Application of dominant frequency for nonlinear dynamic analysis of embankment during an earthquake | |
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( Volume 1 Issue 2,August 2015 ) OPEN ACCESS | |
Author(s): | |
Behrouz Gordan, Azlan Adnan | |
Abstract: | |
In terms of embankment analysis, huge damages were reported in embankments under strong earthquakes. Due to nonlinear dynamic analysis of embankment during an earthquake, one of the main factors is dominant frequency. Based on technology development using finite element programs, numerical methods were used to assess frequency. The aim of this study is evaluation of dominant frequency in the embankment for different situations such as configuration and soil properties. For this purpose, Ansys13 program based on Finite-Element Method (FEM) was applied to compute dominant frequency using modal analysis. Response spectrum analysis and nonlinear analysis are belonging to the dominant frequency. This paper presents two main purposes. Both effects such material property and dam configuration on dominant frequency were investigated in this study. The amplitude of dam height was in the range of 30 meter to 90 meter. As a result, dominant frequency curve were plotted for different condition to use. They were very applicable for spectrum analysis and computing the Rayleigh damping coefficient in terms of nonlinear dynamic analysis. Consequently, the low impact was found on dominant frequency by using both parameters such as different slopes and Poisson's ratio. The major effects were subjected to structural height, elasticity modulus, and relative density, respectively |
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