厦航总部大厦超高层办公楼结构设计

Structural design of super high-rise office building of Xiamen AIR HQ in Fujian

厦航总部大厦办公楼建筑高度185m,结构存在扭转不规则、凹凸不规则、刚度突变、尺寸突变、承载力突变、其他不规则(穿层柱、斜柱),属于特别不规则结构,且高度超限,为超限高层建筑。结构采用钢框架(矩形钢管混凝土柱)+中心支撑结构体系,底部0~24m结构高度范围采用了承载型屈曲约束支撑。介绍了整体结构布置及特点、二道防线设计、承载型屈曲约束支撑设计、斜柱节点设计;针对项目的超限点与需加强部位确定合适的抗震性能目标,采用YJK、ETABS、SAP2000等软件进行小震、中震、大震下的计算分析和论证,并采取合理的措施进行加强。经分析论证,本结构能满足相关规范和确定的抗震性能目标要求。充分发挥了钢结构延性好的优势,有效提高了结构的抗震能力。

The building height of office building of Xiamen AIR HQ in Fujian is 185 m.It has irregular torsion,concave-convex irregularity,bearing capacity abrupt change,stiffness mutation,abrupt size changeand partial irregularity(including cross-story column and inclined column).It belongs to a special irregular structure and a high-rise building.The building adopts rectangular concrete filled steel tubular column+concentrically braced steel frame structural system,and buckling restrained braces are used in the bottom 0~24 m.The overall structure layout and characteristics,the design of two seismic defense lines,bearing type buckling restraint braces design,design and strengthening measures for inclined column were introduced.In view of the out-of-code situation and weak parts of the project,appropriate performance objectives were proposed,and the calculation analysis and demonstration under minor earthquake,middle earthquake and major earthquake were carried out by using software such asYJK,ETABS and SAP2000,and corresponding strengthening measures were taken.The analysis results show that the structure can meet the requirements of relevant specifications and performance objectives.It can give full play to the advantages of good ductility of steel structure,and effectively improve the seismic capacity of the structure.