| Mega-frame is composed of mega-frame which is the main structure and floor-frame which is the minor. Mega-frame has characteristics of great rigidity, superior property as a whole, clear-cut transmitting mechanism, flexible using space, economical building materials, low prices and high speed of construction and so on. Because of its efficiency, flexibility and economization, mega-frame has become one of the most promising structure systems for tall buildings. This paper introduces the development of mega-frame structure and analyzes its advantages and the reason why there is so few tall buildings using mega-frame structure. Then, the author puts forward his personal opinion on the prospect of mega-frame structure system. In order to solve the static, dynamic and material nonlinear problems of mega-frame structure, this paper analyzes mega-frame structure by QR-method and sets up a new computational form. In this paper, the author adopts the method of repeated increment and no limit stabilization to handle the elastic-plastic rigid equation and dynamic equation. By comparing withfinite element method, the results show that QR-method boasts fewer unknown number, high precision, simple computation and strong adaptability, so it is an economical and effective computational method. This paper is valuable not only in theory but also in practice.
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