The Analysis Of The Wind Response,Optimum Design And Wind Action Calculation Based On Davenport Spectrum Of Passice Controled Structures

With the advance of science and the development of society,more and more tall buildings appeared,and are developing toward the direction of high strength and light mass.The stiffness and damping of structures are declining. The effect of the wind,as the main load to the tall buildings,to the structures is aggravating.Through the way of control of wind-induced vibration,the wind-induced response of structures is reduced effectively,the reliability is improved and comfort requirement is satisfied.Wind-induced damage is reduced.At present,many sorts of passive control devices are gradually applying in the engeering projects.Because of the damping matrixes of all of these structures'motion equations are non-classical,even the mass and stiffness matrixes of them are non-symmetry,so the dynamic equation can't be decoupled by the traditional real-mcode analysis(the mode-superposition method).Though, in this thesis the complex-mode analysis is used to solve the stationary random wind response,optimum design and wind action calculation of structures.The thesis includes the following content: 1,With regard to the first mode or mutli-modes of the tall buildings or high-rise structures with five sorts of passive dampers or base-isolated device or viscoelastic damper or suspanded pendulum,using the complex-mode analysis, the wind responses of the above structures are got base on Davenport spectrum.2,On the basis of the above analytic expressions,taking the isolation or seismic decrease coefficient(the ratio of the standard deviation of the response of structures)as the optimal objective function,under the constraint of dynamic reliability of the isolated equipment based on the type of Poisson,the optimal design parameters of isolated equipment are got.3,With regard to mega subconfiguration structure considered as a new kind of passive controlled device,the oscillation equations of all the struture are established,and the equations of the main structure are expanded according to its multi modes and the equations of the subconfiguration are expanded according to its first mode;using the complex-mode analysis and random wind response theories,the wind responses of the structures are got base on Davenport spectrum.4,With regard to oupled tall building such as long-span transmission tower the oscillation equations of it are established,using the complex-mode analysis and random wind response theories,the wind responses of the structures are got base on Davenport spectrum.