基于薄拱坝坝体屈曲失稳理论,将浅拱非线性屈曲理论引入到拱坝的水平拱圈屈曲计算中,通过定量简化计算分析,得出了拱坝柔度系数上限值与坝高之间的非线性函数关系式;同时基于新版《水工设计手册》(以下简称《手册》)中国内外已建高拱坝参数,考虑坝高H、弧高比及河谷形状等对拱坝柔度系数的影响,给出了经验性的拱坝柔度系数上限值公式。通过对已建拱坝柔度系数计算比较分析,认为提出的拱坝柔度系数上限值公式具有一定参考价值。
Abstract
On the basis of the theory of thin arch dam’s buckling instability, the nonlinear buckling of shallow arch is introduced into the calculation of horizontal arch ring’s buckling for arch dam. The nonlinear functional relationship between the maximum flexibility coefficient and the dam height is obtained by simplifying quantitative calculation and analysis. Furthermore, according to the parameters of built arch dam at home and abroad in the latest version of Hydraulic Design Manual, the empirical formula of flexibility coefficient is given in consideration of the impact of dam height H, arc length-height ratio, and valley shape. Calculations for some built arch dams with this formula verified that this formula is valuable in the actual design.
关键词
拱坝屈曲稳定 /
柔度系数 /
弧高比 /
非线性屈曲
Key words
buckling stability of arch dam /
flexibility coefficient /
arc length-height ratio /
non-linear buckling
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参考文献
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