Seismic Response Analyses of a Large-Span Powerhouse Cavern Considering Rock–Structure Interaction

Underground structures in earthquake-prone zones should be designed to withstand both static overburden pressures and earthquake shocks. This paper presents a case study on a large-span powerhouse cavern. With seismic data selected from past earthquake records, lab and in situ tests of the cavern’s...

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Bibliographic Details
Published in:Applied sciences 2022-07, Vol.12 (13), p.6649
Main Authors: Lv, Yumei, Wang, Lichuan, Chen, Yu, Gong, Lun, Li, Shibo
Format: Article
Language:English
Subjects:
2D and 3D dynamic analyses
Case studies
Caverns
Construction
Continuum modeling
Dynamic response
Dynamic stability
Earthquakes
Electricity
FEM equivalent continuum modeling
Field tests
Geomechanics
Ground motion
Hoek–Brown model
In situ tests
Laboratories
Nuclear power plants
Overburden
powerhouse cavern
rock mass
Rock masses
Rocks
rock–structure interaction
Seismic activity
Seismic design
Seismic response
Seismic stability
Stability analysis
Two dimensional analysis
Underground caverns
Underground construction
Underground structures
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Summary:Underground structures in earthquake-prone zones should be designed to withstand both static overburden pressures and earthquake shocks. This paper presents a case study on a large-span powerhouse cavern. With seismic data selected from past earthquake records, lab and in situ tests of the cavern’s geological and geomechanical conditions were performed to analyze the static and dynamic stability of the cavern through the continuum modeling approach. Performance analyses via both 2D and 3D modeling were carried out under seismic conditions and for selected design ground motions. The dynamic response of the surrounding rock mass and of the reinforcement system was detected. The results obtained will facilitate future stability analyses of large underground caverns constructed in the past on the basis of seismic design analyses and input data from post-earthquake records that were recently made available on the site.
ISSN:2076-3417
2076-3417
DOI:10.3390/app12136649