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高风压、高烈度地区的高层建筑隔震设计时存在隔震层抗风需求与减震效果难以协调的问题,且罕遇地震作用下隔震层位移过大需进行限制,为此,提出在隔震层中增设变性能黏滞阻尼器形成组合隔震体系,利用变性能黏滞阻尼器的分段式性能分别控制风、地震作用下结构响应。介绍了变性能黏滞阻尼器隔震体系的构造、作用机理、设计流程,并以某29层框剪结构为例进行了隔震设计分析。结果表明,变性能黏滞阻尼器隔震体系具有良好的耗能能力和隔震层限位效果,能够同时兼顾高层隔震结构抗风与减震需求,在高风压、高烈度地区的高层隔震建筑中有较好的工程应用价值。
In the design of high-rise buildings in high-wind pressure and high intensity regions, there is a problem that the wind-resistant demand of the seismic isolation layer is hard to be coordinated with the shock-absorbing effect and the displacement of the seismic isolation layer under the rare earthquakes is too large to be limited. Therefore, In the isolation layer, a variable viscous damper is added to form a combined seismic isolation system. The structural response of the viscous damper is controlled by the segmented performance of the viscous damper. The structure, mechanism and design flow of seismic isolation system with variable viscous damper are introduced. The seismic isolation design and analysis of a 29 - story frame shear structure is taken as an example. The results show that the system with variable energy viscous damper has good energy dissipation capacity and isolation effect. It can take into account the wind-resistant and vibration-damping requirements of high-rise seismic isolation structures at the same time. In the areas with high wind pressure and high intensity, Isolated buildings have better engineering application value.