【作者】 徐忠华；

【导师】 刘海卿；

【作者基本信息】 辽宁工程技术大学 ， 结构工程， 2007， 硕士

【摘要】 叠层橡胶支座基础隔震技术为网壳结构抵御地震灾害提供了一种行之有效方法,在工程实践中得到较为广泛的应用,但是叠层橡胶支座在使用中也逐渐暴露出大变形回复力差、阻尼耗能能力弱等缺点,同时它对竖向地震也基本起不到隔震作用。本文在对普通叠层橡胶支座缺点充分分析的基础上提出了一种新型三维隔震支座,这种支座由叠层橡胶支座、形状记忆合金丝(SMA)、碟形弹簧复合而成,叠层橡胶支座用于水平隔震,碟形弹簧和橡胶支座串联用于竖向隔震,形状记忆合金丝通过超弹性变形提供较好的回复力和阻尼耗能能力,从而提高了叠层橡胶支座的大变形回复力和耗能能力,使叠层橡胶支座的性能得到较大改善。本文通过SMA丝材料试验验证了合金丝具有较好的超弹性性能。通过对三维隔震支座和普通叠层橡胶支座下网壳结构隔震效果的对比分析,表明该三维隔震支座的水平隔震性能明显优于普通叠层橡胶支座,同时对竖向地震也起到了较好的隔震作用。更多还原

【Abstract】 The Base-isolation technology with ordinary laminated rubber bearing proved an effective method for lattice shell structures to resist the earthquake disaster, and is used widely in project practice. But with more and more projects built, the ordinary laminated rubber bearing also shows out many defects, such as the lack of restitute capacity after large deformation、the inadequate of its own dissipation. It can’t. resist the vertical seismic response either.This thesis presents a new type of 3-D isolated bearing after the analysis of ordinary laminated rubber bearing, this bearing is composite with ordinary laminated rubber bearing、shape memory alloy(SMA) and disk spring. Ordinary laminated rubber bearing is used for the horizontal seismic isolation, the disk spring series with the bearing is used for vertical seismic isolation, the SMA can provide elastic restitute capacity and dissipation for the bearing, though this way ,the performance of ordinary laminated rubber bearing be improved greatly. In order to demonstrate the feasibility of the 3-D isolated bearing, the SMA material experiment is finished. The result shows that the 3-D isolated bearing has better performance than the ordinary laminated rubber bearing. Though the isolate effect comparative analysis of lattice shell structures with 3-D isolated bearing and ordinary laminated rubber bearing respectively, the result shows the horizontal seismic isolate effect of the 3-D isolated bearing is better than the ordinary laminated rubber bearing, it also can resist vertical seismic greatly.更多还原