Mega - Sub Control Structure System Response In The Vertical Seismic Action

Mega-sub controlled structural system is a new kind of super tall building structure configuration, it appears with the development of the structural engineering and the control theory, through synthesizing the special form of Mega frame structures which is made up of two classes frames and the basic thought of the control theory. It has the function of self vibration control.This paper takes work on the theoretic deduction, numerical analysis, and parameter optimization to study the Mega-sub controlled structural system. Based on the conclusion, a reformative structural form is introduced, and it is named Reformative Mega-sub controlled structural system in this paper.The member analytical model is adopted in the paper. Then this paper establishes the dynamic equation of the Mega-sub controlled structural system under the vertical non-stationary seismic action, and condenses the dynamic equation with static force cohesion method. Based on the complex mode theory, this paper gains the expression of dynamic response of the system under the vertical non-stationary seismic action. Choosing the municipal No. 1 building of Tokyo City as a calculating example, this paper analyses the dynamic characteristics of the system under vertical seismic action. The results of time history analysis show that Reformative Mega-sub controlled structural system have the better control effectiveness in comparison with the customary Mega-sub controlled structural system. Then this paper chiefly analyses the effects of the additional columns numbers, mega-beam stiffness and sub-frame floor numbers on the responses of Reformative Mega-sub controlled structural system under the vertical non-stationary seismic action, and the results show that the effects of these parameters on the responses of Reformative Mega-sub controlled structural system are very remarkable. At last, this paper discusses the design for the mega beam floor.The conclusion of this paper develops the research on the Mega-sub controlled structural system, and has some reference value to the actual engineering.