Geological and Seismological Factors for Design Earthquakes, Patoka Damsite, Indiana.
Abstract
Patoka damsite is in an area of appreciable past seismic activity. Activity along surface faults has not been determinable, so future seismic events must be postulated as likely to occur anywhere within certain zones. These zones were based on work by Professor Otto W. Nuttli and a review of seismic history. The most damaging earthquake with its peak recurrent ground motions is postulated as follows: magnitude, 6.1; acceleration, 0.11-0.44 g; velocity, 54 cm/sec; displacement, 26 cm; duration, 68 sec. If the earthquake occurred beneath the dam, it might contain high-frequency acceleration spikes at levels up to 0.9 g. The acceleration of 0.11 g (Nuttli) is presented as a lower limit; California experience shows that accelerations of 0.44 g are to be expected for earthquakes of comparable magnitude. In the absence of strong motion records in the central United States, the range is, therefore, 0.11 to 0.44 g. Velocities and displacements compare favorably with West Coast experience. Maximum duration is four times that of the West Coast value for earthquakes of comparable magnitude.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1972
- Accession Number
- ADA035984
Entities
People
- Ellis L. Krinitzsky