NEHRP Clearinghouse
- Title
- Vertical and Torsional Stiffnesses of Cylindrical Footings.
- File
- PB293997.pdf
- Author(s)
- Kausel, E.; Ushijima, R.
- Source
- National Science Foundation, Washington, DC., February 1979, 78 p.
- Identifying Number(s)
- R79-6
- Abstract
- A numerical evaluation of the vertical and torsional stiffnesses of a cylindrical foundation embedded in an elastic stratum is presented. Empirical formulas are given that relate stiffnesses and damping values with the embedment ratio and the depth of the stratum. Good agreement is found between the reported approximations and available analytical solutions for particular geometries. This report constitutes a continuation of an earlier work by Elsabee and Morray in which the translation and rocking modes of vibration were studied.
- Keywords
- Structures; Cylindrical bodies; Earthquake resistant structures; Stiffness methods; Finite element analysis; Ground motion; Earthquake engineering; Soil dynamics; Soil structure interactions; Foundations; Footings; Dynamic structural analysis