Seismic load considerations in the design of underground structures for hydropower projects in the Himalayan region
Available Online November 2016.
- https://doi.org/10.2991/rare-16.2016.54How to use a DOI?
- Seismic Load; Underground Structures; Hydropower Projects; Himalayan Region
- Generally, during earthquake events, underground structures have experienced a lower rate of damage than surface structures. Nevertheless,some underground structures registered significant damages in large earthquakes (the 1995 Kobe, Japan, the 1999 Chi-Chi, Taiwan, the 1999 Turkey, the 2008 China). Due to seismic events and consequent propagation of elastic waves, the underground structures experience dynamic forces and moments that may affect its stability, depending on the size of the structure, strength of rock, depth of overburden , stiffness of rock support system etc. In this paper, numerical analysis using Phase2 software (2D FEM) has been used for investigating the effects of seismicity on tunnelsin weak and competent rock. Influence of rock mass quality (Q) on the axial force developed in the tunnel lining due to dynamic loading has also been examined. The study shows that the impact of seismic loading on tunnel supports are more significant in weak rocks than in competent rock mass. The results obtained from this study can serve as useful tools for design of support system for tunnels and caverns in areas susceptible to earthquake, especially in the Himalayan region, where many new hydropower projects are being planned
- Open Access
- This is an open access article distributed under the CC BY-NC license.
Cite this article
TY - CONF AU - T.K. Sivarajan PY - 2016/11 DA - 2016/11 TI - Seismic load considerations in the design of underground structures for hydropower projects in the Himalayan region BT - Recent Advances in Rock Engineering (RARE 2016) PB - Atlantis Press SN - 2352-5401 UR - https://doi.org/10.2991/rare-16.2016.54 DO - https://doi.org/10.2991/rare-16.2016.54 ID - Sivarajan2016/11 ER -