Measurement of the distribution and magnitude of static and dynamic earth pressures resulting from geostatic and applied stresses is essential to the design and performance of many civil engineering-type structures involving soil-structure interaction. Seismic soil pressures recorded on a vertical flexible hollow shaft with model scale dimensions of 0.8 m square and 7.0 m in height are compared with predictions from elastic-based analytical approaches found in current literature. The vertical shafts were part of an underground structure system, placed in a laminar soil box, and embedded in a two-layer soil stratigraphy. Two directional ground motions were applied via shake table testing at the E-Defense facility in Japan. Pressure measurements were recorded using recently developed pressure sensors and details pertaining to the design, fabrication, and calibration of the sensor are discussed. Despite of the uncommon geometry of the vertical shaft systems, elastic based methods were able to predict the response reasonably well, in some cases capturing both, pressure magnitudes and pressure distribution.
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