混凝土大壩外文翻譯--混凝土重力壩的設(shè)計(jì)分析與比較(已修改)
2025-05-31 21:44 本頁(yè)面
【正文】 中文 3018 字 Comparison of Design and Analysis of Concrete Gravity Dam ABSTRACT Gravity dams are solid concrete structures that maintain their stability against design loads from the geometric shape, mass and strength of the purposes of dam constr uction may include navigation, flood damage reduction,hydroelectric power generation, fish and wildlife enhancement,water quality,water supply,and design and evaluation of concrete gravity dam for earthquake loading must be based on appropriate criteria that reflect both the desired level of safety and the choice of the design and evaluation Bangladesh, the entire country is divided into 3 seismic zones, depending upon the severity of the earthquake intensity. Thus, the main aim of this study is to design high concrete gravity dams based on the . remendations in seismic zone II of Bangladesh, for varying horizontal earthquake intensities from g g with g increment to take into account the uncertainty and severity of earthquake intensities and constant other design loads, and to analyze its stability and stress conditions using analytical 2D gravity method and finite element method. The results of the horizontal earthquake intensity perturbation suggest that the stabilizing moments are found to decrease significantly with the increment of horizontal earthquake intensity while dealing with the . Remended initial dam section, indicating endanger to the dam stability, thus larger dam section is provided to increase the stabilizing moments and to make it safe against failure. The vertical, principal and shear stresses obtained using ANSYS analyses are pared with those obtained using 2D gravity method and found less pares to 2D gravity method, except the principal stresses at the toe of the gravity dam for g g. Although, it seems apparently that smaller dam section may be sufficient for stress analyses using ANSYS , it would not be possible to achieve the required factors of safety with smaller dam is observed during stability analyses that the factor of safety against sliding is satisfied at last than other factors of safety, resulting huge dam section to make it safe against sliding. Thus, it can be concluded that it would not be feasible to construct a concrete gravity dam for horizontal earthquake intensity greater than g without changing other loads and or dimension of the dam and keeping provision for drainage gallery to reduce the uplift pressure significantly. Keywords: Comparison Concrete Gravity Dam Dam Failure Design Earthquake Intensity Perturbation Stability and Stress Basically, a gravity concrete dam is defined as a structure,which is designed in such a way that its own weight resists the external forces. It is primarily the weight of a gravity dam which prevents it from being overturned when subjected to the thrust of impounded water [1]. This type of structure is durable, and requires very little maintenance. Gravity dams typically consist of a non overflow section(s) and an overflow section or spillway. The two general concrete construction methods for concrete gravity dams are conventional placed mass concrete and RCC. Gr
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