Author(s)

Wei Huihui, Liu Hongliang, Xiao Yangzhe, Zou Kangjing

Corresponding Author

Liu Hongliang

ABSTRACT

The frequent complaints from owners regarding the comfort of the cover buildings above urban rail transit vehicle depots appear to be caused by differences in construction conditions across various projects, unreasonable analytical and calculation methods, and discrepancies in testing that lead to distorted results. This results in significant fluctuations in the predicted or evaluated comfort levels of the cover buildings’ wheel-rail vibrations. However, at its core, the issue arises from uncertainties in the performance of vibration isolation materials or products, uncertainties in the geometric dimensions involved in the vibration isolation process, uncertainties in the calculation models used to predict the comfort of the cover buildings' wheel-rail vibrations, and uncertainties in the experimental methods and techniques used to evaluate this comfort. Essentially, this is a reliability design issue for the wheel-rail vibration comfort of over-track buildings. The definition of the limit state for the wheel-rail vibration comfort of over-track buildings above rail transit vehicle depots is proposed. A limit state equation is established, consistent with conventional reliability theory for building structures. Based on a technical pathway analysis of the comfort of over-track buildings above rail transit vehicle depots, a unique and innovative approach is taken by shifting the focus of the comfort issue to vibration isolation technologies and measures outside of the over-track buildings themselves. This novel method instantly clarifies and simplifies the highly complex reliability problem of wheel-rail vibration comfort in the over-track buildings. Building on the above, a clear and specific technical pathway for the reliability design of wheel-rail vibration comfort in over-track buildings is proposed, laying a solid foundation for further research into the reliability of wheel-rail vibration comfort in over-track buildings.

KEYWORDS

rail traffic; over-track buildings; wheel-rail vibration; comfort; vibration reduction and isolation technology; reliability