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Determination of Peak Impact Force for Buildings Exposed to Structural Pounding during Earthquakes

机译：建筑物暴露于地震结构冲击的峰值冲击力的测定

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Structural pounding between adjacent, insufficiently separated buildings, or bridge segments, has been repeatedly observed during seismic excitations. Such earthquake-induced collisions may cause severe structural damage or even lead to the collapse of colliding structures. The aim of the present paper was to show the results of the study focused on determination of peak impact forces during collisions between buildings exposed to different seismic excitations. A set of different ground motion records, with various peak ground acceleration (PGA) values and frequency contents, were considered. First, pounding-involved numerical analysis was conducted for the basic parameters of colliding buildings. Then, the parametric study was carried out for different structural natural periods, structural damping ratios, gap sizes between buildings and coefficients of restitution. The results of the analysis conducted for the basic structural parameters indicate that the largest response of the analysed buildings was observed for the Duzce earthquake. The parametric study showed that the pounding-involved structural response depended substantially on all parameters considered in the analysis, and the largest response was observed for different ground motions. The results of the study presented in this paper indicate that the value of the peak impact force expected during the time of the earthquake does not depend on the PGA value of ground motion, but rather on the frequency contents of excitation and pounding scenario. It is therefore recommended that the peak impact force for buildings exposed to structural pounding during earthquakes should be determined individually for the specific structural configuration taking into account the design ground motion.
机译：在地震激励期间，在相邻的，不充分的建筑物或桥接段之间的结构敲击已经反复观察到。这种地震诱导的碰撞可能导致严重的结构损坏甚至导致碰撞结构的崩溃。本文的目的是展示研究结果，重点是在暴露于不同地震激励的建筑物之间的碰撞过程中确定峰值冲击力的结果。考虑了一组不同地面运动记录，具有各种峰接地加速度（PGA）值和频率内容。首先，对碰撞建筑物的基本参数进行了涉及涉及的数值分析。然后，参数化研究是针对不同的结构自然周期，结构阻尼比，建筑物和恢复系数之间的间隙尺寸进行。对基本结构参数进行的分析结果表明，为二维地震观察到分析的建筑物的最大反应。参数研究表明，涉及涉及的结构应答依赖于分析中考虑的所有参数，并且对不同的地面运动观察到最大的反应。本文提出的研究结果表明，在地震时间期间预期的峰值冲击力的值不依赖于地面运动的PGA值，而是对激发和冲击场景的频率内容。因此，建议在地震期间暴露于地震结构敲击的建筑物的峰值冲击力应考虑到设计地面运动来单独确定具体的结构配置。

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