NEHRP Clearinghouse
- Title
- Numerical Techniques for the Evaluation of Soil-Structure Interaction Effects in the Time Domain.
- File
- PB83245605.pdf
- Author(s)
- Bayo, E.; Wilson, E. L.
- Source
- National Science Foundation, Washington, DC., February 1983, 176 p.
- Identifying Number(s)
- UCB/EERC-83/04
- Abstract
- A time domain finite element method that efficiently solves the three dimensional soil-structure interaction problem is presented. In addition to all the factors currently considered by frequency domain approaches this new method allows the consideration of the nonlinear effects in the structure and foundation (separation of base mat from soil or nonlinear material). The general equations of motion for the linear cases are expressed in terms of the relative displacements of the soil-structure system with respect to those of the nodes at the foundation level. This formulation allows the load vector to be an exclusive function of the free field accelerations at the soil-structure interface. The energy radiation through the boundaries of the finite element model is accounted for by using frequency independent radiation boundaries obtained from a frequency dependent boundary defined at the fundamental frequency of the soil-structure system.
- Keywords
- Structures; Frequency domains; Equations of motion; Stiffness methods; Numerical integration; Computer applications; Finite element analysis; Earthquake engineering; Soil properties; Soil structure interactions; Time domains; Earthquakes