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强震期间出现的地动将使大型拱坝中央上部大体积混凝土块的动态拉应力超过其动态抗拉强度。由于灌浆垂直收缩缝和水平层间缝的抗拉强度均小于整块大体积混凝土的抗拉强度,收缩缝就可能张开;且由于地动,在其他部位形成裂缝之前就沿着水平层间缝形成了裂缝。介绍了一种使用2D模型分析分离的混凝土块的地震稳定性方法。
The earthquakes that occur during the strong earthquakes will cause the dynamic tensile stress of the large mass concrete block in the central upper part of the large arch dam to exceed its dynamic tensile strength. As the grouting vertical shrinkage seam and the horizontal seam between the tensile strength are less than the bulk concrete mass concrete tensile strength, contraction of the gap may be open; and due to ground movements, before the formation of cracks in other parts along the horizontal between the layers Cracks formed. A method to analyze the seismic stability of concrete blocks separated by 2D model is introduced.