Abstract
In Indian cities like Delhi, where seismic demand is on a higher side, it will be prudent enough to perform seismic analysis of underground structures like tunnels, which in this study, is the primary focus. The geometry of Delhi Metro and specific soil conditions experienced in Delhi are considered for the analysis. The seismic analysis was carried out using pseudo-static approach, considering site conditions. In order to appreciate the effect of earthquake loads, analyses were carried out for both static loads and seismic loads, separately. The response of tunnel liner in terms of moments, thrusts and shear are predicted under both loads. However, the effect of seismic loads on these response parameters is quantified in terms of additional moments, thrusts and shear respectively. Also, emphasis is given to quantify surface displacements due to tunneling under earthquake loads, in addition to static loads. It is found that the response of twin tunnels is affected by earthquake loading, which may be incorporated in the design.
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Jishnu, R.B., Ayothiraman, R. (2018). Behaviour of Urban Metro Twin Tunnels Under Earthquake Loads. In: Agaiby, S., Grasso, P. (eds) Engineering Challenges for Sustainable Underground Use. GeoMEast 2017. Sustainable Civil Infrastructures. Springer, Cham. https://doi.org/10.1007/978-3-319-61636-0_10
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DOI: https://doi.org/10.1007/978-3-319-61636-0_10
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