Seismic isolation of buildings on two dimensional phononic crystal foundation

[摘要] In order to realize the seismic isolation of buildings, we establish the two dimensional phononic crystal (PC) foundation which has the cell with the size close to the regular concrete test specimens, and is composed of the concrete base, rubber coating and lead cylindrical core. We study the in-plane band gap (BG) characteristics in it, through the analysis of the frequency dispersion relation and frequency response result. To lower the start BG frequency to the seismic frequency range, we also study the influences of material parameters (the elastic modulus of coating and density of cylindrical core) and geometry parameters (the thickness of coating, radius of cylindrical core and lattice constant) on BG ranges. The study could help to design the PC foundation for seismic isolation of building.

[发布机构] College of Mechanics and Materials, Hohai University, Nanjing; 211100, China^1;Department of Geotechnical Engineering, Nanjing Hydraulic Research Institute, Nanjing; 210024, China^2

[效力级别] 生态环境科学

[关键词] Cylindrical cores;Frequency dispersion;Geometry parameter;Material parameter;Seismic isolation of buildings;Seismic-frequency range;Test specimens;Two-Dimensional Phononic Crystals