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Response of Underground Tunnel Against Seismic Loading
From past earthquakes, it is evident that underground structures found more vulnerable to seismic activities which lead to the collapse of whole structure. Therefore, the study is focused to investigate the behavior of underground tunnel against seismic loading, considering static and dynamic scenarios using two-dimensional finite element software ABAQUS CAE. In static analysis, effects of gravity load and geostatic load on the soil domain was considered whereas time history data of earthquake was used to study the seismic response in case of dynamic analysis. The tunnel liner behavior is modeled using elastic model whereas elastic–plastic behavior of soil is incorporated using Mohr Coulomb Plasticity model readily available in ABAQUS library. The predicted numerical results were presented in terms of displacements and compared with Uttarkashi earthquake data and found that the results were in close proximity using both static (4.83 mm) as well as dynamic (96.36 mm) analysis. Further, the response of tunnels under two different earthquake data such as El Centro and Kobe ground motion time history in soil domain were studied in order to estimate the response of tunnels under severe conditions. It was observed that the maximum displacement for Uttarkashi, Kobe and El-Centro earthquake was found to be 96.36, 185.36 and 281.56 mm, respectively. It was also observed that the variation of displacement along y- direction in El- Centro and Kobe earthquake is found to be 36% however; the magnitude of displacement is very less as compare to x-direction.
Response of Underground Tunnel Against Seismic Loading
From past earthquakes, it is evident that underground structures found more vulnerable to seismic activities which lead to the collapse of whole structure. Therefore, the study is focused to investigate the behavior of underground tunnel against seismic loading, considering static and dynamic scenarios using two-dimensional finite element software ABAQUS CAE. In static analysis, effects of gravity load and geostatic load on the soil domain was considered whereas time history data of earthquake was used to study the seismic response in case of dynamic analysis. The tunnel liner behavior is modeled using elastic model whereas elastic–plastic behavior of soil is incorporated using Mohr Coulomb Plasticity model readily available in ABAQUS library. The predicted numerical results were presented in terms of displacements and compared with Uttarkashi earthquake data and found that the results were in close proximity using both static (4.83 mm) as well as dynamic (96.36 mm) analysis. Further, the response of tunnels under two different earthquake data such as El Centro and Kobe ground motion time history in soil domain were studied in order to estimate the response of tunnels under severe conditions. It was observed that the maximum displacement for Uttarkashi, Kobe and El-Centro earthquake was found to be 96.36, 185.36 and 281.56 mm, respectively. It was also observed that the variation of displacement along y- direction in El- Centro and Kobe earthquake is found to be 36% however; the magnitude of displacement is very less as compare to x-direction.
Response of Underground Tunnel Against Seismic Loading
Lecture Notes in Civil Engineering
Marano, Giuseppe Carlo (editor) / Rahul, A. V. (editor) / Antony, Jiji (editor) / Unni Kartha, G. (editor) / Kavitha, P. E. (editor) / Preethi, M. (editor) / Singh, Mulayam (author) / Senthil, Kasilingam (author) / Bawa, Shailja (author)
International Conference on Structural Engineering and Construction Management ; 2022 ; Angamaly, India
2022-10-30
13 pages
Article/Chapter (Book)
Electronic Resource
English
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