Study On Dynamic Characterisric Features Of Large Span Cable-Beam With Muti-Floors Suspended Damper Control Structural System

In this paper, based on concepts of the structure control theory and the characteristic features of single layer suspend cable system, composite suspend megastructure system, mega-frame structure system. A new structural system composed of large span cable-beam suspended damper control structure has been presented. At first, the working character of this structural system is analyzed in terms of concepts, some key problems worthy of being studied of this structural system have been put forward to. The vibration behavior , aseismic behavior and control parameters of the large span cable-beam with muti-floors suspended damper control structural system have been especially studied in this thesis.In the aspect of the analysis about dynamic response and the study on structural control, the aseismic principle of the suspended structural system and its structure control methods have been analysed, a control model of the system is established, the structural system is dynamicly analysed using modal analysis method and dynamic time-history method. And the prestressed mega-frame-tube suspended damper control structural system has perfected a seismic performance compared with supported-frame cable-beam suspended structure system. The main factors that the control effect of the large span cable-beam with muti-floors suspended damper control structural system include the mass of the suspended structure, the stiffness and the connection of suspenders,the stiffness(Kd) and the damping(Cd) of spring damper control, prestressing force and sag of cable .The installation of spring damper in suspended floors can effectively control both the horizontal displacement of suspended floors at serviceability limit state and their too large horizontal displacement under earthquake, and it can greatly reduce the horizontal seismic force of mega-frame columns as well. The paper raise the parameter design concepts of tow-sides suspended control structural system, in order to satisfy human comfort requirements. And analyses show that the optimal design parameteres of control structure can greatly exhibit the a seismic behavior of suspended floors, which offers a new practical path for the large span cable-beam with muti-floors suspended damper control structural system to satisfy human comfort requirements. At last the paper refer to other main problems that will be studied in the future and the analysis methods.