ANALYSIS OF INTERNAL FORCE AND DEFORMATION FOR THE NEW CCTV HEADQUARTERS DURING THE CONSTRUCTION PROCESS

The new CCTV headquarters consists of two towers leaning 6 -off vertical in both directions, a tremendous 14 -story -high cantilever joining two leaning towers at the top and a 9 -story -high podium at the bottom. Different constructionprocedures will lead to different internal force and deformation distribution during the construction process in this complexsteel structure. They will be locked within the structure and have to be considered in the structural design. It is evident thatthere is a great difference in internal force and deformation distribution between according to design model one time loadingand according to step -by -step construction process. And it is necessary to take reasonable construction procedures andmeasuresto guarantee the internal force and deformation of the construction -completed structure to meet the requirementgiven by designers. It is presented the internal force and deformation analysis of the CCTV new headquarters during theconstruction process by employing nonlinear finite element method, and the internal force anddeformationdistribution lockedin the structure is determined. Lots of numerical results have beenobtained asguidelinesfor the erection and construction ofthe project.