FINITE ELEMENT ANALYSIS OF UNDERGROUND TWIN TUNNEL SUBJECTED TO SEISMIC FORCES

Authors

  • Shilpa Vijayakumar PG Scholar, Dept. of Civil Engineering, SVNCE
  • Raji M Asst. Professor, Dept. of Civil Engineering,GECBH
  • Tincy Anna Yohannan Asst. Professor, Dept. of Civil Engineering, SVNCE

Keywords:

Underground twin tunnel, Elasto-plastic analysis, Kobe earthquake, FEA software ANSYS,Seismic forces

Abstract

Nowadays most of the infrastructure facilities are concentrated towards the underground space due to high rate of
global urbanization and increased population. By choosing the underground as a construction space the problems such as
greater traffic congestion, higher levels of air pollution, lack of green space and insufficient water supplies etc., can be
solved to a great extent.Underground facilities built in areas subject to earthquake activity must withstand both seismic and
static loading. Historically, these structures have experienced a lower rate of damage rather than surface structures. But
some underground structures have experienced significant damage in recent large earthquakes. The present study deals with
3-D nonlinear finite element analysis of underground twin tunnel subjected to seismic forces by varying parametric
sensitivities such as radius of opening of twin tunnels, with and without concrete lining provision and also with varying
concrete lining thickness in order to identify the best structural configuration which can adopt in highly earthquake prone
areas. Here time-history analysis has been carried out using Kobe earthquake data, in which load is applied in the form of
acceleration for analysis. Seismic analysis is carried out by using FEA software package ANSYS v.12, based on elastic and
elasto-plastic analysis. The stresses and displacements obtained from analysis on each case have been investigated and
compared, which shows the deformation level of the twin tunnels, thereby can identify the better structural configuration with
the provision of appropriate spacing.

Published

2016-07-25

How to Cite

Shilpa Vijayakumar, Raji M, & Tincy Anna Yohannan. (2016). FINITE ELEMENT ANALYSIS OF UNDERGROUND TWIN TUNNEL SUBJECTED TO SEISMIC FORCES. International Journal of Advance Engineering and Research Development (IJAERD), 3(7), 166–175. Retrieved from https://ijaerd.com/index.php/IJAERD/article/view/1556