Structural Analysis Of Mega-Frame Structure Simulating Construction Process

The mega-frame structure is a new structure system emerged in recent twenty years with the development of the modern tall buildings and modern sky-scraps. Some projects have indicated that the mega-frame system is one of the most economic structural systems used in modern tall buildings and modern sky-scraps. This structural system not only has the roles of increasing the rigidity , decreasing the volume of materials ,fully developing the behaviors of the structure and simplifying the details ,but also brings out the new style of architecture design. So the mega-frame composite system has being adopted in every places of the world , which the height is above 500 meters being designed by some countries .At present there are some reference on static and dynamic analysis of mega-frame structure system, both here and abroad . but , the current using calculating software for general tall building being used in designing the mega-frame structure which don't consider the special characteristic during it's being constructed .So it's very beneficial to study the difference between "structural analysis of Mega-Frame structure under complete loading" and "structural analysis of Mega-Frame structure simulating the construction process" . For this purpose , the study on the mega-frame structure in this paper is focused on the following aspects:1. In this paper, a mechanics model and a computing model which simulating construction process are presented for mega-frame structure. 2. Computing method simulating construction process and original datum definition for the finite software SAP2000 are put forward while computing with it.3. Analyse the Moment and Axial Force obtained by two different computing method ("structural analysis of Mega-Frame structure simulating the construction process" and "structural analysis of Mega-Frame structure under complete loading") then put forward a conclusion . At the same time, analyse computing error of the results of "structural analysis of Mega-Frame structure simulating construction process" and revise them. According to the results, some beneficial conclusion for designing mega-frame structure and other tall building is obtained ; in order to ensure the safety of building during it's using phase or construction phase, the design engineers should pay enough attention to the "structural analysis of Mega-Frame structure simulating the construction process" and compare it's results to the results which obtained by "structural analysis of Mega-Frame structure under complete loading", because later couldn't consider every working condition .