NEHRP Clearinghouse
- Title
- Nonlinear Seismic Analysis of Arch Dams.
- File
- PB89194443.pdf
- Author(s)
- Dowling, M. J.
- Source
- National Science Foundation, Washington, DC., September 17, 1987, 188 p.
- Identifying Number(s)
- EERL-87-03
- Abstract
- A nonlinear finite element procedure for arch dams is described in which the gradual opening and closing of vertical contraction joints and predetermined horizontal cracking planes are considered. A special joint element approximately represents the deformations due to plane sections not remaining plane at each open joint and allows a single shell element discretization in the thickness direction to be used for the dam. Compressive and sliding nonlinearities are not included. Finite element treatments are also used for the water, assumed incompressible, and for the foundation rock, assumed massless, with all degrees of freedom (dof) off the dam condensed out. For efficiency in the computations, the condensed water and foundation matrices are localized in a way which maintains good accuracy. The response of Pacoima Dam to the 1971 San Fernando ground motion recorded on a ridge over one abutment and scaled by two-thirds is computed first for water at the intermediate level that existed during the 1971 earthquake and then for full reservoir.
- Keywords
- Cracking (Fracturing); Deformations; Vibration; Seismic prospecting; Arch dams; Graphs (Charts); Earthquake engineering; Joints (Junctions); Static structural analysis; Loads (Forces); Dynamic structural analysis