DYNAMIC ANALYSIS OF THE SLIDE IN THE LOWER SAN FERNANDO DAM DURING THE EARTHQUAKE OF FEBRUARY 9, 1971

During the San Fernando, California earthquake of February 9, 1971, a major slide occurred in the upstream slope of the Lower San Fernando Dam. Based on data obtained from tests on undisturbed samples, a detailed dynamic analysis of the seismic stability of the embankment is presented. It is concluded that an analysis procedure incorporating: (1) Consideration of the initial static stresses in the embankment; (2) the use of a dynamic finite element analysis procedure to determine the dynamic stresses induced in individual elements of the embankment by the earth quake; (3) the use of cycle loading triaxial compression test data to determine the response of the soil elements to the induced stresses; and (4) consideration of progressive failure effects provides a satisfactory basis for assessing the stability of the embankment. This type of analysis indicates the development of a zone of liquefaction along the base of the upstream shell that would be sufficiently extensive near the end of the earthquake shaking to lead to a condition of instability. /ASCE/

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  • Accession Number: 00127121
  • Record Type: Publication
  • Report/Paper Numbers: ASCE #11541 Proceeding
  • Files: TRIS
  • Created Date: Dec 29 1975 12:00AM