Citation

Liu W, Liu W, Zhai S. China Saf. Sci. J. 2019; 29(8): 164-171.

Copyright

(Copyright © 2019, China Occupational Safety and Health Association, Publisher Gai Xue bao)

DOI

10.16265/j.cnki.issn1003-3033.2019.08.026

PMID

unavailable

Abstract

In order to improve metro operation safety, Copula dependency modeling theory is used to study influences of adjacent environmental changes under time-varying effects on metro structural safety. Firstly, structural reliability indicators were adopted to describe its safety during operation. Then based on Copula theory, the correlation between parameters of monitoring indexes during metro operation was described and binary discrete time-varying dependence model of convergence deformation (CD) and differential settlement (DS) was constructed. Finally, the model's accurancy was verified with a section of Wuhan Metro Line 2 as a project backgrround. The results show that Weibull distribution and Frank Copula are the optimal edge distribution function and Copula function respectively while Gaussian Copula is not optimal since traditional Gaussian Copula is not accurate in describing parameters ' correlation. Copula model in this study can sensitively capture structure safety changes under time effect by analyzing CD and DS values, thus helping formulate corresponding special operation risk control scheme based on analysis results. © 2019 China Safety Science Journal

Language: zh