Numerical analysis of vibration standard conditions of adjacent buildings caused by subway train

초록

In recent years, urban subway systems have become the predominant mode of transportation. Yet, a comprehensive examination of vibrations in adjacent buildings caused by subway operations and their compliance with vibration standards remains lacking. This study employs FLAC 3D software to create a tunnel-soil-building model. Rayleigh damping stiffness proportional coefficients for three distinct ground types are estimated from Free-Free Resonant Column (FFRC) tests, revealing that stiffer ground corresponds to higher vibration levels. The research investigates the influence of ground types, train velocities, and the application of rubber mats in mitigating subway-induced vibrations in nearby building structures. The findings indicate that increased tunnel depth generally results in reduced vibration levels. Vibration levels do not strictly diminish with greater distances from tunnels and buildings. The study covered five different train speeds and showed that as train speed increases, the level of vibration felt by the human body decreases. This research offers valuable insights for designing buildings adjacent to operating subway systems, with a primary focus on soil types and train speeds.

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