Finite Element Stress Analysis with Consideration of Equivalent Stress in ANSYS – Case Study of Namchien Dam under Static and Dynamic Conditions

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A research on numerical modeling of arch dam with contraction joints under static and seismic conditions is performed in this study. Discussions on the use of the adaptive finite element method with consideration of the “equivalent stress” and simulating technique for the contact between dam segments are presented. A case study of stress analysis for the Namchien hydropower arch dam in Vietnam is given. The results showed that the numerical model established in this paper is effective to simulate complex physical models. The stability analysis is easily performed by using the self-adapting technique with consideration of equivalent stress, and the contraction joints between dam segments can be successfully simulated by assigning zero-thickness contact elements to control complex contact behaviors, such as slip, opening or closing of the contact surfaces. The results of this study will be a useful reference for the assessment of the dam safety in the future.

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270-276

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June 2012

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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