The Analysis Of The Structure Stability Of International Plaza Mansion

In this thesis,The finite element analysis software ANSYS is employed to give a comprehensive static and dynamic force analysis of Cheng Du International Plaza Mansion.The mechanical model is established according to the structure design documents and characteristics. Based on this,ANSYS analysis model is built for static and dynamic force analysis.Effectively solved the dimension matching problem during the model of tube in tube structure,Steel frame connection, shear wall and roof plate,realized the transformation from high-rise steel-concrete mixed connected structure of twin towers structure to ANSYS model. The architecture ANSYS model is complicated with more than 40,000 nodes and more than 50,000 elements.The structure model was complex.How the node connection between different materials problems is successfully solved in this model.Accomplishment the analysis of static force under the different load combinations wind load and permanent load.The dynamic analysis based on the static analysis,According to the spectrum analysis, the relationship horizontal displacement during earthquake is found:Horizontal displacement increases as the number of level increases.Torsions happen to the frame and the shear wall. According to the structure dynamical dynamic time-history analysis under the different seismic wave,the influence of earthquake on this structure is found:Along with the increasing of the earthquake magnitude, the story displacement increases and story drift significantly changes,and significant X-direction torsion of the structure.The weak parts of Cheng Du International Plaza Mansion are found based on the ANSYS analysis.Strengthen and rebuilding should be conducted to ensure the normal using safety of this building.The research result also provides a valuable reference to other high-rise steel-concrete mixed connection structure in Cheng Du area.Especially for now that the buildings in Cheng Du area have been largely affected by WenChuan 5.12 earthquake,it is necessary and timely to re-evaluate,strengthen or rebuilt the existing buildings.This research is very valuable in terms of safety and practice.