Analysis of circular tunnels due to seismic P-wave propagation, with emphasis on unreinforced concrete liners

A set of closed-form expressions to calculate tunnel liner forces due to compressional seismic P-wave propagation is presented. The results are compared against a state-of-practice method that considers only shear S-waves, and verified against dynamic numerical analyses. Under the realistic assumpti...

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Bibliographic Details
Published in:Computers and geotechnics 2014-01, Vol.55, p.187-194
Main Authors: Kouretzis, George P., Andrianopoulos, Konstantinos I., Sloan, Scott W., Carter, John P.
Format: Article
Language:English
Subjects:
Concretes
Dynamic tests
Earthquakes
Liners
Mathematical analysis
Mathematical models
P-waves
Stratigraphy
Topography
Tunnels
Tunnels (transportation)
Unreinforced concrete
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Summary:A set of closed-form expressions to calculate tunnel liner forces due to compressional seismic P-wave propagation is presented. The results are compared against a state-of-practice method that considers only shear S-waves, and verified against dynamic numerical analyses. Under the realistic assumption of full-slip conditions at the liner-rock mass interface, it is shown that P-waves can lead to significantly higher axial hoop forces compared to S-waves, and can be critical for tunnels bored through areas of irregular topography/geological stratigraphy. The findings are of particular interest for the analysis of unreinforced concrete tunnel liners, where earthquake effects can be a governing factor.
ISSN:0266-352X
1873-7633
DOI:10.1016/j.compgeo.2013.08.012