Analysis And Application Of Frame Structures With Basement Isolation

Seismic isolated structure system is a passive active Control system, which is different from traditional anti-seismic structure system. Through setting isolation layer, earthquake energy is absorbed and dissipated and earthquake response of structure is reduced, so that the safe of structure is ensured. Isolated structure system changes the energy dissipation mechanism of traditional anti-seismic structure, i.e. the earthquake energy is absorbed and dissipated by energy dissipative device set in a isolation layer rather than by the structure and structure elements. This excellent energy dissipation characteristic can not be realized by traditional anti-seismic structure.In this paper, the seismic reduction effectiveness and Earthquake response of frame structure building adopting Base seismic isolation is studied. A finite element sap2000 program used to dynamic time history analysis was developed to analyze the character of the nonlinear structure. Beam-column elements modal and bilinear spring is used to describe the mechanic character frame structure. And a five stories frame structure with basement isolation, a same structure with basement isolation I and a same structure with basement isolation II are analyzed as a example in this paper. The El-cantor earthquake wave was inputted on the structure. Some useful results are obtained through lots of comparative analysis.The research results illustrate that frame structure with basement isolation can reduce the horizontal earthquake response of structure effectively compared with traditional technique. This method is very effective, base shear, floor deformation, acceleration of isolation structure is less than no isolation structure. At the sometime, because of structure seismic functionary decrease, seismic measure is less than no isolation structure distinctly. Accordingly obtain lower building price and improved house useful function.