NEHRP Clearinghouse
- Title
- Dynamic Response of Three-Dimensional Rigid Embedded Foundations.
- File
- PB296617.pdf
- Author(s)
- Luco, J. E.; Frazier, G. A.; Day, S. M.; Apsel, R. J.
- Source
- National Science and Research Applications., January 1978, 108 p.
- Abstract
- The project was addressed to the study of the dynamic response of rigid three-dimensional foundations embedded in the soil and excited by external forces as well as by different types of seismic waves. The response of foundations to these types of excitations plays a key role in the evaluation of the response of structures to wind and earthquake loads. Two methods to obtain the dynamic response of foundations were developed and tested. The first method is based on performing a transient finite element analysis for a set of impulsive motions of the foundation. This method eliminates the nonphysical reflections from the model's boundaries, and is more efficient than other finite element analyses in the frequency domain. The second method is based on an integral equation formulation of the boundary-value problem which employs the Green's functions for layered viscoelastic media. The accuracy of both methods was tested by cross-comparison and by comparison with available analytical solutions.
- Keywords
- Earthquake resistant structures; Seismic waves; Ocean bottom; Pile structures; Finite element analysis; Ground motion; Earthquake engineering; Dynamic response; Greens function; Soil structure interactions; Rigid foundations; Earthquakes; Dynamic structural analysis