Ultimate bearing capacity of concrete dam involved in geometric and material nonlinearity
Ultimate bearing capacity of concrete dam involved in geometric and material nonlinearity
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DOI：
10.1007/s11431-010-4281-0
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发表时间：
2011-02
期刊：
影响因子：
--
通讯作者：
Q. Ren;Yazhou Jiang
中科院分区：
文献类型：
--
作者：
Q. Ren;Yazhou Jiang
为了得到混凝土坝的实际极限承载力，研究了混凝土坝破坏过程中出现的几何非线性和应变软化对极限承载力的影响。考虑材料本构关系中的应变软化、几何方程中的几何非线性和平衡微分方程中的几何非线性，采用超载法计算混凝土坝的承载能力。采用弧长法寻找大坝荷载-位移曲线的极值点和下降支点。结果表明，这种影响是不容忽视的。混凝土坝极限承载力的数值分析应考虑结构的几何非线性和材料的应变软化。
To get the actual ultimate bearing capacity of concrete dam, the effect of geometric nonlinearity and strain softening on it, which appears in the failure process of concrete dam, is studied. Overload method is adopted to obtain the bearing capacity of a concrete dam by taking into consideration strain softening in the material constitutive law, geometric nonlinearity in geometric equation and equilibrium differential equation. Arc-length method is used to find the extreme point and descending branch of the load-displacement curve of the dam. The results present that the effect cannot be ignored. And geometric nonlinearity of structure and strain softening of materials should be considered for numerical analysis of ultimate bearing capacity of a concrete dam.