Fluctuating Wind Load Of Reinforced Concrete Giant - Sub Controlled Structure

The super tall building will get more and more extensive application with our national economy and society fast development and the increment of the population density of city, therefore, it is necessary to taking careful research on the reasonable structural form of super tall building and the method which could exactly calculate the dynamic respond of this system.Megaframe structure is a kind of super tall building structure configuration that appears with the development of the structural engineering and the control theory. Through the control theory and the independence between megastructue and substructure, a new mega-sub controlled structure form of configuration has been brought forward.Fist, this paper makes the difference between the RC mega-sub controlled structure and the general RC megaframe structure on the form of configuration. The formula f the windward pulsoting wind load is deduced in term of the basic theory of wind load. To reflect the actual wind load, this paper uses colored noise models of the Daveport spectrum and simulates the pulsoting wind load with computer.This paper emphasizes the study of mega-sub controlled structure on the numerical analysis by the finite unit method. To reflect the actual character of the structure, this paper establishes models in term of the pole finite unit theory. Fist, mode analysis is accomplished, and stiffness influence of the structure by the member parameter and the accessional columns are analysed. Then the numerical value of the pulsoting wind load was used, the time history contrastable analysis between mega-sub controlled structure and general megaframe structure has been accomplished. Finaly, the influence of vibration-controlled efficiency under the different member parameter of vibration-absorption megaframe structure is analysed. This paper discusses the dynamical characters of the RC mega-sub controlled structure. It is concluded that the deformation and the acceleration of vibration-absorption megaframe structure can be well reduced under the windward pulsoting wind load, through choosing the reasonable the member parameter and the accessional columns stiffness of the structure. So the safety of the structure is enhanced, and the comfortable need is satisfied. So the new mega-sub controlled structure is a kind of ideal super tall building structure configuration, it will have the bright future.