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(사)한국터널지하공간학회

3-Dimentional numerical study on dynamic behavior of connection between vertical shaft and tunnel under earthquake loading

(사)한국터널지하공간학회 / (사)한국터널지하공간학회, (P)2233-8292; (E)2287-4747
2018, v.20 no.5, pp.887-897
https://doi.org/10.9711/KTAJ.2018.20.5.887





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Abstract

3D time history analysis was performed on vertical shaft-tunnel connection to provide insight into the dynamic stress-strain behavior of the connection considering the effects of soil layers, periodic characteristics and wave direction of earthquakes. MIDAS GTS NX based on FEM (Finite Element Method) was used for this study. From this study, it is revealed that the maximum displacement occurred at the upper part of the connection when the long period seismic waves propagate through the tunnel direction in soft ground. Also, stress concentration occurs due to different behaviors of vertical shaft and tunnel, and the stress concentration could be influence for safety on the connection. The results of this study could be useful for the seismic performance design of vertical shaft-tunnel connection.

keywords
수직구-터널 접속부, 3차원 유한요소해석, 시간이력해석, 동적 거동, Vertical shaft-tunnel connection, 3D Finite element analysis, Time history analysis, Dynamic behavior

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(사)한국터널지하공간학회