Cyclic lateral-loading centrifuge tests were performed on a model of an embedded foundation using the 100 g-ton RPI centrifuge facility. The purpose of these tests was to study the lateral response of the embedded footing at various displacementlevels up to failure. A reinforced concrete footing has been modeled with prototype dimensions of 1.14×1.14×0.84 m (1×w×h). Dry Nevada sand of 75 % relative density was used. The results are relevant to shallow foundations and embedded pile caps. Thetests' objective was to evaluate the relative contributions to total lateral response of the base, shearing sides, and active/passive sides of the foundation, as well as any possible interaction between these partial contributions. Lateral responseparameters studied included secant stiffness and material damping ratio at various displacement amplitudes, and ultimate lateral capacity.
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