An Application of the Proposed Complex Damping Model to the Dynamic Analysis of an Actual Dam

Seismic analysis of fill-type dams (II)

Abstract

Complex damping model was proposed in the previous paper, representing both viscous and hysteretic damping forces developed in a vibrated system.This model is now applied to the dynamic analysis of an actual dam, Nakasato Dam, which is one of the largest earth dams in our country.
During a small earthquake of Aug.6, 1977, seismic response was recorded by the instruments buried at several points in the embankment.Comparing the records with the results analysed using the proposed damping model, an appropriate agreement was obtained except for some differences in the amplitude of the absolute acceleration at the crest, probably caused in idealizing the structure.
This paper consists of the following three parts:
(1) Explanation of the complex damping model and the procedure for the application to the analysis.
(2) Details of static and dynamic analysis procedures used in this investgation in relation to other procedures.
(3) Comparison between the records and calculated responses.