Mechanical behavior and isolation effect of new double-layer inclined vibration bearing: Experimental study and dynamic test

The subway-induced vibration raises comfort issues to buildings neighbor to subway lines. Vibration isolation measures are commonly employed to mitigate subway-induced vibrations. This study introduces a novel double-layer inclined vibration bearing (DLIVB), composed of inclined natural rubber bearings. Firstly, the mechanical model of DLIVB was established, and a parametric analysis was performed. The isolation frequency is mostly affected by the inclination angle and decreases with the angle increasing. Subsequently, static tests were carried out to validate the proposed mechanical model. The test results fall within the range of the theoretical predictions, with an error of 10 %. Finally, on-site vibration tests were conducted to evaluate the effectiveness in mitigating subway-induced vibrations of the bearing. The isolation frequency and the acceleration reduction rate observed from the test were consistent with design. Additionally, the results show that DLIVB has potential to realize low isolation frequency and high bearing capacity simultaneously.