Research On Outside-frame Column Of A Transfinite Frame-tube Structure

As a special kind of structure form, tube structure has large lateral stiffness,reasonable force, flexible use of space and other characteristics, especially suitable for Super High-rise Building. Because frame core tube structure has the advantages of frame and shear wall at the same time, it is widely used in office buildings.Taking a transfinite frame- core tube structure as an example, this paper analyses and discusses the whole structure and frame columns from the following several aspects with PKPM.1.Elastic analysis on the whole structure under frequent earthquake was analyzed in satwe. The results show that the whole indexes meet standard requirements, the structure arrangement is reasonable, and also satisfy the fortification goal of “no damage under frequent earthquake”.2.Shearing-force allocation of outside frame column was analyzed on the basis of analyzing the whole structure. The results show that the core tube shear wall as the main system to resist lateral force and the outside frame column can make full use of the function of the second seismic-proof.3.Performance-based seismic design of the outside frame column was designed under the medium earthquake. The results can meet the expected targets.4.Also performance-based seismic design of the outside frame column was designed under the rare earthquake. The results can also meet the expected targets.5.A push-over analysis on the whole structure, the results show that the structure has goof deformation capacity and collapse resistant capacity and also satisfy the fortification goal of “no collapsing with strong earthquake”.6.Also, a push-over analysis on skip-floor column of the structure,the results showed that the plastic hinge appearance of skip-floor column was later than other columns.Comprehensive research above, the whole structure and the outside frame column have good carrying and deformation capacity, and providing reference for similar projects.