TIME HISTORY ANALYSIS OF UNDERGROUND TUNNEL
Nishant Kumar
Department of Civil Engineering, Sharda University , IN
Prashant Kumar
Department of Civil Engineering, Sharda University , IN
Sunil Saharan
Department of Civil Engineering, Sharda University , IN
Keywords: Time History Analysis, Seismic responses, Underground rectangular tunnel, SAP 2000, NonLinear Analysis.
Abstract
In the present paper study of non-linear dynamic analysis of underground rectangular tunnel considering different seismic intensities is carried out and seismic responses of such structure are studied. The tunnel under consideration is modelled with the help of SAP2000 software. The two different time histories (i)El-Centro earthquake (ii)Nepal earthquake have been used. The results of the study show similar variations pattern in Seismic responses such as displacement, velocity and acceleration with intensities (Mw = 6.9) and (Mw=7.8). From the study it is recommended that analysis of underground rectangular tunnel using Time History method becomes necessary to ensure safety against earthquake force. The analysis is performed to compute the displacement and internal force in tunnels that took place in each phase of construction and loading. The earthquake loads are applied to the tunnels during operation.
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