Seismic Performance Analysis of Underground Ramp Tunnel Structure Using 3-D Massive Numerical Computation
Abstract eng: There is increasing concern about the three-dimensional finite element analysis of large underground tunnels due to the threat of a nearby earthquake generating large strong motion on the tunnel with spatial variation. Using a new numerical analysis method based on massive numerical computation, we carried out a 3-D seismic response analysis of an underground ramp tunnel structure. Based on the finite element method, this method can analyze a large-scale computer model consisting of a nearby ground structure as well as the entire tunnel structure to be studied. As expected, the 3-D seismic response of the tunnel is complicated due to the complex configuration of the tunnel structure. While the intensity of response is smaller than the design criterion, the calculations show large deformation and stress for the part where the ramp tunnel passes through the interface between soft and hard ground layers, with stress and section force varied on the connection with the ramp tunnel. These results suggest that 3-D seismic response analyses should be performed for underground tunnels with complicated configuration which could be subjected to a nearby earthquake.
Contributors:
Publisher:
National Technical University of Athens, 2011
Conference Title:
Conference Title:
COMPDYN 2011 - 3rd International Thematic Conference
Conference Venue:
Island of Corfu (GR)
Conference Dates:
2011-05-25 / 2011-05-28
Rights:
Text je chráněný podle autorského zákona č. 121/2000 Sb.
Record appears in:
Record created 2016-11-14, last modified 2016-11-14
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