A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Seismic response of concrete gravity dams under near field and far field ground motions
Highlights Numerical study on concrete gravity dams to near field and far field ground motions. Finite element formulation of dam-reservoir-foundation system in MATLAB. Implementation of non-reflecting boundary condition at reservoir and foundation boundary. Performance evaluation of concrete gravity dams based on linear time history analysis.
Abstract Near field ground motions trigger higher damage to the structures due to the presence of distinct velocity pulses which are absent in far field ground motions. The present study deals with the time history analysis of dam-reservoir-foundation coupled system using finite element technique under near field and far field ground motions. Koyna dam, which is a concrete gravity dam, is taken as case study for the present investigation. Six ground motions, recorded near to the ruptured fault are selected as near field ground motions. Whereas, six other ground motions, recorded at other stations located far away from fault plane, of the same earthquake events, are considered as far field ground motions. Along with the comparative study of seismic response of Koyna dam, qualitative assessment of the seismic performance of the dam are also evaluated. The results obtained from the analysis demonstrate the different impact of near field and far field ground motions on the seismic response of concrete gravity dams. Further, the study also ascertain the importance of selection of far field ground motions on seismic safety of concrete gravity dams.
Seismic response of concrete gravity dams under near field and far field ground motions
Highlights Numerical study on concrete gravity dams to near field and far field ground motions. Finite element formulation of dam-reservoir-foundation system in MATLAB. Implementation of non-reflecting boundary condition at reservoir and foundation boundary. Performance evaluation of concrete gravity dams based on linear time history analysis.
Abstract Near field ground motions trigger higher damage to the structures due to the presence of distinct velocity pulses which are absent in far field ground motions. The present study deals with the time history analysis of dam-reservoir-foundation coupled system using finite element technique under near field and far field ground motions. Koyna dam, which is a concrete gravity dam, is taken as case study for the present investigation. Six ground motions, recorded near to the ruptured fault are selected as near field ground motions. Whereas, six other ground motions, recorded at other stations located far away from fault plane, of the same earthquake events, are considered as far field ground motions. Along with the comparative study of seismic response of Koyna dam, qualitative assessment of the seismic performance of the dam are also evaluated. The results obtained from the analysis demonstrate the different impact of near field and far field ground motions on the seismic response of concrete gravity dams. Further, the study also ascertain the importance of selection of far field ground motions on seismic safety of concrete gravity dams.
Seismic response of concrete gravity dams under near field and far field ground motions
Gorai, Soumya (author) / Maity, Damodar (author)
Engineering Structures ; 196
2019-06-09
Article (Journal)
Electronic Resource
English
Seismic Risk Analysis of Concrete Gravity Dams under Near-Fault Ground Motions
| Trans Tech Publications | 2012
Seismic Risk Analysis of Concrete Gravity Dams under Near-Fault Ground Motions
| Tema Archive | 2012
Seismic Risk Analysis of Concrete Gravity Dams under Near-Fault Ground Motions
| British Library Conference Proceedings | 2012
Seismic fragility assessment of concrete gravity dams under near source synthetic ground motions
| Taylor & Francis Verlag | 2025
| Taylor & Francis Verlag | 2018