Abstract: The seismic waves propagating in the earth mainly include body wave and surface wave, and Rayleigh wave in surface wave has the strongest damage to buildings. For the vibration control of Rayleigh waves, a Tian-shaped metamaterial structure was proposed. Compared with the traditional seismic metamaterials, this metamaterial barrier is composed of a nested cross column inside an external oral frame, forming four filling areas. The external frame is partially embedded, with high strength, strong stability and flexible filling methods. The band structure and transmission characteristics of Tian-shaped metamaterial were calculated by finite element method. By analyzing the mode shapes at the band gap boundary, it is found that the band gap opening is due to the local resonance of the cylinder. Combined with the band gap mechanism, different amounts of filling in the cylinder structure can change the quality of the column structure, form different resonant frequencies, and produce a very low frequency band gap. Furthermore, the mass filling methods with positive and negative gradients were designed and studied to broaden the band gap, and 3.3~13.1 Hz very low frequency broadband gap can be obtained. In the resonant frequency range, the isolation methods of the two are Rayleigh wave rainbow capture and Rayleigh wave to body wave conversion. Finally, the EI-Centro seismic wave was used to verify the time history of the filled barrier. The maximum acceleration attenuation is more than 80%, which provides new design ideas and methods for seismic metamaterials in damping and isolation.

Key words: seismic metamaterial, vibration control, band gap, local resonance, seismic isolation, phononic crystal, very low frequency