壩的老化 的英文怎麼說
中文拼音 [bàdelǎohuà]
壩的老化
英文
ageing of dam-
This paper establishes a model simulating dam actual placing process and considering the non - continuity of initial temperature on the boundary of new and old concrete, daily air temperature change, concrete - placing temperature, hydration heat, heat insulation on boundary, water - storing process, placing intermission and curing with water. the calculation of stress field considers the concrete weight, static water pressure, thermal stress, different autogenous volume change between rcc and normal concrete, change of elastic modulus of concrete with age and creep action
考慮了乞今最為全面的初始條件和邊界條件，包括模擬壩體的實際升程過程，考慮了新老混凝土接觸面上的初始溫度不連續，逐日的氣溫變化，混凝土的入倉溫度，水化熱溫升，邊界保溫，水庫蓄水過程，澆築間歇以及灑水養生等因素；應力場的計算考慮了混凝土的自重，靜水壓力，溫度應力，常態混凝土與碾壓混凝土不同的自生體積變形，混凝土的彈性模量隨齡期的變化以及徐變的作用。( 6 ) through studying the aging character of composite geomembrane and the relationship between stress or strain with tune, the corresponding curve was fitted and its current of development was forecasted, in the last, combining the stress of dam calculated, the suit composite geomembrane was selected
（ 5 ）採用鄧肯模型對未加固前的大壩進行非線性有限元分析，研究了大壩加固前的初始位移應力狀態； （ 6 ）對復合上工膜的老化性能進行長期試驗研究，分析其應力應變隨時間的變化規律，擬合出相應的曲線，預測其發展趨勢。The life span of the proper geomembrane used in dam under water can reach over 100 years. it can be used in the earth and rockfill dams with more than 100m heights
在壩內和水下的土工膜，老化速度非常緩慢，某些土工膜在壩內水下使用壽命可達百年以上。
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