基于矩法的高拱壩實際溫度荷載反饋
[Abstract]:Temperature load is one of the main design loads of arch dam, which is closely related to arch sealing temperature, environmental temperature, reservoir water temperature and so on. The actual temperature load is inevitably different from the design temperature load, and the traditional point thermometer has little information on monitoring data. It is difficult to carry out reasonable and effective feedback of temperature load on arch dam. Combined with the distributed optical fiber measured temperature along the river direction of the typical dam segment of Xiluodu High Arch Dam, the actual temperature load feedback of the high arch dam is carried out based on the moment method, that is to say, the equivalent temperature is expressed by polynomial. According to the corresponding moments of the equivalent temperature and the measured temperature along the river direction of the distributed fiber, the coefficient of the polynomial is determined and the distribution of the equivalent temperature is obtained. The analysis shows that the linearized equivalent temperature of the whole section adopted in the existing code is only a special case of the nonlinear equivalent temperature when the first moment is equivalent. The nonlinear temperature distribution of the dam section is obtained by calculating the equivalent temperature of the second and third order moments. A more comprehensive reflection of the dam temperature adjustment process from arch sealing grouting to the normal operation of the reservoir can provide a useful technical supplement for the design of arch dam.
【作者單位】: 蘭州交通大學博文學院;三峽大學水利與環(huán)境學院;甘肅省水利廳;
【基金】:國家自然科學基金資助項目(51209124)
【分類號】:TV642.4
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