NEHRP Clearinghouse
- Title
- Design Approaches for Soil-Structure Interaction.
- File
- PB89174437.pdf
- Author(s)
- Veletsos, A. S.; Prasad, A. M.; Tang, Y.
- Source
- National Science Foundation, Washington, DC., December 30, 1988, 50 p.
- Identifying Number(s)
- NCEER-88-0031
- Abstract
- Exact seismic response analysis of a structure requires that the structure be considered to be part of a larger system which includes the foundation and supporting medium, and that due cognizance be taken of the spatial variability of the ground motion and of the properties of the soils involved. A two step analysis involving the foundation motion considering both foundation and the superimposed structure to be massless may be implemented. The resulting motion, foundation input motion (FIM), generally includes torsional and rocking components in addition to translational components. The difference in the response of the superstructure computed for the FIM and the free-field control point motion (CPM) represents the kinematic interaction (KI) effect, whereas the difference of the responses computed with and without regard for the flexibility of the support medium is known as the inertial interaction (II) effect.
- Keywords
- Earthquake resistant structures; Deformation; Seismic waves; Kinematics; Torsion; Damping; Mathematical models; Superstructures; Response; Inertia; Foundations; Motion; Design criteria; Soil structure