Mathematical Correlation Evaluation between Earthquake Intensity-Energy Parameters and Dynamic Responses of Earth Dam - Case Study: Jamishan Dam

Document Type : Research Article

Author

Kermanshah University of Technology

Abstract

Until now, the seismic behavior of earth dams has been studied in the form of time and frequency analyses. In addition to these two frameworks, the issues of energy and seismic wave intensity are very influential concepts that can be used to evaluate the seismic behavior of earth dams based on them. In this research, the effects of changes in specific energy density and intensity measures of incoming earthquake waves, such as Arias, Characteristic and Housner intensities, on the values of the seismic responses of Jamishan earth-rockfill dam have been studied. Therefore, the two-dimensional finite element modeling of the dam has been implemented in the framework of plane-strain logic and time-history nonlinear dynamic analysis method (NLDAM). In order to reduce and eliminate the unpleasant effects of the return of seismic waves in the lateral end boundaries of dynamic models, the concept of the infinite element with the definition of the pole point has been used. The number of 9 different records of near-fault earthquakes with scaled and un-scaled acceleration amplitudes with different energy contents and seismic intensities have been applied to the dam model. Amplification values of the seismic responses of the dam’s crest compared to the incoming seismic motions in the bed rock have been investigated during the application of different seismic motions. Based on the findings of this study, there is an exponential relationship between the seismic responses of the dam’s crest and the energy and intensity parameters of the input seismic motions .

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Amirkabir Journal of Civil Engineering

Articles in Press, Accepted Manuscript
Available Online from 04 September 2024

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