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Response of tall buildings to base rocking induced by Rayleigh waves

机译：高层建筑对瑞利波引起的基岩的响应

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By now, it is well known that long-period surface waves can induce resonant response in high-rise buildings, in particular those located in sedimentary basins. Rayleigh wave passage has been reported to induce rocking motion at the base of the buildings which can increase displacement demands significantly. However, the building behavior to base rocking has not been extensively studied because commercially available instruments do not record rotational components of ground motion, and thus, rocking time histories have not been available to the analysts. In a recent study, we proposed an effective method for estimating the rocking associated with Rayleigh waves, which takes into account their frequency-dependent phase velocities. In the present work, we select a number of recorded seismic motions which include surface waves on sedimentary basins from recent well-recorded earthquake events. Then, we proceed to identify and extract the recorded surface waves by using the technique mentioned above. Using realistic soil-structure analytical models that have been proposed in the published literature for high-rise buildings, we study their response to Rayleigh waves as they respond to both translational and rocking motions. Of particular interest is to compare the response of such structures with and without the presence of rotational motions due to surface waves. Using the roof displacement and the building interstory drift as response quantities, our results indicate that demands are controlled by rotational (rocking) motions associated with Rayleigh waves.
机译：到现在为止，众所周知，长周期的表面波可以在高层建筑中，特别是在沉积盆地中的建筑物中引起共振响应。据报道，瑞利波通过会引起建筑物底部的摇摆运动，这可能会大大增加位移需求。然而，由于可商购获得的仪器未记录地面运动的旋转分量，因此尚未对基础摇摆的建筑物行为进行广泛研究，因此，分析人员无法获得摇摆时间的历史记录。在最近的研究中，我们提出了一种有效的方法来估计与瑞利波相关的摇摆，并考虑了它们与频率有关的相位速度。在目前的工作中，我们选择了许多已记录的地震运动，其中包括最近记录良好的地震事件中沉积盆地上的表面波。然后，我们继续使用上述技术来识别和提取记录的表面波。使用已发表文献中针对高层建筑提出的逼真的土壤结构分析模型，我们研究了它们对瑞利波的响应，因为它们既响应平移运动也响应摇摆运动。特别感兴趣的是比较这种结构在存在和不存在由于表面波引起的旋转运动的情况下的响应。使用屋顶位移和建筑物层间位移作为响应量，我们的结果表明需求受与瑞利波相关的旋转（摇摆）运动控制。

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