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E0-190-2008_(5)Review_of_SSI - Dynamic Soil Structure...

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Kenji MIURA, Dr. Eng. Professor Graduate School of Engineering Hiroshima University Dynamic Soil Structure Interaction Review
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(1) What is SSI . (2) What kinds of phenomena are caused by SSI. (3) In order to consider the effect of SSI on the response of structure, the soil-structure interaction system ( Coupling system ) is modeled by Sway-Rocking Model . (4) The Sway-Rocking Model is supported by " Dynamic Impedance Function ", and is subject to " Foundation input motion " as an earthquake disturbance.
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(5) The Dynamic Impedance Functions are expressed by complex numbers. The real part of the Dynamic Impedance Function corresponds to the dynamic stiffness , and the imaginary part is related to damping . Dividing the imaginary part by circular frequency , the damping coefficient C is obtained. (6) This damping is attributable mostly to the radiation wave emitting from the foundation into soil. Particularly, this damping is called "
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