A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Seismic Ground Surface Amplification Pattern due to the Presence of Twin Tunnels
In this study, a series of 1-g large shaking table tests were conducted on a soil layer with embedded twin tunnels to evaluate the acceleration distribution pattern at the ground surface. Furthermore, numerical analyses were executed to simulate the shaking table tests. The agreement between the results of experimental records and the predicted numerical results confirmed the validation of the numerical simulations. Additionally, further numerical analysis indicated that several parameters, including dimensionless period of input motion (λ/D), distance between two tunnels (s/a), embedment depth of twin tunnels (h/a), and soil shear-wave velocity (Vs), altered the peak ground acceleration pattern at the ground surface. As an important indication for λ/D = 2 and 4, the surface accelerations were attenuated between two tunnels, in contrast to λ/D = 6 and 8. Also, numerical analyses demonstrated that for small distances between two tunnels (s/a = 2.6 and 3), the twin tunnels (together) affected the amplification pattern. However, with increasing the distance between two tunnels (s/a = 4, 5, and 6), each tunnel acted separately, similar to a single tunnel.
Seismic Ground Surface Amplification Pattern due to the Presence of Twin Tunnels
In this study, a series of 1-g large shaking table tests were conducted on a soil layer with embedded twin tunnels to evaluate the acceleration distribution pattern at the ground surface. Furthermore, numerical analyses were executed to simulate the shaking table tests. The agreement between the results of experimental records and the predicted numerical results confirmed the validation of the numerical simulations. Additionally, further numerical analysis indicated that several parameters, including dimensionless period of input motion (λ/D), distance between two tunnels (s/a), embedment depth of twin tunnels (h/a), and soil shear-wave velocity (Vs), altered the peak ground acceleration pattern at the ground surface. As an important indication for λ/D = 2 and 4, the surface accelerations were attenuated between two tunnels, in contrast to λ/D = 6 and 8. Also, numerical analyses demonstrated that for small distances between two tunnels (s/a = 2.6 and 3), the twin tunnels (together) affected the amplification pattern. However, with increasing the distance between two tunnels (s/a = 4, 5, and 6), each tunnel acted separately, similar to a single tunnel.
Seismic Ground Surface Amplification Pattern due to the Presence of Twin Tunnels
Int. J. Geomech.
Baziar, Mohammad Hassan (author) / Rokh, Sanan Hour (author) / Ahmadpanah, Nasim (author) / Rashedi, Mir Mahdi (author)
2025-03-01
Article (Journal)
Electronic Resource
English
Seismic Response of Twin Circular Tunnels
| British Library Conference Proceedings | 2003
Seismic response of twin circular tunnels
| British Library Conference Proceedings | 2003
Nonlinear Amplification of Seismic Ground Motion by Twin Cavities
| British Library Conference Proceedings | 2013
Seismic Response of Twin Tunnels in Weathered Rocks
| ASCE | 2012