ELASTO-PLASTIC ANALYSIS FOR SUPER TALL RC FRAME-CORE TUBE STRUCTURES BASED ON OPENSEES

Elasto-plastic analysis has been widely applied in the design of tall buildings. However, most analyses are conducted by using commercial software, which limits the further in-depth research on relevant topics. In this work, a new shear wall model and a concrete constitutive model are developed based on the open source finite element code, OpenSees, by which the elasto-plastic seismic analyses of super tall RC frame-core tube structures can be performed. A series of shear walls and a 141.8m frame-core tube building are simulated. By comparison with the experimental results and the analytical results by using MSC.Marc, the rationality and reliability of the proposed element and analysis method are validated, which will provide an effective tool for further research of the seismic behavior of tall buildings based on OpenSees.