An Earthquake Analysis of the Liquefaction Potential at the Naval Air Station, North Island.
Abstract
The loss of strength experienced by saturated cohesionless soils during earthquake or shock loading is generally referred to as liquefaction. The hazard potential existing at Naval Air Station, North Island, California, due to this phenomenon is evaluated herein, including both a statistical evaluation of potential earthquake levels and an appraisal of the magnitudes of damage. Knowledge of the in-situ soils was used in conjunction with earthquake-response predictions in the most recent state-of-the-art prediction procedures. Problems encountered in making liquefaction evaluations are discussed in some detail. These problems include predicting the magnitude and recurrence rates (frequency) of ground motions to be expected, determining the true nature of the subsurface soils, and finally evaluating the effect of the applied ground motions on these subsurface soils. This report concludes that although most of North Island is underlain by natural sands which should be fairly resistant to liquefaction, limited regions with very high liquefaction potential exist. These regions would be expected to liquefy under earthquake levels used for engineering analysis, and present a high damage potential to such critical structures as the carrier docking facilities, aviation fuel tank farms, and service lines. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1976
- Accession Number
- ADA033493
Entities
People
- J. Ferritto
- J. Forrest
Organizations
- Naval Facilities Engineering Service Center