Offline iterative real-time hybrid test method and system for seismic isolation structure

An offline iterative real-time hybrid test system for a seismic isolation structure, comprising:

• a first calculation module:
• configured to load a driving displacement time history signal extracted from the seismic isolation structure onto an experiment substructure of the seismic isolation structure, and record the restoring force time history feedback signal of the experiment substructure;
• a second calculation module:
• configured to apply the restoring force time history feedback signal to a numerical substructure of the seismic isolation structure, solve a dynamic response of the numerical substructure, and record a structural displacement response time history signal of the numerical substructure;
• a judgment module:
• configured to calculate a root-mean-square error value of the driving displacement time history signal and the structural displacement response time history signal;
• judge whether the root-mean-square error value is less than a preset threshold value;
• if the root-mean-square error value is less than the preset threshold value, then end the experiment method;
• if the root-mean-square error value is not less than the preset threshold value, then correct the above time history signals according to a correction module;
• a correction module:
• configured to iteratively correct the driving displacement time history signal and the structural displacement response time history signal according to a model identification algorithm, and obtain a corrected driving displacement time history signal of the next iteration, and load the corrected driving displacement time history signal into the experiment substructure of the first calculation module.