The Research On Seismic Responses Of Elevator Style Garage

While the automobile capacity of cities increases rapidly, people find it difficult to park their cars,building mechanical parking system can resolve this problem,in the condition that inch of land in cities is very expensive,We can foresee that elevator style garage will be mainstream garages.In this thesis the seismic response of the single elevator style garage and combined garage is researched when the structure is in common and severe earthquake, then the vibration of seismic response is researched by changing the Structural control parameters.The main content of the thesis are listed as followed:At first, the dynamic equation of elevator style garage is researched,including the select of the mass matrix,damping matrix and stiffness matrix.The Wilsonθ-method time-history analysis method is introduced to analyze the seismic response. The vibration-reduced device is selected based on the theory of energy dissipation.The characteristics of natural frequency of vibration of the single elevator style garage are researched by using software ANSYS.in order to illuminate the dynamic character of structure.,including the vibration frequency of the frame Structures and the braced frame structure,two kinds of situation the structure certain low-order inspires the characteristic and so on;The influences of the structural seismic response in different earthquake waves are analyzed.,as well as the different direction earthquake wave response difference,and was often meeting under the earthquake function to the structure and meets under the earthquake function the earthquake to respond rarely has conducted the research, has discovered the elevator type three-dimensional garage under withstanding earthquake load function structure weak link;Responded the change tendency to the portal frame construction and in the frame support structure two kind of situations along with the structure high width compared to the change earthquake to make the detailed analysis,obtained the portal frame construction system garage and the frame support structure system garage biggest high wide ratio;Meanwhile responded to the structure earthquake under each kind of bracing arrangement form the change tendency has made the exhaustive analysis, finally find the best arrangement to instruct the design;Inelastic time history analysis of the eccentrically braced frame structure under seldom earthquake is carried out, The effect of eccentrically braced frame on its earthquake-resistant performance was displayed,when the length of energy consumption part of eccentrically braced frames is between 0.6MP/Vp and 1.2Mp/Vp,it is helpful to resist the earthquake.Give two basic forms of the combined garage:X direction combination garage and Y direction combination garage, its natural vibration parameters and the characteristics of lower step vibration shapes were displayed,find the control direction under the earthquake response, relate the features of the combined garage, and analyses the developing trends of seismic response of garages under different bracing arrangements.at last find the best arrangement for earthquake resistance of combined garage.