EVALUATION OF SEISMIC SLOPE-PERFORMANCE MODELS USING A REGIONAL CASE STUDY
This paper compares four permanent displacement models based on Newark's sliding-block analogy for assessing regional seismic slope-performance. The models vary primarily by the ground-motion descriptor used to correlate with Newmark displacement. The first uses peak ground-acceleration (PGA). The second uses PGA but normalizes displacements by predominant period and equivalent cycles. The third uses Arias intensity. The fourth calculates cumulative displacements from double-integrating simulated earthquake accelerograms. The models are implemented in a GIS to characterize seismic slope-performance maps for the Oakland East quadrangle near San Francisco, California. The resulting slope-performance maps are compared visually and through statistical analysis to expose potential differences and assess the effects of using a particular approach within a decision-making context. These maps were created for the purpose of comparison and are not suitable for use as critical decision-making tools. The models forecast notably different levels of slope-performance, with the PGA-based models predicting the greatest Newmark displacement on average. Thus, considering the variety of slope-performance models, it is suggested that practitioners avoid reliance on a single model. Instead, multiple models can be implemented in a GIS framework to gain a better perspective of the potential hazard and make a more informed decision. (A)
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/10787275
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Corporate Authors:
ASSOCIATION OF ENGINEERING GEOLOGIES AND THE GEOLOGICAL SOCIETY OF AMERICA
DEPARTMENT OF GEOLOGY & GEOPHYSICS, TEXAS A&M UNIVERSITY
COLLEGE STATION, TEXAS United States 77843-3115 -
Authors:
- MILES, S B
- KEEFER, D K
- Publication Date: 2000-2
Language
- English
Media Info
- Features: References;
- Pagination: p. 25-39
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Serial:
- ENVIRONMENTAL & ENGINEERING GEOSCIENCE
- Volume: 6
- Issue Number: 1
- Publisher: Texas A&M University, College Station
- ISSN: 1078-7275
Subject/Index Terms
- TRT Terms: Forecasting; Landslides; Mathematical models; Simulation; Slope stability
- ITRD Terms: 132: Forecast; 4029: Landslide; 6473: Mathematical model; 9103: Simulation; 5783: Slope stability
- Subject Areas: Geotechnology;
Filing Info
- Accession Number: 00795101
- Record Type: Publication
- Source Agency: Transport Research Laboratory
- Files: ITRD
- Created Date: Jul 7 2000 12:00AM