Application of multi-hazard knowledge base for underground infrastructure based on iS3 platform

Abstract

The underground infrastructure is faced with progressive diseases such as deformation, leakage, crack and sudden disasters such as fire, explosion and earthquake during its service period, and the interaction of multiple disasters leads to multi-field coupling and disaster chain. The multiple disasters knowledge base of underground infrastructure is based on iS3 platform, including static case database, static knowledge base, model method base and scenario base. The multi-disaster knowledge base combs the real disaster cases in the last hundred years according to the unified disaster data standard, which can realize the inquiry and statistical analysis of multi-disaster cases. By summarizing the key parameters of multiple disasters, the quantitative models between the characteristics of underground infrastructure operation safety state and the measurable state parameters are established. Some of the input parameters for the multiple disasters models are from the static database, and these models are automatically updated according to the characteristics of the underground infrastructure service life. The independent concurrent and interlocking multi-disaster chain scenarios and patterns are established by numerical simulations, real-scale tests and model-scale experiments. A case study of the Shanghai Century Avenue subway station is performed. A variety of disaster numerical simulations are carried out based on the unified BIM model, and knowledge base is used to carry out inversion, prediction and analysis of key parameters.