Review and new development of seismic isolation technology for spatial structures

In order to promote the development of seismic isolation technology in spatial structures,several types of currently used bearings for vibration reduction are reviewed in this paper.To overcome the disadvantages of the in-use bearing,a new kind of three-dimensional seismic isolation bearing is then introduced.The new bearing is combined with friction sliding system in horizontal direction and helical springs or disc springs in the vertical direction.Based on the conception model,two practical bearings are designed and fabricated.Experimental testing on their dynamic characteristics is carried out on shaking table.Meanwhile,theoretical model of the bearing is established.Finally,some details related to dynamic analysis of seismic isolation for spatial structures are discussed.It is shown that the proposed bearing shares excellent properties.