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Wave Propagation in a Periodic Jointed Tunnel Model
In this study, the tunnel is assumed to be composed of tunnel segments, segment joints, and elastic foundations. For simplicity, it can be approximated as a pipe-beam model with periodic joints under elastic foundations. The tunnel segment is treated as a pipe-beam model based on Timoshenko beam theory, while the segment joints are simplified as linearly elastic springs which sustain axial forces and shear forces as well as bending moments. By using the differential equations governing the longitudinal and flexural vibration of the pipe-beam under elastic foundations and the force equilibrium of the joints, the transfer matrix between two consecutive cells is obtained. Numerical examples are presented, and the effects of various parameters are examined through analysis of propagation constants. The deformed shapes of the system with finite periodic cells are calculated using ANSYS to validate the theoretical predictions.
Wave Propagation in a Periodic Jointed Tunnel Model
In this study, the tunnel is assumed to be composed of tunnel segments, segment joints, and elastic foundations. For simplicity, it can be approximated as a pipe-beam model with periodic joints under elastic foundations. The tunnel segment is treated as a pipe-beam model based on Timoshenko beam theory, while the segment joints are simplified as linearly elastic springs which sustain axial forces and shear forces as well as bending moments. By using the differential equations governing the longitudinal and flexural vibration of the pipe-beam under elastic foundations and the force equilibrium of the joints, the transfer matrix between two consecutive cells is obtained. Numerical examples are presented, and the effects of various parameters are examined through analysis of propagation constants. The deformed shapes of the system with finite periodic cells are calculated using ANSYS to validate the theoretical predictions.
Wave Propagation in a Periodic Jointed Tunnel Model
Ding, Lan (author) / Yin, Tao (author) / Zhu, HongPing (author)
Geo-Hubei 2014 International Conference on Sustainable Civil Infrastructure ; 2014 ; Yichang, Hubei, China
2014-06-23
Conference paper
Electronic Resource
English
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