中国华能集团人才创新创业基地办公楼悬挑结构设计
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摘要
长悬挑结构的竖向地震反应及防连续倒塌设计必须引起工程技术人员的重视。华能集团人才创新创业基地办公楼,由于建筑的独特造型,层4及层14设悬挑钢桁架,最大悬挑长度达到18m,标准层在层7,10,13分别设置一层球形办公室,采用桁架悬挂在最东侧钢管混凝土柱-钢支承筒外,最大悬挑长度达到12.4m。采用竖向地震波对悬挑结构进行了时程分析,通过对比悬挑结构的加速度,给出了竖向加速度放大系数。对悬挑结构的几榀关键桁架进行了防倒塌分析,以保证结构设计是安全的。
The problems of vertical seismic action and preventing structural progressive collapse must draw the attention of engineers in the design process of long cantilever structure.Due to the unique shape,the cantilever steel trusses are set up in the fourth and fourteenth layers of office building for China Hua Neng Group(CHNG) Talent Innovation and Entrepreneurship Campus.The maximum cantilever length can reach to 18m.The staggered spherical offices are set in the seventh,tenth and thirteenth standard layers.The spherical offices are hanging in the outside of the steel brace tube using the trusses.The maximum cantilever length of the spherical offices can reach to 12.4m.Time history analysis of the cantilever structure was done using the vertical seismic waves.By comparing the acceleration of the cantilever structure,the vertical acceleration amplification factor are obtained.In order to ensure the safety of the structure,the preventing structural progressive collapse analysis was used for critical trusses of the cantilever structure.
The problems of vertical seismic action and preventing structural progressive collapse must draw the attention of engineers in the design process of long cantilever structure.Due to the unique shape,the cantilever steel trusses are set up in the fourth and fourteenth layers of office building for China Hua Neng Group(CHNG) Talent Innovation and Entrepreneurship Campus.The maximum cantilever length can reach to 18m.The staggered spherical offices are set in the seventh,tenth and thirteenth standard layers.The spherical offices are hanging in the outside of the steel brace tube using the trusses.The maximum cantilever length of the spherical offices can reach to 12.4m.Time history analysis of the cantilever structure was done using the vertical seismic waves.By comparing the acceleration of the cantilever structure,the vertical acceleration amplification factor are obtained.In order to ensure the safety of the structure,the preventing structural progressive collapse analysis was used for critical trusses of the cantilever structure.
引文
[1]冯丽娟,肖从真,徐自国,等.北京当代MOMA悬挑结构竖向地震分析及设计要点[C]//第十九届全国高层建筑结构学术会议论文集,2006.
[2]冯丽娟,肖从真,徐自国,等.悬挑结构竖向地震作用分析及设计要点[J].土木工程学报,2008(3):65-70.
[3]GB50011—2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.
[4]JGJ3—2010高层建筑混凝土结构技术规程[S].北京:中国建筑工业出版社,2010.
[2]冯丽娟,肖从真,徐自国,等.悬挑结构竖向地震作用分析及设计要点[J].土木工程学报,2008(3):65-70.
[3]GB50011—2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.
[4]JGJ3—2010高层建筑混凝土结构技术规程[S].北京:中国建筑工业出版社,2010.
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