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۱Numerical Study of Depth Hydrograph in Flood Plain and Reservoir due to Breach in the Dam
نویسنده(ها):
اطلاعات انتشار: اولین کنفرانس بین المللی و سومین کنفرانس ملی سد و نیروگاههای برق آبی، سال
تعداد صفحات: ۹
In this paper, the application of a high–resolution numerical scheme in estimation of depth hydrograph in the flood plain and reservoir of a dam due to breach in the dam is presented. Two–dimensional governing equations of the unsteady flow are discretized in finite–volume framework. The numerical method actually combines fluxvector and flux–difference splitting schemes to derive precise numerical flux at the cell interfaces of the mesh. An accurate fourth–order Runge–Kutta method has been employed for numerical integration. The numerical model has been verified bycomparison of the results with available experimental data. The results showsatisfactory agreement between experimental and numerical data. The simulated depth hydrographs can be used for early warning systems to decrease the extent of the loss due to dam failure<\div>

۲Reliability analysis of embankments using stochastic finite element method
نویسنده(ها): ، ،
اطلاعات انتشار: هفتمین کنگره ملی مهندسی عمران، سال
تعداد صفحات: ۷
Embankments are impounding structures made from compacted soil. Several methods can be used for determining mechanical behavior of these structures. Among them, the deterministic Finite Element Method (FEM) is a powerful method for this purpose. The main drawback in the application of this technique generally arises from the large uncertainties affecting the mechanical properties of materials in the model. Hence, finite element method in conjunction with stochastic analysis methods should then be used to assess the results of the analyses in probabilistic terms. In this paper, the usefulness of this approach for engineering purposes is investigated by analyses of embankments constructed by compacted soil. Finite element analyses are performed together with Monte Carlo simulations (MCs) and Point Estimate Method (PEM) and the results are compared. The results show that this technique can be useful to evaluate the relative influence of each designing parameters. Uncertainties affecting vertical displacements which may influence a large earth dam are also presented.<\div>

۳Stochastic Finite Element Method for Reliability Analysis of Earth Structures
نویسنده(ها): ، ، ،
اطلاعات انتشار: اولین کنفرانس ملی مهندسی ژئوتکنیک، سال
تعداد صفحات: ۸
The stochastic finite element method aims at constructing a probabilistic representation of the responseof a mechanical system, whose material properties are random fields. The response quantities, can be thenodal displacements, are represented by a polynomial series expansion in terms of standard normalrandom variables. This expansion is usually post–processed to obtain the second–order statisticalmoments of the response quantities. However, in the literature, the stochastic finite element method hasalso been suggested as a method for reliability analysis. In this study, the stochastic finite element methodis considered in conjunction with the first–order reliabilitymethod for finite element reliabilityanalysis.The results show that this technique can be useful to evaluate the relative influence of eachdesigning parameters. Uncertainties affecting vertical displacements which may influence a foundationsare also presented<\div>
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