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本文根据现代钢筋混凝土面板堆石坝的特点,提出三线非线性有限元静力动力分析方法。在分析中,考虑了堆石材料的非线性、堆石与面板接触面的非线性,面板的伸缩缝和周边缝内止水连接材料的非线性,考虑了坝——水的动力相互作用。在动力分析中,输入三个方向的地震加速度过程线,在逐步数值积分和迭代时,各时段均改变动力参数和自振频率。采用空间等参单元,对某坝作了实算,提供了坝体及面板的三向静动变形和应力、伸缩缝和周边缝的三向静动变形等成果,并提供了面板的抗震稳定安全系数过程线。
According to the characteristics of modern reinforced concrete face rockfill dam, a three-line nonlinear finite element method of static dynamic analysis is proposed. In the analysis, the non-linearity of rockfill materials, the nonlinearity of rockfill-face contact, the expansion joints of faceplates and the non-linearity of the water-stop materials in the peripheral joints are considered, and the dam-water dynamic interaction is considered. In the dynamic analysis, the seismic acceleration process lines in three directions are input, and dynamic parameters and natural frequencies are changed in each time step in the process of numerical integration and iteration. Adopting spatial isoparametric unit, the actual calculation of a dam provides the three-direction static and dynamic deformation and stress of the dam body and the panel, the three-direction static and dynamic deformation of the expansion joint and the peripheral seam, and provides the seismic stability of the panel Safety factor process line.