Accession Number : AD0709640

Title :   EARTHQUAKE RESPONSE OF CONCRETE GRAVITY DAMS,

Corporate Author : CALIFORNIA UNIV BERKELEY EARTHQUAKE ENGINEERING RESEARCH CENTER

Personal Author(s) : Chopra,Anil K.

Report Date : JAN 1970

Pagination or Media Count : 40

Abstract : Including reservoir interaction effects, the response of concrete gravity dams to horizontal earthquake excitation was investigated and the errors that may be introduced by common simplifying assumptions such as neglecting interaction effects and compressibility of water were evaluated. The problem was simplified to a linear analysis of the two-dimensional vibration of coupled reservoir-dam systems, with the response of the dam being approximated by its deformations in the fundamental mode. Four cases were considered: dam alone (without reservoir), reservoir-dam system -- interaction neglected, reservoir-dam system -- interaction included, and reservoir-dam system -- interaction included but water compressibility neglected. Expressions were derived for the complex frequency response functions for the dam displacement and lateral hydrodynamic force in each of these four cases. These results along with the Fast Fourier Transform algorithm were utilized to compute the time-history of responses of 28 reservoir-dam systems to Taft earthquake. (Author)

Descriptors :   (*DAMS, *EARTHQUAKES), CONCRETE, INTERACTIONS, WATER, EARTHQUAKE RESISTANT STRUCTURES, FLUID DYNAMICS, FOUNDATIONS(STRUCTURES), RESPONSE, NUMERICAL ANALYSIS

Subject Categories : Seismology
      Civil Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE