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本文采用静力有限单元法和动力有限单元法并考虑到尾矿的静力非线性和动力非线性性质,利用等参数单元,详细地分析了德兴铜矿4号尾矿坝的静、动应力和应变。在分析中采用了两种地震曲线,而每种地震曲线又用两种最大加速度(0.2g和0.4g)作为基底输入地震,求得这四种情况下坝体系统内的加速度反应以及应力应变分布规律。此外,在线性弹性的假设下,分析了该坝的自振特性。最后根据求得的动应力时程曲线以及每一单元的应力,利用尾矿的室内三轴试验资料和国外最近发表过的单剪试验资料,对该坝在8度和9度地震情况作了液化分析。
In this paper, the static finite element method and the dynamic finite element method are used, and considering the static nonlinearity and dynamic nonlinearity of the tailings, the static and dynamic behaviors of the No.4 tailings dam in Dexing Copper Mine are analyzed in detail by means of isoparametric elements. Stress and strain. Two kinds of seismic curves were used in the analysis, and each of the two seismic accelerations (0.2g and 0.4g) was used as the base input earthquake. The acceleration response and the stress-strain in these four kinds of cases were obtained Distribution. In addition, under the assumption of linear elasticity, the natural vibration characteristics of the dam are analyzed. Finally, based on the obtained time-history curves of dynamic stress and the stress of each unit, the triaxial test data of tailings and the single-shear test data recently published abroad were used to analyze the dam’s seismic events at 8 and 9 degrees Liquefaction analysis.