Nonlinear Soil-Structure Interaction Theory for Low-Rise Reinforced Concrete Buildings Based on the Full-Scale Shake Table Test at E-Defense

Abstract eng:
In this paper, nonlinear response analysis and soil-structure interaction theory are presented based on the simulation of the full-scale shake table test to quantify the input loss with the friction at the base. A simple bilinear model was adapted for the hysteresis model of the sliding base foundation. The general reduction in the responses of reinforced concrete buildings is investigated in case of a constant coefficient of friction at the base. The possessing energy of the building structure is conserved while the base slip has been occurred, because the ground acceleration does not act on the structural system. The energy can be evaluated from the velocity and base shear at the start of the base slip. While the base slip has been occurred, the ground acceleration does not act on the structural model because the sway spring doesn’t resist to the transferred shear force at all, and free vibration has been generated between the superstructure and base foundation. A theoretical formula of upper-bound base shear value is derived from the maximum acceleration value, and friction coefficient, which may be used to determine the required lateral load-carrying capacity of the buildings to prevent damages under severe ground motion considering the effect of interaction.

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