Preliminary Report on the Seismological and Engineering Aspects of the October 17, 1989 Santa Cruz (Loma Prieta) Earthquake

摘要

Researchers from the University of California at Berkeley were sent throughout the San Francisco Bay Area immediately following the Santa Cruz (Loma Prieta) earthquake of October 17, 1989. In addition to teams focusing on the geophysical and geological aspects of the event, engineering teams focused on the behavior of soils and soil structures and on damage to transportation facilities, buildings, industrial facilities, and coastal structures. The report has been prepared in response to the widespread interest in this earthquake. It contains preliminary information and observations regarding several aspects of the earthquake: the seismological and geophysical aspects of the earthquake, its relation to past and potential future earthquakes in the area, and the distribution of ground motion intensity throughout the Bay Area; the distribution of liquefaction and other soil failures, as well as landslides; the significant influences that ground amplification had on the distribution of apparent structural damage throughout the Bay Region; the performance of concrete freeway structures throughout the shaken region; the failure of a portion of the San Francisco Bay Bridge and preliminary observations as to the cause of this damage; the distribution and types of structural damage observed in the Bay Area.