某裙房结构大跨度空间改造与减震设计

以某酒店裙房框架结构大跨度空间改造为研究对象,为保证大跨度空间改造后满足结构抗震要求,采用黏滞阻尼器和防屈曲支撑的混合减震控制方案对该裙房框架结构进行减震控制研究,分析了减震框架结构的动力响应和阻尼装置的耗能性能。研究结果表明:混合减震控制方法能有效提高裙房大跨度空间结构的抗震性能,多遇和罕遇地震作用下的减震效果分别达到27.51%和46.52%;黏滞阻尼器在多遇和罕遇地震作用下均发挥了良好的耗能性能;防屈曲支撑在多遇地震作用下作为钢支撑为结构提供刚度,但在罕遇地震作用下亦发挥了良好的耗能性能,表明所提减震控制方案可对结构同时附加刚度和阻尼。本文研究成果可为类似结构大跨度空间改造提供参考。

Large-span Space Reformation and Seismic Control Design of a Skirt Structure

Large-span space reformation of skirt frame structure of a hotel was studied in this paper. Mixed seismic control scheme of using viscous damper and buckling-restrained brace was adopted to improve the seismic performance of the skirt structure with large-span space reformation. The dynamic responses and energy dissipation performances of the damping devices were investigated in detail. Results show that the mixed seismic control scheme is very effective of improving the seismic performance of the skirt structure and corresponding seismic control effect in small ＆ strong earthquakes arrives to 27.51% and 46.52%, respectively. Excellent energy dissipation performance of viscous dampers can be found in both small ＆ strong earthquakes. Buckling-retrained brace shows steel brace in small earthquake, but shows excellent energy dissipation performance in strong earthquake. Research in this study provides new ways of reforming large-span space structure and can be adopted in similar engineering structures.