Research on seismic isolation retrofit of historical buildings

The technology of seismic isolation which is used to strengthen the historical buildings not only heightens its seismic ability,but also preserves its original architectural features.The research on the technology of seismic isolation are proposed in this paper,such as the principles of setting seismic isolation bearing and the way to calculate the seismic isolation structures.The construction technology of seismic isolation retrofit technique is also discussed.Meanwhile,a combined seismic isolation device with sliding and lead rubber bearing is also proposed.In this paper,isolation effect is introduced through calculating the seismic response in which lead-rubber bearing and combined seismic isolation support are respectively used.As the seismic shear is concerned,the former method takes 30%～35% of non-seismic isolation structure,and the latter one takes 25%～30%.Both of them exert obvious effect of seismic isolation.