DYNAMICS OF EARTH DAMS WITH FOUNDATION INTERACTION

AN ANALYTICAL PROCEDURE TO DETERMINE THE DYNAMIC PROPERTIES (NATURAL FREQUENCIES, MODE SHAPES, AND RADIATION DAMPING) OF DAMS INCLUDING FOUNDATION INTERACTION EFFECTS FOR DIFFERENT VALUES OF THE ELASTIC MODULII OF FOUNDATIN AND DAM, AND DAM GEOMETRY, IS DESCRIBED. THE DAM- FOUNDATION SYSTEM IS IDEALIZED AS A PLANE STRAIN PROBLEM. THE DAM IS REPRESENTED AS AN ASSEMBLAGE OF TWO- DIMENSIONAL FINITE ELEMENTS, AND THE FOUNDATION IS CONSIDERED AS AN ELASTIC HALF SPACE. THE NUMERICAL RESULTS INDICATE THAT: (1) FOUNDATION INTERACTION MAY HAVE SIGNIFICANT INFLUENCE ON THE FREQUENCIES AND MODE SHAPES OF VIBRATION OF EARTH DAMS; (2) THE INFLUENCE OF FOUNDATION INTERACTION DEPENDS SIGNIFICANTLY ON THE GEOMETRY OF THE EARTH DAM CROSS SECTION, BEING RELATIVELY MORE IMPORTANT FOR DAMS WITH FLATTER SIDE SLOPES; AND (3) THE MAGNITUDES OF RADIATION DAMPING COMPUTED FOR IDEALIZED DAM-FOUNDATION SYSTEMS APPEAR TO BE UNREALISTICALLY LARGE. FURTHER RESEARCH IS NECESSARY TO OBTAIN REALISTIC ESTIMATES OF RADIATION DAMPING. /ASCE/

  • Availability:
  • Supplemental Notes:
    • Vol 97, No EM 2, PROC PAPER 8049, PP 181-191, 5 FIG, 2 TAB,
  • Authors:
    • Chopra, A K
    • Perumalswami, P R
  • Publication Date: 1971-4

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Filing Info

  • Accession Number: 00235962
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 29 1971 12:00AM