The present study deals with dynamic analysis of arch concrete dams, taking rotational components of earthquakes into account. A modified methodology was used to evaluate the rotational components of the earthquake. The translational components of the earthquake have been used in to obtain the rotational components of the earthquake, based on the intersecting isotropic elastic wave propagation. Two rotational components of Taft, Tabas and San-Fernando earthquakes are evaluated based on the translational components of the earthquakes and considering frequency dependencies of incident angle and wave velocity. Finally, dynamic analyses of Morrow Point Dam are presented to evaluate the effects of combined translational and rotational components on the seismic response of the dam. Various conditions of reservoirs, including full and empty state, are considered in the analyses. Fluid-structure interaction was completely taken into account. It was realized that incorporating rotational components increased the maximum compressive and tensile stresses in both empty and full reservoir analyses. Distribution of maximum tensile stresses is very sensitive to the rotational components of the earthquake. Also, it can be concluded that the segregated effect of the rocking component on the response of concrete dams is more effective than the sole effect of the torsional component.

中文翻译：

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地震旋转分量对拱形混凝土坝地震响应的影响

本研究考虑到地震的旋转分量，对拱坝进行动力分析。一种改进的方法被用来评估地震的旋转分量。基于相交的各向同性弹性波传播，已将地震的平移分量用于获得地震的旋转分量。塔夫脱地震，塔巴斯地震和圣费南多地震的两个旋转分量是根据地震的平移分量并考虑入射角和波速的频率依赖性来评估的。最后，对Morrow Point大坝进行了动力分析，以评估平移和旋转组合对大坝地震响应的影响。储层的各种条件，包括满和空状态，在分析中考虑。完全考虑了流固耦合。已经认识到，在空储层和全储层分析中，合并旋转分量会增加最大压缩应力和拉伸应力。最大拉伸应力的分布对地震的旋转分量非常敏感。而且，可以得出结论，摇摆分量对混凝土大坝的响应的隔离效应比扭转分量的唯一效应更为有效。最大拉伸应力的分布对地震的旋转分量非常敏感。而且，可以得出结论，摇摆分量对混凝土大坝的响应的隔离效应比扭转分量的唯一效应更为有效。最大拉应力的分布对地震的旋转分量非常敏感。而且，可以得出结论，摇摆分量对混凝土大坝的响应的隔离效应比扭转分量的唯一效应更为有效。