YOU Chaofan,WANG Guobo,JIN Yangbin.Research on the Seismic Isolation Performance of Independent Periodic Foundations[J].Journal of Disaster Prevention and Mitigation Engineering,2024,44(05):1072-1083.
YOU Chaofan,WANG Guobo,JIN Yangbin.Research on the Seismic Isolation Performance of Independent Periodic Foundations[J].Journal of Disaster Prevention and Mitigation Engineering,2024,44(05):1072-1083. DOI: 10.13409/j.cnki.jdpme.20230527001.
Research on the Seismic Isolation Performance of Independent Periodic Foundations
Solid-state physics has revealed that periodic structures exhibit unique attenuation domain characteristics
where elastic waves within the attenuation frequency range cannot propagate through periodic structures. This principle can be applied to seismic isolation in civil engineering. Taking a four-story frame structure as an example
this paper employed numerical analysis to explore the isolation effect of an independent layered periodic foundation composed of rubber and concrete. The main influencing factors considered included the type and amplitude of seismic motion
rubber layer thickness
number of layers
and elastic modulus. Comparative analysis showed that the isolation effect of independent periodic foundations on high-frequency seismic waves was significantly stronger than on low-frequency seismic waves. As the amplitude of seismic waves increased
the isolation performance of the periodic foundation gradually decreased. Material parameters played a decisive role in the isolation performance
with structural stiffness decreasing as the thickness and number of rubber layers increased
and increasing with a higher rubber elastic modulus. The maximum attenuation in structural acceleration due to periodic foundations reached up to 53.2%. The research results can provide valuable insights for the practical application of layered periodic foundations.
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