高烈度地区某超高层项目斜墙转换应用研究

Research on application of transfer inclined wall of a super high-rise project in high-intensity area

西安某超高层办公楼,根据结构抗侧刚度需要,在核心筒与外框柱之间增设剪力墙形成框架剪力墙结构体系。本文首先对外框柱与核心筒之间增设的剪力墙的转换方案进行了结构选型分析,然后采用MIDAS/Gen对转换斜墙进行了有限元分析,最后采用SAUSAGE对整体结构进行了大震动力弹塑性时程分析,论证了斜墙转换方案的合理性。分析结果表明:与普通转换梁方案相比,一方面斜墙转换具有减小结构刚度突变、减小剪力突变的优势,另一方面斜墙转换可有效地避免转换构件在大震作用下由于刚度突变而使转换斜墙出现应力集中与剪切损伤破坏,具有良好的抗震性能。

A super high-rise office building in Xi'an,the frame shear wall structure system is formed by adding shear walls between the core tube and the outer frame columns according to the lateral stiffness.In this paper,the transformation scheme of shear wall between external frame column and core cylinder is analyzed,then MIDAS/Gen was used for the finite element analysis of the conversion inclined wall,and finally SAUSAGE was used for the large earthquake dynamic elastic-plastic time history analysis of the overall structure are carried out so as to demonstrate the rationality of the structural scheme.The results show that compared with the transfer beam,on the one hand,the inclined wall conversion has the advantages of reducing the sudden change of structural stiffness and shear force,on the other hand,the inclined wall conversion can effectively avoid the stress concentration and shear damage caused by the sudden change of stiffness of the transfer member under the action of large earthquakes,It shows that inclined wall conversion has good seismic performance.