- Author
-
Glaser, S. D.
- Title
- Estimating Soil Parameters Important for Lifeline Siting Using System Identification Techniques.
- Coporate
- National Institute of Standards and Technology, Gaithersburg, MD
- Report
-
NISTIR 5143,
March 1993,
96 p.
- Distribution
- Available from National Technical Information Service
- Keywords
-
system identification
|
ARMA modeling
|
building technology
|
earthquakes
|
in situ testing
|
lifelines
|
liquefaction
|
spectral analysis
- Abstract
- Liquefaction causes a large portion of all damage done by earthquakes. The damage is especially severe to lifeline structure such as pipelines. This report examines the state-of-the-art of the application of System Identification (SI) methods to the liquefaction problem, with special attention to lifelines. System identification is seen as the best way to ascertain large strain soil properties in situ. A thorough introduction to SI methods and spectral analysis is given. The traditional Fourier-based methods are found to be inexact since the sample variance is equal to the sample mean if averaging techniques are not used. There is an additional problem since earthquake signals are not stationary. Autoregressive-moving average models are seen as a better analysis method, especially the newer adaptive methods that are designed for non-stationary singlans. A significant bibliography is included.