Open AccessDOI
Seismic Analysis of Shallow Tunnels in Soil Medium
Abdullah Ansari,K. S. Rao,A. K. Jain +2 more
- pp 343-352
TLDR
In this paper, Wang and Penzien used two analytical solutions for the analysis of tunnel lining forces, constructed in soft to hard soil with various mechanical properties and constant shear strain, and found that the induced circular stress in the tunnel liner is decreased with increasing soil stiffness.Abstract:
In both urban and national frameworks, tunnels form vital components of the transport and utility systems. They are being constructed in densely populated urban zones and metro cities at an expanding rate to promote rising space and passage requirements. Occurrence of any sort of seismic activity in that particular region may cause damage of these infrastructures. Hence, a careful consideration of the impacts of seismic loadings on the analysis and design of tunnels is required as a part of hazard 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 was 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 is 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.read more
Citations
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Journal ArticleDOI
Seismic hazard assessment studies based on deterministic and probabilistic approaches for the Jammu region, NW Himalayas
Journal ArticleDOI
Liquefaction hazard assessment in a seismically active region of Himalayas using geotechnical and geophysical investigations: a case study of the Jammu Region
TL;DR: In this article , an attempt has been made to develop the zonation map for liquefaction hazard in the Jammu Region (JR) based on LPI and probability of LPA.
Journal ArticleDOI
Seismic Vulnerability of Tunnels in Jammu and Kashmir for Post Seismic Functionality
Book ChapterDOI
Damage Analysis of Seismic Response of Shallow Tunnels in Jammu
TL;DR: In this paper , the impact of seismic loadings on the analysis and design of tunnels is considered as a part of damage evaluation, and it is 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 designing of tunnels lining.
References
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Journal ArticleDOI
Seismic design and analysis of underground structures
TL;DR: A summary of the current state of seismic analysis and design for underground structures can be found in this paper, where the authors discuss special design issues, including the design of tunnel segment joints and joints between tunnels and portal structures.
Journal ArticleDOI
Aseismic design of underground structures
C.M. St John,T. F. Zahrah +1 more
TL;DR: In this paper, the authors define the basis for the aseismic design of subsurface excavations and underground structures, including a definition of the seismic environment and earthquake hazard, and a review of analytical and empirical tools that are available to the designer concerned with the performance of underground structures subjected to seismic loads.
Journal ArticleDOI
Seismically induced racking of tunnel linings
TL;DR: In this paper, an analytical procedure for evaluating the racking deformation of rectangular and circular tunnel linings caused by soil-structure interaction during a seismic event is presented, as applied to rectangular linings.
Journal ArticleDOI
Stresses in linings of bored tunnels
Joseph Penzien,Ching L. Wu +1 more
TL;DR: In this article, an analytical procedure is presented for evaluating the stresses in linings of bored tunnels caused by kinematic soil-lining interaction, which is applied separately to a steel lining and a concrete lining for a site located at the lower end of Market Street in San Francisco through which a BART (Bay Area Rapid Transit) tunnel passes.