| Masonry structure and frame structure are widely used in building structures in China,but these two structures are more prone to damage under earthquake action.Compared with the above two common structural forms,shear wall and core tube structure are the mainstream structural forms widely used in the world of super highrise buildings,which have the advantages of good overall performance and large stiffness;Under the action of horizontal load,the horizontal displacement of the top and the relative displacement between floors are small,which is beneficial to prevent the adverse influence of excessive displacement on the strength and stability of the main structure.At present,there are many researches on the seismic performance of shear wall and core tube structure at home and abroad,but there are few researches on the seismic performance of shear wall and core tube structure from the perspective of reliability,so it is necessary to carry out more in-depth researches on this basis.Based on the reliability calculation method,this paper uses two finite element software Open SEES and ABAQUS to conduct the elastic-plastic calculation and reliability analysis on the core tube structure with dark support respectively.The main contents are as follows:(1)The principle and application method of the finite element software Open SEES and ABAQUS are introduced.The finite element modeling of the two types of core tube structures is carried out respectively,and the elastoplastic calculation is completed.The calculation results are compared with the experimental results to demonstrate the feasibility of the finite element modeling.(2)Using the finite element software Open SEES,combining the Monte Carl simulation method with the Pushover method,the static elastoplastic analysis of typical core tube components is carried out.The influences of axial compression ratio,height-width ratio,span ratio of connecting beam and steel content ratio of dark bracing on seismic reliability of reinforced concrete core tube with mixed dark bracing are analyzed.(3)Python was called by MATLAB software to realize data interaction with finite element software ABAQUS.Dynamic time history analysis and static elasticplastic analysis were carried out on ordinary reinforced concrete core tube and reinforced concrete core tube with mixed dark support,and the elastic-plastic performance and reliability calculation results of the two were compared.The influences of the ratio of span to height of beam,the steel content of Angle column and the arrangement of different wall legs on the elastic-plastic performance and reliability of reinforced concrete core tube with mixed dark bracing are systematically analyzed. |
