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)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/10787275
• 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
• 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