Multi-arch dam safety evaluation based on statistical analysis and numerical simulation
Abstract The Foziling multi-arch dam, one of the few multi-arch dams in the world, was built on the bedrock with complicated geological conditions. It has undergone several reinforcements since it was put into service in the 1950s. In this study, the dam safety is evaluated by analyzing the measured...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2022-05-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-022-13073-9 |
| _version_ | 1811254195075940352 |
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| author | Qi He Chongshi Gu Silvio Valente Erfeng Zhao Xing Liu Dongyang Yuan |
| author_facet | Qi He Chongshi Gu Silvio Valente Erfeng Zhao Xing Liu Dongyang Yuan |
| author_sort | Qi He |
| collection | DOAJ |
| description | Abstract The Foziling multi-arch dam, one of the few multi-arch dams in the world, was built on the bedrock with complicated geological conditions. It has undergone several reinforcements since it was put into service in the 1950s. In this study, the dam safety is evaluated by analyzing the measured displacements and simulating stresses in the concrete. Firstly, the multiple linear stepwise regression (MLSR) is used to train and test the relationships between the loads and displacement based on the hydrostatic-temperature-time (HTT) model. Subsequently, the contributions of water level, temperature, and time to displacements are determined, and the influence characteristics of water level and temperature on displacements are interpreted. Finally, the dam stress state is evaluated by establishing a dam finite element model and simulating the stress distribution in various operating conditions. The results indicate that (1) the dam is currently in an elastic state after the last reinforcement; (2) temperature contributes the most to the displacement, and the drastic fluctuation of temperature is the disadvantage factor for multi-arch dam safety; (3) the stresses generally can meet the requirements of code; and (4) the ideas and methods of the study can provide references for the safety evaluation of other concrete dams. |
| first_indexed | 2024-04-12T17:03:46Z |
| format | Article |
| id | doaj.art-acc6db819dd24e51a61aa1702c045fe1 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-04-12T17:03:46Z |
| publishDate | 2022-05-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-acc6db819dd24e51a61aa1702c045fe12022-12-22T03:24:00ZengNature PortfolioScientific Reports2045-23222022-05-0112111910.1038/s41598-022-13073-9Multi-arch dam safety evaluation based on statistical analysis and numerical simulationQi He0Chongshi Gu1Silvio Valente2Erfeng Zhao3Xing Liu4Dongyang Yuan5State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai UniversityState Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai UniversityDepartment of Structural, Geotechnical and Building Engineering, Politecnico di TorinoState Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai UniversityChina Three Gorges Construction Engineering CorporationState Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai UniversityAbstract The Foziling multi-arch dam, one of the few multi-arch dams in the world, was built on the bedrock with complicated geological conditions. It has undergone several reinforcements since it was put into service in the 1950s. In this study, the dam safety is evaluated by analyzing the measured displacements and simulating stresses in the concrete. Firstly, the multiple linear stepwise regression (MLSR) is used to train and test the relationships between the loads and displacement based on the hydrostatic-temperature-time (HTT) model. Subsequently, the contributions of water level, temperature, and time to displacements are determined, and the influence characteristics of water level and temperature on displacements are interpreted. Finally, the dam stress state is evaluated by establishing a dam finite element model and simulating the stress distribution in various operating conditions. The results indicate that (1) the dam is currently in an elastic state after the last reinforcement; (2) temperature contributes the most to the displacement, and the drastic fluctuation of temperature is the disadvantage factor for multi-arch dam safety; (3) the stresses generally can meet the requirements of code; and (4) the ideas and methods of the study can provide references for the safety evaluation of other concrete dams.https://doi.org/10.1038/s41598-022-13073-9 |
| spellingShingle | Qi He Chongshi Gu Silvio Valente Erfeng Zhao Xing Liu Dongyang Yuan Multi-arch dam safety evaluation based on statistical analysis and numerical simulation Scientific Reports |
| title | Multi-arch dam safety evaluation based on statistical analysis and numerical simulation |
| title_full | Multi-arch dam safety evaluation based on statistical analysis and numerical simulation |
| title_fullStr | Multi-arch dam safety evaluation based on statistical analysis and numerical simulation |
| title_full_unstemmed | Multi-arch dam safety evaluation based on statistical analysis and numerical simulation |
| title_short | Multi-arch dam safety evaluation based on statistical analysis and numerical simulation |
| title_sort | multi arch dam safety evaluation based on statistical analysis and numerical simulation |
| url | https://doi.org/10.1038/s41598-022-13073-9 |
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