Finite element analysis of vibration transmission in building-integrated metro systems

This study develops a comprehensive model that integrates the vibration source, building structure, and surrounding soil layers. The methodology involves a vertical vehicle-track coupling dynamic model and a multi-scale coupled finite element model encompassing moving loads, track structure, building body, and surrounding strata. The results show that vibrations induced by trains operating on the first level remain within acceptable limits. However, when trains operate simultaneously on both the first and second levels, vibration levels in the overlying structure exceed specified standards. Further targeted design optimizations are recommended.