The Torsion Response Control Method Of Complex High-rise Building With Large Local Space

With the rapid development of social and economic, people ask for more requirements on the function and appearance of the building. It caused the height increment of the structure, the structure plane layout to be day by day complex, sometimes also needs to set large local spaces or openings on specific floors or various adjacent floors , has formed the complex tall structure with large local space. The current study shows that the dynamic characteristic of such structure system is very complex with remarkable torsion vibration, and the structure members have significantly torsion damage under earthquake load.The Magnetorheological damper (MRD) is a new kind of devices for semi-active control. It only needs less power to keep the control systems running and provides a good kind of control device for structural vibration control. To control effectively, the semi-active intelligent control technology of structural vibration has been studied by using the MRD in this thesis.Taking acceleration and interstory displacement responses as inputs, and treating controlled current as output, fuzzy control technique is adopted to MR dampers. The Bingham model of MRD is selected in the research. A control model of three-lay frame vibration control system with a MRD is established. Meanwhile the model which in Sap2000 corresponds is established, compared with two kind of computation's final computed results, the Simulink simulation system's in structure semi-active fuzzy vibration control is feasible by the results.Besides, a six-floor frame model with local large space is established. Through the comparison of torsion vibration effect between forward control and afterward control, we can find that MRD can effectively reduce structure's torsion earthquake response under semi-active control.