高烈度区某特别不规则高层框架剪力墙结构基础隔震设计

The Foundation Isolation Design of a Special Irregular High-rise Frame Shear Wall Structure in High Intensity Area

以高烈度区某特别不规则的高层框剪基础隔震结构为研究对象,阐述了采用钢板叠层橡胶隔震支座(LNR、LRB)进行隔震的结构设计方法。针对不规则项及结构薄弱部位提出了加强措施。在设防烈度为8度(0.2 g)的地震作用下,对该建筑的隔震及非隔震结构进行了动力时程分析。在罕遇地震下,对隔震结构的层间位移角、隔震支座的水平剪切位移、隔震支座的轴向拉应力、隔震层的抗风承载力进行了时程分析验算。研究结果表明:运用基础隔震技术可达到明显降低上部结构的地震作用的效果,提高特别不规则高层框架剪力墙结构的抗震性能及地震安全储备。

In this paper,the structure design method of steel plate laminated rubber isolation bearing(LNR,LRB)is described based on a special irregular high rise frame-shear foundation isolation structure in high intensity area.The strengthening measures for irregular items and weak parts of structure are put forward.Under the seismic intensity of 8 degrees(0.2 g),the dynamic time-history analysis of the isolated and non-isolated structures is carried out.In the case of rare earthquakes,the time-history analysis and calculation of the interlayer displacement angle,the horizontal shear displacement,the axial tensile stress and the wind bearing capacity of the isolated layer are carried out.The results show that the application of base isolation technology can significantly reduce the seismic effect of the superstructure and improve the seismic performance and seismic safety reserve of the especially irregular high-rise frame shear wall structure.