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Collapse mechanism of cut-and-cover tunnels under seismic loading

Title
Collapse mechanism of cut-and-cover tunnels under seismic loading
Author
박두희
Keywords
collapse mechanism; damage state; cut-and-cover tunnel; seismic loading; inelastic frame analysis
Issue Date
2015-11
Publisher
ARC
Citation
15th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2015: New Innovations and Sustainability 2015, Pages 934-937
Abstract
We investigate the collapse mechanism of rectangular cut-and-cover tunnels under seismic loading from inelastic frame analyses. The propagation of plastic hinges in the reinforced concrete lining is observed. It is shown that the plastic hinge start to form at the bottom corners of the structure. The shear strain at which the plastic hinge start to develop and tunnel collapses are investigated. Whereas the plastic hinge develops at a shear strain of 1.2 % for soils with a shear velocity of 50 m/s, it is formed at a low shear strain of 0.04 % for a soil with a shear velocity of 400 m/s. The shear strain-moment diagram proposed in this study provide a simple yet robust method to evaluate the seismic performance of cut-and-cover box tunnels under seismic loading.
URI
https://www.jstage.jst.go.jp/article/jgssp/2/25/2_KOR-35/_articlehttp://hdl.handle.net/20.500.11754/28934
ISSN
2188-8027
DOI
10.3208/jgssp.KOR-35
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > CIVIL AND ENVIRONMENTAL ENGINEERING(건설환경공학과) > Articles
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