Enabling Full-Scale Soil-Structure Interaction Modeling through Analysis of a Geotechnical Laminar Box and Real-time Dynamic Hybrid Simulation
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Soil-structure interaction is broadly assumed to be beneficial, with the incorporation of a flexible soil resulting in period-lengthening of the soil-foundation-superstructure system. However, this a high-level product and does not consider component-levels effects, such as gapping, sliding, uplift, or localized liquefaction. These phenomena are detrimental to the global response of the system and are difficult to capture through conventional analysis. While many methodologies to model soil-structure interaction exist, they all rely on approaches that may be simplified, subject to uncertainties, or based on incompatible test data. The experimental work described herein addresses these limitations and presents a pathway to overcome them.This dissertation develops a framework for full-scale laminar box testing, presents novel sensing techniques to reduce uncertainty, quantifies the mechanics and boundaries of the experimental system, and introduces real-time dynamic hybrid simulation of a superstructure in a controlled environment. These advances enable modeling-of-a-model, wherein phenomena related to soil-structure interaction can be isolated and quantified. This study also documents nearly five hundred dynamic events, curates the raw and derived data sets, and describes the meta-data for the experiments.The laminar box system was quantified through empty box and water only testing thrusts. The interlaminar friction as well as the interface between the base and floor were identified. Damping of the mechanical system was developed both with and without soil and under varying testing conditions. Input dynamic events of varying amplitude and frequency content were used to identify wave propagation through the system and are compared with an industry standard code. Real-time dynamic hybrid simulation of a superstructure was used to shift impedance and resulted in localized liquefaction around a pile foundation group.