大跨空间结构隔震技术的现状与新进展

为促进大跨空间结构隔震技术的发展,论文系统分析了目前常用的几类隔震支座,针对其中的一些问题,提出了一种新的三维复合隔震支座.该新型支座水平采用摩擦滑移隔震,竖向采用螺旋弹簧或碟形弹簧隔震.基于概念模型,设计制作了两类支座,对其动力特性进行了振动台试验研究,并依据试验结果建立了其理论模型.最后,对复合隔震支座在大跨空间结构中的隔震性能进行了模拟分析,结果表明该支座具有优良的隔震性能,能有效解决大跨空间结构的三维复合隔震问题.

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.