Field experimental investigation on broadband vibration mitigation using metamaterial-based barrier-foundation system

Both periodic barriers and foundations can be used as passive isolation measures to reduce the unfavorable vibrations affecting protected superstructure. Under a certain direction of excitation, frequency band gaps provided by are usually distinguishable due different orientations these subsurface structures. In this study, series field tests conducted assess combined usage barrier foundation in manner achieve better wave effect. study made one-dimensional (1-D) layered material. Using state-of-art hydraulic mobile shaker (T-Rex), excitation with various types input signals applied all three orthogonal directions at desired location. The arrangement motion sensors allows for recording response ground surface superstructure directions. screening effectiveness, quantified Frequency Response Function (FRF), discussed separately, followed an overall evaluation performance system composed both foundation. results show that filtering capability is complementary each other, beneficial mitigating vibration