Abstract
New Delhi is a city affected by near/far-field earthquakes, where underground metro construction activities have been undertaken since the early 2000s. Due to the seismic effects, these structures are designed by conventional force/displacement methods. The present study validates the efficacy of these methods, numerically. For this, varying geotechnical conditions in static and seismic cases were quantified with the expected ground motion. Bored tunnels at different cover depths were modeled in 2D and 3D, to ascertain the static response of these structures, followed by a true dynamic analysis. It was found that conventional design procedures using force methods gave conservative estimates for increments on the tunnel liner. Also, the importance of a full dynamic analysis could not be ignored because (i) higher surface spectral responses were found at the tunnel pillar location and (ii) the cumulative strains on the tunnel liner were found to exceed permissible limits.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
