Journal
INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS
Volume 46, Issue 8, Pages 1466-1493Publisher
WILEY
DOI: 10.1002/nag.3353
Keywords
boundary elements; dynamic soil-structure interaction; finite elements; lined shafts
Funding
- Brazilian National Council of Scientific and Technological Research [CNPq-134593/2015]
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This article proposes a novel numerical model for the dynamic response of large diameter, concrete-lined circular shafts embedded in transversely isotropic soils. The model accurately represents the energy exchange between the shaft and soil, as well as the energy propagation through the soil.
This article proposes a novel numerical model of the dynamic response of large diameter, concrete-lined circular shafts, embedded in transversely isotropic soils. Excitation is given as time-harmonic external loads applied to the base of the shaft, or vertically propagating, time-harmonic pressure waves. The concrete lining is modeled with finite annular plate and cylindrical-shell finite elements, while the contact tractions at the shaft-soil interface are modeled within a boundary elements framework. The response of the coupled system is obtained by imposing rigorous continuity and equilibrium conditions at the interface. The model yields accurate representation of the energy exchange between shaft and soil, as well as energy propagation through the soil as an unbounded medium. Original numerical results are presented on the response of the shaft and lining for selected geometric and constitutive parameters, frequencies and type of excitation, and anisotropic soil constitutions.
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