Deterioration mechanism and stochastic damage modeling of tunnel lining concrete in hydrothermal corrosive environments
Abstract Corrosion caused by geothermal water and thermal damage due to high temperature are the critical causes of lining material cracking and structural instability in hydrotherm al high-geothermal tunnels. In order to investigate the coupled effect of high temperature and corrosion on the macros...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2025-07-01
|
| Series: | Scientific Reports |
| Subjects: | |
| Online Access: | https://doi.org/10.1038/s41598-025-05228-1 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849333017183518720 |
|---|---|
| author | Yu Ning Zhiwei Yan Yanhua Zeng Chunwei Zhang Yucang Dong |
| author_facet | Yu Ning Zhiwei Yan Yanhua Zeng Chunwei Zhang Yucang Dong |
| author_sort | Yu Ning |
| collection | DOAJ |
| description | Abstract Corrosion caused by geothermal water and thermal damage due to high temperature are the critical causes of lining material cracking and structural instability in hydrotherm al high-geothermal tunnels. In order to investigate the coupled effect of high temperature and corrosion on the macroscopic mechanical properties and microstructure of lining concrete, a series of experiments have been conducted, and a new thermal-corrosion damage model has been proposed that can describe the evolution of the mechanical properties of concrete in this particular environment. The study results indicate that the mass loss rate exhibits a trend of decreasing and then increasing as the degree of corrosion increases. It has been demonstrated that elevated temperatures can significantly accelerate the corrosion of concrete by sulfate ions, with a mass loss rate exceeding 15% observed at 60 °C–120 d. The corrosion of concrete at elevated temperatures also results in internal expansion and damage, accompanied by a notable increase in the number and size of cracks. The compressive strength and elasticity modulus of specimens decline with an increase in temperature and an extension of corrosion time. The maximum reduction in intensity is 68%. The simulation results based on the discrete-random damage model proposed in this paper are able to characterise the anisotropic properties of concrete under high-temperature and corrosive conditions. In comparison to the conventional discrete element model parameter calibration method, the crack spreading and damage patterns of specimens exhibit notable discrepancies. The degree of fragmentation at the damage area intensified considerably with the alteration of temperature and corrosion duration, accompanied by a reduction in the number of medium-sized fragments. There is a downward trend in the number of cracks under the destruction ultimate state. The research findings offer theoretical guidance for the resistance degradation of concrete structures in service under hydrothermally corrosive environments and structural analysis. |
| format | Article |
| id | doaj-art-3a29c1b97b4b41bbac5fb2c777bdebcd |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-3a29c1b97b4b41bbac5fb2c777bdebcd2025-08-20T03:46:01ZengNature PortfolioScientific Reports2045-23222025-07-0115112310.1038/s41598-025-05228-1Deterioration mechanism and stochastic damage modeling of tunnel lining concrete in hydrothermal corrosive environmentsYu Ning0Zhiwei Yan1Yanhua Zeng2Chunwei Zhang3Yucang Dong4Southwest Jiaotong UniversityCollege of Water Resource and Hydropower, Sichuan UniversitySouthwest Jiaotong UniversitySouthwest Jiaotong UniversitySchool of Urban and Geology Engineering, Hebei GEO UniversityAbstract Corrosion caused by geothermal water and thermal damage due to high temperature are the critical causes of lining material cracking and structural instability in hydrotherm al high-geothermal tunnels. In order to investigate the coupled effect of high temperature and corrosion on the macroscopic mechanical properties and microstructure of lining concrete, a series of experiments have been conducted, and a new thermal-corrosion damage model has been proposed that can describe the evolution of the mechanical properties of concrete in this particular environment. The study results indicate that the mass loss rate exhibits a trend of decreasing and then increasing as the degree of corrosion increases. It has been demonstrated that elevated temperatures can significantly accelerate the corrosion of concrete by sulfate ions, with a mass loss rate exceeding 15% observed at 60 °C–120 d. The corrosion of concrete at elevated temperatures also results in internal expansion and damage, accompanied by a notable increase in the number and size of cracks. The compressive strength and elasticity modulus of specimens decline with an increase in temperature and an extension of corrosion time. The maximum reduction in intensity is 68%. The simulation results based on the discrete-random damage model proposed in this paper are able to characterise the anisotropic properties of concrete under high-temperature and corrosive conditions. In comparison to the conventional discrete element model parameter calibration method, the crack spreading and damage patterns of specimens exhibit notable discrepancies. The degree of fragmentation at the damage area intensified considerably with the alteration of temperature and corrosion duration, accompanied by a reduction in the number of medium-sized fragments. There is a downward trend in the number of cracks under the destruction ultimate state. The research findings offer theoretical guidance for the resistance degradation of concrete structures in service under hydrothermally corrosive environments and structural analysis.https://doi.org/10.1038/s41598-025-05228-1Lining concreteHigh temperatureHydrothermally corrosive environmentDamage model |
| spellingShingle | Yu Ning Zhiwei Yan Yanhua Zeng Chunwei Zhang Yucang Dong Deterioration mechanism and stochastic damage modeling of tunnel lining concrete in hydrothermal corrosive environments Scientific Reports Lining concrete High temperature Hydrothermally corrosive environment Damage model |
| title | Deterioration mechanism and stochastic damage modeling of tunnel lining concrete in hydrothermal corrosive environments |
| title_full | Deterioration mechanism and stochastic damage modeling of tunnel lining concrete in hydrothermal corrosive environments |
| title_fullStr | Deterioration mechanism and stochastic damage modeling of tunnel lining concrete in hydrothermal corrosive environments |
| title_full_unstemmed | Deterioration mechanism and stochastic damage modeling of tunnel lining concrete in hydrothermal corrosive environments |
| title_short | Deterioration mechanism and stochastic damage modeling of tunnel lining concrete in hydrothermal corrosive environments |
| title_sort | deterioration mechanism and stochastic damage modeling of tunnel lining concrete in hydrothermal corrosive environments |
| topic | Lining concrete High temperature Hydrothermally corrosive environment Damage model |
| url | https://doi.org/10.1038/s41598-025-05228-1 |
| work_keys_str_mv | AT yuning deteriorationmechanismandstochasticdamagemodelingoftunnelliningconcreteinhydrothermalcorrosiveenvironments AT zhiweiyan deteriorationmechanismandstochasticdamagemodelingoftunnelliningconcreteinhydrothermalcorrosiveenvironments AT yanhuazeng deteriorationmechanismandstochasticdamagemodelingoftunnelliningconcreteinhydrothermalcorrosiveenvironments AT chunweizhang deteriorationmechanismandstochasticdamagemodelingoftunnelliningconcreteinhydrothermalcorrosiveenvironments AT yucangdong deteriorationmechanismandstochasticdamagemodelingoftunnelliningconcreteinhydrothermalcorrosiveenvironments |