Recent Research &amp; Application on Seismic Isolation, Energy Dissipation and Control for Structures in China

Zhou, Fu Lin; Tan, Ping; Jie, Cui; Xian, Qiao Ling; Wei, Lu Shun; Huang, Dong

doi:10.1063/1.2963750

Cited by 1 publication

(1 citation statement)

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“…This system attempts to modify the fundamental frequency of the structure, thereby decreasing its acceleration response. The strategy of adding an isolation system between the base of the structure and the ground will typically result in a structure with a much lower fundamental frequency than the original fundamental frequency of the non-isolated (fixed-base) structure [1][2][3]. According to the acceleration design spectrum, a change in the fundamental frequency of a structure may reduce the acceleration response significantly, thereby enhancing the overall ability of the structure to withstand and survive the earthquake event.…”

Section: Introductionmentioning

confidence: 99%

Periodic materials-based vibration attenuation in layered foundations: experimental validation

Xiang

Shi

Wang

et al. 2012

Smart Mater. Struct.

123

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Guided by the recent advances in solid-state research in periodic materials, a new type of layered periodic foundation consisting of concrete and rubber layers is experimentally investigated in this paper. The distinct feature of this new foundation is its frequency band gaps. When the frequency contents of a wave fall within the range of the frequency band gaps, the wave, and hence its energy, will be weakened or cannot propagate through the foundation, so the foundation itself can serve as a vibration isolator. Using the theory of elastodynamics and the Bloch-Floquet theorem, the mechanism of band gaps in periodic composites is presented, and a finite element model is built to show the isolation characteristic of a finite dimensional periodic foundation. Based on these analytical results, moreover, a scaled model frame and a periodic foundation were fabricated and shake table tests of the frame on the periodic foundation were performed. Ambient, strong and harmonic vibration attenuations are found when the exciting frequencies fall into the band gaps.

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Section: Introductionmentioning

confidence: 99%