Nonlinear soil-structure interaction. Final report

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Abstract
The results are presented of research into modeling of constitutive properties of soil and of soil-structure interaction for nuclear power plants in earthquakes. The models which are developed are general and can be used to simulate a three-dimensional structural geometry, nonlinear site characteristics and arbitrary input ground shaking. This research extends the cap family of constitutive models of soils to include earthquake effects. Also, the cap model is extended to include the effects of pore fluid on the seismic response of soils. In addition, the soil island approach to soil-structure interaction is adapted to seismic problems. Sensitivity of seismic induced soil-structure interaction to the size of soil island is investigated. Application of the soil island approach is made to the SIMQUAKE I series of explosive field test designed to simulate earthquake ground motion effects on model nuclear containment structures. Two- and three-dimensional finite element simulations of the tests are performed and results compared with measured data.

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