ABSTRACT

The uplift effects on the seismic demands of flexible SDOF structures rocking on a stiff surface were numerically investigated, under impulse excitations. The final results were represented in the form of spectra for the seismic demands including the foundation rotation angle, structural drift and base shear. Comparing the results indicated that as the normalized natural frequency surpassed a specific threshold, the drift and base shear of the structure allowed to uplift were more than twice those of corresponding fixed-base structure. Moreover, an increase in structural damping did not necessarily reduce the seismic demands of uplifting systems.

中文翻译：

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放大在刚性基础上摇摆的单自由度系统的地震需求的提升方面

摘要

在脉冲激励下，数值研究了在刚性表面上摇摆的柔性单自由度结构的抗震需求的隆起效应。最终结果以地震需求的频谱形式表示，包括基础旋转角度、结构漂移和基础剪切。比较结果表明，当归一化固有频率超过特定阈值时，允许抬升的结构的漂移和基础剪切是相应固定基础结构的两倍以上。此外，结构阻尼的增加并不一定会降低提升系统的抗震需求。