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چکیده
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The Kahir dam will be the first Faced Symmetrical Hard-fill RCC dam to be constructed in Southeast Iran. Kahir is 53 m high, 370 m long at the crest and contain approximately 510000 m3 of concrete of which some 380000 m3 are RCC. It is a symmetrical trapezoidal-shaped dam with a concrete impervious face in the upstream. From the viewpoint of structural stability, the symmetrical trapezoid- shaped hard-fill dam should have advantages of high safety. In this paper, parametric optimization study was carried- out, the 3D Finite Element method (FEM) was used to analyze the deformations and stresses in dam body and the impervious face under different load cases. Different dam slopes and different foundations rigidity are considered to study the effects of these factors on the behaviors of the dam and its safety. Anisotropic thin element is adopted to simulate the contact between dam body and the impervious face. Comparing to gravity dam section, the characteristics and the distribution laws of the deformations and stresses in Kahir dam body and its impervious face are concluded, and the safety of hard-fill dam is overall evaluated. The results show that the hard-fill dam has greater safety than gravity dam.
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