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Elasto-plastic earthquake response of arch dams including fluid-structure interaction by the Lagrangian approach

机译：拉格朗日方法的拱坝弹塑性地震反应包括流固耦合

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Elasto-plastic earthquake response of arch dams including fluid-structure interaction by the Lagrangian approach is mainly investigated in this study. To this aim, three-dimensional eight-noded version of Lagrangian fluid finite element including the effects of compressible wave propagation and surface sloshing motion, and three-dimensional version of Drucker-Prager model based on associated flow rule assumption were programmed in FORTRAN language by authors and incorporated into the program NONSAP. Two new components added into the NONSAP were tested on a simple fluid tank and a simple fluid-structure system and obtained very reasonable results.rnElasto-plastic earthquake analysis of an arch dam including fluid-structure interaction by the Lagrangian approach was performed using Wilson-θ method. The El Centro N-S component of Imperial Valley earthquake in 1940 was chosen as a ground motion. The component considered was applied in upstream-downstream direction.rnDisplacements at various nodes on dam body, hydrodynamic pressures at three fluid elements near the dam-reservoir interface and yield functions at two elements predicted cracks in dam body were obtained. The elasto-plastic response of the arch dam was also compared to its linear response. It is seen that Drucker-Prager model in the representing elasto-plastic behaviour of arch dams and in estimating location of cracks in dam body is a fast tool.
机译：本研究主要研究拉格朗日方法对拱坝的弹塑性地震反应，包括流固耦合。为此，用FORTRAN语言对拉格朗日流体有限元的三维八节点版本（包括可压缩波传播和表面晃动的影响）以及基于相关流规则假设的Drucker-Prager模型的三维版本进行了编程。作者并纳入NONSAP计划。在一个简单的储油罐和一个简单的流体结构系统上对添加到NONSAP中的两个新组件进行了测试，并获得了非常合理的结果。rn采用拉格朗日方法对拱坝进行了包括塑性相互作用在内的拱坝的弹塑性地震分析。 θ法。 1940年帝国谷地震的El Centro N-S分量被选作地面运动。所考虑的分量沿上游-下游方向施加。获得了坝体各个节点的位移，在坝-水库界面附近的三个流体单元的流体动压以及在两个元素预测的坝体裂缝的屈服函数。还比较了拱坝的弹塑性响应与其线性响应。可以看出，Drucker-Prager模型在表示拱坝的弹塑性行为和估算坝体裂缝位置方面是一种快速的工具。

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