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NONLINEAR RESPONSE OF DEEP IMMERSED TUNNEL TO STRONG SEISMIC SHAKING (2007)
Critical for the seismic safety of immersed tunnels is the magnitude of deformations developing in the segment joints, as a result of the combined longitudinal and lateral vibrations. Analysis and design against such vibrations is the main focus of this paper, with reference to a proposed 70 m-deep immersed tunnel in a highly seismic region, in Greece. The multisegment tunnel is modeled as a beam connected to the ground through properly calibrated interaction springs, dashpots, and sliders.
Although this research was prompted by the needs of a specific project, the dynamic analysis methods, the proposed design concepts, and many of the conclusions of the study are sufficiently general and may apply in other immersed tunneling projects.
Journal of Geotechnical and Geoenvironmental Engineering, ©ASCE, Vol. 133, No. 9, September 1, 2007, 1067–1090
National Technical University of Athens Greece