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http://dx.doi.org/10.7843/kgs.2020.36.11.119

Seismic Performance Evaluation of the Underground Utility Tunnel by Response Displacement Method and Response History Analysis  

Kwon, Ki-Yong (Dept. of Civil and Environmental Eng., Wonkwang Univ.)
Lee, Jin-Sun (Dept. of Civil and Environmental Eng., Wonkwang Univ.)
Kim, Yong-Kyu (ESCO Consultant and Engineers Company)
Youn, Jun-Ung (Disaster Status Control Office, Korea Infrastructure Safety & Technology Corporation)
Jeong, Soon-Yong (Nada Construction Research Institute)
Publication Information
Journal of the Korean Geotechnical Society / v.36, no.11, 2020 , pp. 119-133 More about this Journal
Abstract
Underground utility tunnel, the most representative cut and cover structure, is subjected to seismic force by displacement of the surrounding soil. In 2020, Korea Infrastructure Safety Corporation has published "Seismic Performance Evaluation Guideline for Existing Utility Tunnel." This paper introduces two seismic evaluation methods, RDM (Response Displacement Method) and RHA (Response History Analysis) adopted in the guide and compares the methods for an example of an existing utility tunnel. The test tunnel had been constructed in 1988 and seismic design was not considered. RDM is performed by single and double cosine methods based on the velocity response spectrum at the base rock. RHA is performed by finite difference analysis that is able to consider nonlinear behavior of soil and structure together in two-dimensional plane strain condition. The utility tunnel shows elastic behavior for RDM, but shows plastic hinge for RHA under the collapse prevention level earthquake.
Keywords
Response displacement method; Response history analysis; Seismic performance evaluation; Underground structure; Underground utility tunnel;
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