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چکیده
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Faced symmetrical hard-fill dams (FSHD) and concrete faced rock-fill dams (CFRD) have symmetrical trapezoid-shaped cross section with concrete face slab in upstream which prevent water penetration into dam body. Usually trapezoid-shaped dams have much bigger weight than conventional gravity dams. Therefore, they do not require the high shear strength of bedrock in order to satisfy the safety against sliding. As results, trapezoid-shaped dams can be constructed even on the poor foundation. In this paper, properties and respected cost of the materials for FSHD and CFRD dams were compared, also both of dams have been evaluated technically and economically. Static and dynamic analysis for both of dams were performed by use of finite element software’s (ANSYS for FSHD dam and PLAXIS for CFRD dam) and safety of them were evaluated against static and dynamic loads keeping height ,level of reservoir and dynamic loads same for both of the dams. The results show that FSHD and CFRD dams are safe against applied loads, but the deformation obtained in FSHD dam is smaller than CFRD dam. From construction point of view FSHD dam is more economical than CFRD dam for dam site with high flood rivers.
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