Simulation and Simplified Method Study on Seismic Collapse of Core-outrigger Structures

The seismic collapse resistance of super high-rise structures is very important. Based on the shaking table test of a core-outrigger structure, a multi-scale finite element model is established for collapse simulation analysis; IDA static equivalent method is proposed to evaluate the collapse resistance of the model on the assumptions about lateral force distribution, capacity spectrum curve and collapse performance point; blind source separation method is used for data-driven damage detection to reveal the earthquake collapse mechanism and evolution process of super high-rise structures. The results show that the response time history of the multi-scale model is in good agreement with the experiment, and can simulate the lateral collapse of the structure caused by the local buckling of the column; IDA static equivalent method is efficient and accurate for evaluating the seismic collapse resistance of the core-outrigger structure; blind source separation method can extract the information of time and location of structural damage only from structural response data.