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Effect of Flexibility Ratio on Seismic Response of Cut-and-Cover Box Tunnel

Title
Effect of Flexibility Ratio on Seismic Response of Cut-and-Cover Box Tunnel
Author
박두희
Keywords
SITE RESPONSE; UNDERGROUND TUNNEL; DYNAMIC-RESPONSE; SQUARE TUNNELS; CENTRIFUGE; MODEL; VULNERABILITY; VALIDATION; BEHAVIOR; DESIGN
Issue Date
2019-07
Publisher
HINDAWI LTD
Citation
ADVANCES IN CIVIL ENGINEERING, v. 2019, article no. 4905329
Abstract
Equivalent linear time history analyses are conducted to calculate the seismic response of various types of cut-and-cover single box tunnels. A finite-element numerical model is calibrated against the results of centrifuge tests. The calculated tunnel responses compare favourably with the measurements. A validated model is then used to quantify the seismic response of box tunnels. The flexibility ratio (F) is illustrated to have a governing influence on the tunnel response. It is shown that the previously developed relationship between F and the racking ratio (R) is applicable for a wide range of F up to 20. It is also shown that an increase in F accompanies corresponding increase in R, the spectral acceleration in the tunnel lining, and the shear stress along the tunnel lining-soil interface. The thrust in the tunnel lining is also revealed to increase with F, although the calculated value is significantly lower than the pressure on yielding walls. Additionally, the surface settlement is shown to increase with an increase in F.
URI
https://www.hindawi.com/journals/ace/2019/4905329/https://repository.hanyang.ac.kr/handle/20.500.11754/152075
ISSN
1687-8086; 1687-8094
DOI
10.1155/2019/4905329
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > CIVIL AND ENVIRONMENTAL ENGINEERING(건설환경공학과) > Articles
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