中文摘要：

这份报纸介绍称为一个周期的基础(PF ) 的一个新地震隔离系统，在包括周期性地被安排的地方。PF 与传统的基础隔离不同因为它在结构引起基本频率移动，因此减少它的反应并且产生频率差距。如果一个震波的频率内容掉进差距，它不能在基础宣传。因此，它不对上面的结构施加影响。为 2D PF 的频率差距的乐队的系统的研究被进行。象密度和有弹性的模量以及频率差距的乐队上的 PF 和它的材料的充满的部分那样的物理、几何的参数的影响被调查，并且有象 2.49 鈥 ?.72 Hz 一样低的频率差距的一个图案被完成。频率差距的这个乐队在地震工程对应于很好设计系列。有不同基础的六故事的框架结构的数字模拟证明一个建议 PF 罐头极大地减少孤立的结构的地震反应。这调查证明 PF 在地震隔离技术的未来应用有大潜力。关键词地震隔离 - 周期的基础 - 频率差距的乐队旁边支持了：在资助 No.90715006 下面的中国的国家自然科学基础

英文摘要：

This paper introduces a new seismic isolation system called a periodic foundation （PF）, where inclusions are periodically arranged. The PF is different from traditional base isolation in that it causes a fundamental frequency shift in the structure, thus reducing its response and generating a frequency gap. If the frequency contents of a seismic wave fall into the gap, it can not propagate in the foundation. Thus, it will exert no influence on the structure above. A systematic study of the band of frequency gap for a 2D PF is conducted. The influence of physical and geometrical parameters such as density and elastic modulus as well as filling fraction of the PF and its materials on the band of frequency gap are investigated, and a design with a frequency gap as low as 2.49-3.72 Hz is achieved. This band of frequency gap corresponds well to the design spectra in earthquake engineering. Numerical simulations of a six-story frame structure with different foundations demonstrate that a proposed PF can greatly reduce the seismic response of an isolated structure. This investigation shows that PFs have great potential in future applications of seismic isolation technology.