The Seismic Response Analysis Of Story Isolation Structure System Using Sma Compound Bearing

Isolation includes base isolation and story isolation, nowadays, base isolation is the main isolation which the international architectural isolation, with the research and application of deepening about base isolation, it gradually shows faults, story isolation is the new development about isolation technology. Working mechanism and application were analyzed in this paper, established a simplified layer spacing earthquake dynamic response of structural system equation. In ordinary deficiency of ordinary laminated rubber bearing lateral stiffness low level and large displacement restoring capacity, using super elasticity properties of SMA materials, installed in the ordinary twisted SMA diagonally laminated rubber bearing, designing a new kind of reducing vibration energy device-SMA compound bearing. And from the theoretical analysis of the SMA compound bearing changing the principle of structure isolation, established dynamic analysis model based on the SMA compound bearing structural story isolation earthquake system to determine the solution method. Through the establishment of earthquake-layer architecture of the three-dimensional solid finite element model, as well as a numerical comparation between laminated rubber bearing and SMA compound bearing structural story isolation, verified the damping effects of SMA compound bearing. The result shows that:(1) The SMA wire can improve ordinary rubber bearings stability and the restorative. in ordinary twisted SMA installation laminated rubber bearings, that can improve bearing lateral stiffness and can make excessive levels of shear deformation occurs bearings in situ recovery to maintain the stability and bearings.(2)Story isolation can effectively prolong natural vibration period of story isolation structure system, the main deformation of structure in isolation layer, the lower layer has the good effect of isolation, and the construction is convenient, story isolation is one kind suspension system which has the development prospect . (3)In the story isolation structure system, SMA compound bearing has the better vibration-isolation effectiveness compare with ordinary laminated rubber bearings.Itdemonstrated that SMA compound bearing is a kind of effective bearing, SMA compound bearing have good isolation effect that applied in isolation system.