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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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Published in: | Computers and geotechnics 2014-01, Vol.55, p.187-194 |
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description | 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. |
doi_str_mv | 10.1016/j.compgeo.2013.08.012 |
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subjects | Concretes Dynamic tests Earthquakes Liners Mathematical analysis Mathematical models P-waves Stratigraphy Topography Tunnels Tunnels (transportation) Unreinforced concrete |
title | Analysis of circular tunnels due to seismic P-wave propagation, with emphasis on unreinforced concrete liners |
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