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Damage Analysis of Seismic Response of Shallow Tunnels in Jammu
There are lots of tunnel construction project is under progress in Jammu region of Indian Himalaya, at an expanding rate as a part of urban development and infrastructure design. Tunnel construction is playing vital role in urban and national transportation framework. Occurrence of any sort of seismic activity in Jammu and nearby areas may cause damage of these infrastructure. Hence, a careful consideration of the impacts of seismic loadings on the analysis and design of tunnels is needed as a part of damage evaluation. Different closed form analytical approaches exist, such as methods given by Wang and Penzien for seismic analysis of shallow tunnels. Ovaling deformations occur when seismic waves propagate perpendicular to the axis of tunnel and are therefore, designed for the transverse direction. In this paper, these two analytical solutions are used for the analysis of tunnel lining forces, constructed in soft to hard soil with various mechanical properties and constant shear strain. Seismic analysis carried out by means of selecting eight unique types of soil, very soft clay to highly dense sand. The study indicates a relative error in both analytical methods. It was found that the variations in thrust and bending moment are dependent on the flexibility ratio, thus, it is proposed that the stress distribution to be considered for analysis and design of tunnels lining. It is also seen that the induced circular stress in the tunnel liner is decreased with increasing soil stiffness.
Damage Analysis of Seismic Response of Shallow Tunnels in Jammu
There are lots of tunnel construction project is under progress in Jammu region of Indian Himalaya, at an expanding rate as a part of urban development and infrastructure design. Tunnel construction is playing vital role in urban and national transportation framework. Occurrence of any sort of seismic activity in Jammu and nearby areas may cause damage of these infrastructure. Hence, a careful consideration of the impacts of seismic loadings on the analysis and design of tunnels is needed as a part of damage evaluation. Different closed form analytical approaches exist, such as methods given by Wang and Penzien for seismic analysis of shallow tunnels. Ovaling deformations occur when seismic waves propagate perpendicular to the axis of tunnel and are therefore, designed for the transverse direction. In this paper, these two analytical solutions are used for the analysis of tunnel lining forces, constructed in soft to hard soil with various mechanical properties and constant shear strain. Seismic analysis carried out by means of selecting eight unique types of soil, very soft clay to highly dense sand. The study indicates a relative error in both analytical methods. It was found that the variations in thrust and bending moment are dependent on the flexibility ratio, thus, it is proposed that the stress distribution to be considered for analysis and design of tunnels lining. It is also seen that the induced circular stress in the tunnel liner is decreased with increasing soil stiffness.
Damage Analysis of Seismic Response of Shallow Tunnels in Jammu
Lecture Notes in Civil Engineering
Das, B. B. (editor) / Hettiarachchi, Hiroshan (editor) / Sahu, Prasanta Kumar (editor) / Nanda, Satyajeet (editor) / Ansari, Abdullah (author) / Rao, K. Seshagiri (author) / Jain, A. K. (author)
Recent Developments in Sustainable Infrastructure (ICRDSI-2020)—GEO-TRA-ENV-WRM ; Chapter: 47 ; 611-619
2022-04-07
9 pages
Article/Chapter (Book)
Electronic Resource
English
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