the aging deformation caused by the seepage dissolution during long-term operation of concrete dams.
Seepage dissolution effect prediction on aging deformation of concrete dams by coupled chemo-mechanical model
https://orcid.org/0000-0002-9595-1022
Highlights On-site inspection to reflect the micro-structure of a concrete gravity dam after 24 years operation. An aging model to characterize the seepage dissolution damage of corroded concrete. A novel model by introducing an overall damage scalar to reflect the chemo-mechanical coupled effect. Irreversible aging deformation caused by the seepage dissolution of an arch dam is predicted.
Abstract Concrete dams undergo a seepage dissolution process because of huge reservoir water pressure and concrete permeability, and such dissolution weakens the mechanical properties of concrete and produces a certain amount of irreversible aging deformation. This study proposes a coupled chemo-mechanical model to predict the seepage dissolution effect on aging deformation of concrete dams. The interactions between elastic–plastic, chemical damage and mechanical damage are jointly explored combining with on-site inspection of long-term service performance of a concrete gravity dam firstly. Then an aging model of the seepage dissolution damage is digitized, and a novel model on chemo-mechanical coupled effect is put forward by introducing an overall chemo-mechanical damage scalar. The validity of the model is proved by a case study on the gravity dam through finite element simulation on its seepage dissolution and comparison with monitoring data. Finally, these methods are applied into an ultra-high arch dam to quantitatively calculate the irreversible aging deformation with the increase of the seepage dissolution degree. And the annual maximum aging deformation of the arch dam increases 0.65 mm after 100 years. The results indicate that the proposed model can effectively predict the aging deformation caused by the seepage dissolution during long-term operation of concrete dams.
Seepage dissolution effect prediction on aging deformation of concrete dams by coupled chemo-mechanical model
https://orcid.org/0000-0002-9595-1022
Highlights On-site inspection to reflect the micro-structure of a concrete gravity dam after 24 years operation. An aging model to characterize the seepage dissolution damage of corroded concrete. A novel model by introducing an overall damage scalar to reflect the chemo-mechanical coupled effect. Irreversible aging deformation caused by the seepage dissolution of an arch dam is predicted.
Abstract Concrete dams undergo a seepage dissolution process because of huge reservoir water pressure and concrete permeability, and such dissolution weakens the mechanical properties of concrete and produces a certain amount of irreversible aging deformation. This study proposes a coupled chemo-mechanical model to predict the seepage dissolution effect on aging deformation of concrete dams. The interactions between elastic–plastic, chemical damage and mechanical damage are jointly explored combining with on-site inspection of long-term service performance of a concrete gravity dam firstly. Then an aging model of the seepage dissolution damage is digitized, and a novel model on chemo-mechanical coupled effect is put forward by introducing an overall chemo-mechanical damage scalar. The validity of the model is proved by a case study on the gravity dam through finite element simulation on its seepage dissolution and comparison with monitoring data. Finally, these methods are applied into an ultra-high arch dam to quantitatively calculate the irreversible aging deformation with the increase of the seepage dissolution degree. And the annual maximum aging deformation of the arch dam increases 0.65 mm after 100 years. The results indicate that the proposed model can effectively predict the aging deformation caused by the seepage dissolution during long-term operation of concrete dams.
Seepage dissolution effect prediction on aging deformation of concrete dams by coupled chemo-mechanical model
Zhao, Erfeng (author) / Wu, Chengqing (author) / Wang, Shaowei (author) / Hu, Jiang (author) / Wang, Weiqiang (author)
2019-11-11
Article (Journal)
Electronic Resource
English
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