上海中心大厦幕墙支撑结构与主体结构协同工作分析与控制
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摘要
将幕墙支撑结构与主体结构建立整体有限元分析模型,对幕墙支撑结构与主体结构的协同工作特性进行了详细分析,主要包括设备层吊点不均匀竖向变形特性及其对幕墙玻璃板块安全和支撑结构受力的影响分析,水平荷载作用下幕墙支撑结构与主体结构相对竖向变形特性及其对支撑结构受力的影响分析,竖向地震作用下支撑结构竖向不均匀变形、内力及加速度反应及其对主体结构幕墙的影响分析,由此提出相应的设计调整措施。分析结果表明,重力荷载作用下,幕墙支撑结构的不均匀变形超过幕墙玻璃板块变形的容许范围,可导致幕墙玻璃板块破坏,通过调整设备层楼面结构布置和休闲层楼板刚度,可减小吊点变形差异,保证幕墙玻璃板块的安全;重力荷载、水平荷载作用下,支撑结构环梁与主体结构的竖向相对变形将引起径向支撑的附加弯矩,通过设置滑动构造可减小弯矩保证支撑结构受力安全;竖向地震作用下,幕墙支撑结构将产生较大的不均匀变形对幕墙玻璃板块受力带来不利影响,吊杆产生较大附加轴力,环梁竖向加速度反应显著,设计时应对以上不利因素进行评估以保证幕墙支撑结构的安全。
By means of integrated finite element analysis model including suspended curtain wall support structure(CWSS) and main structure,the properties of cooperative work of CWSS were analyzed in detail,including the analysis of properties of nonuniform deformation of suspension point and its effect on internal forces and safety of curtain wall plates,the analysis of properties of relative vertical deformation and its effect on internal forces of CWSS under horizontal loads,the response of vertical nonuniform deformation,internal forces and acceleration of CWSS under vertical earthquake action and adjustment measures about them.Analysis results show that,under gravity load,nonuniform deformation of CWSS will be out of allowable range of glass plates and lead to damage.By adjusting the structure arrangement of mechanical,electrical and plumbing floor and stiffness of amenity floor,the nonuniform deformation could be reduced and the safety of glass plates could be assured,too.Under gravity and horizontal loads,vertical relative deformation between main structure and ring beam will lead to additional moments of radial strut.Setting the sliding structure in the end of radial strut can reduce the additional moment and ensure service of curtain wall safety.Under vertical earthquake action,a larger nonuniform deformation which has an adverse effect on plates,additional axial force of sag rods and significant vertical acceleration response of ring beam will be produced.In the design process,all above adverse factors should be evaluated to ensure the safety of curtain wall system under vertical earthquake action.
By means of integrated finite element analysis model including suspended curtain wall support structure(CWSS) and main structure,the properties of cooperative work of CWSS were analyzed in detail,including the analysis of properties of nonuniform deformation of suspension point and its effect on internal forces and safety of curtain wall plates,the analysis of properties of relative vertical deformation and its effect on internal forces of CWSS under horizontal loads,the response of vertical nonuniform deformation,internal forces and acceleration of CWSS under vertical earthquake action and adjustment measures about them.Analysis results show that,under gravity load,nonuniform deformation of CWSS will be out of allowable range of glass plates and lead to damage.By adjusting the structure arrangement of mechanical,electrical and plumbing floor and stiffness of amenity floor,the nonuniform deformation could be reduced and the safety of glass plates could be assured,too.Under gravity and horizontal loads,vertical relative deformation between main structure and ring beam will lead to additional moments of radial strut.Setting the sliding structure in the end of radial strut can reduce the additional moment and ensure service of curtain wall safety.Under vertical earthquake action,a larger nonuniform deformation which has an adverse effect on plates,additional axial force of sag rods and significant vertical acceleration response of ring beam will be produced.In the design process,all above adverse factors should be evaluated to ensure the safety of curtain wall system under vertical earthquake action.
引文
[1]丁洁民,何志军,李久鹏,等.上海中心大厦悬挂式幕墙支撑结构设计若干关键问题[J].建筑结构,2013,43(24):6-11.(DING Jiemin,HE Zhijun,LI Jiupeng,et al.Several key issues of analysis and design of suspend curtain wall support structure of Shanghai Tower[J].Building Structure,2013,43(24):6-11.(in Chinese))
[2]丁洁民,巢斯,赵昕,吴宏磊.上海中心大厦结构分析中若干关键问题[J].建筑结构学报,2010,31(6):122-131.(DING Jiemin,CHAO Si,ZHAO Xin,WU Honglei.Critical issues of structural analysis for the Shanghai Center Project[J].Journal of Building Structures,2010,31(6):122-131.(in Chinese))
[3]RWDI.Wind-induced structural response studies on Shanghai Tower[R].Guelph,Ontario:Rowan Williams Davies&Irwin Inc.2009.
[4]DGJ 08-9—2003建筑抗震设计规程[S].上海:上海市建设工程标准定额管理总站,2003.(DGJ 08-9—2003 Code for seismis design of buildings[S].Shanghai;Shanghai Construction Quota&Standard Management Station,2003.(in Chinese))
[5]何志军.丁洁民.李久鹏.上海中心大厦悬挂式幕墙支撑结构竖向地震反应分析[J].建筑结构学报,2014,35(1):34-40.(HE Zhijun,DING Jiemin,LI Jiupeng.Analysis on vertical seismic response of curtain wall support structure of the Shanghai Tower[J].Journal of Building Structures,2014,35(1):34-40.(in Chinese))
[2]丁洁民,巢斯,赵昕,吴宏磊.上海中心大厦结构分析中若干关键问题[J].建筑结构学报,2010,31(6):122-131.(DING Jiemin,CHAO Si,ZHAO Xin,WU Honglei.Critical issues of structural analysis for the Shanghai Center Project[J].Journal of Building Structures,2010,31(6):122-131.(in Chinese))
[3]RWDI.Wind-induced structural response studies on Shanghai Tower[R].Guelph,Ontario:Rowan Williams Davies&Irwin Inc.2009.
[4]DGJ 08-9—2003建筑抗震设计规程[S].上海:上海市建设工程标准定额管理总站,2003.(DGJ 08-9—2003 Code for seismis design of buildings[S].Shanghai;Shanghai Construction Quota&Standard Management Station,2003.(in Chinese))
[5]何志军.丁洁民.李久鹏.上海中心大厦悬挂式幕墙支撑结构竖向地震反应分析[J].建筑结构学报,2014,35(1):34-40.(HE Zhijun,DING Jiemin,LI Jiupeng.Analysis on vertical seismic response of curtain wall support structure of the Shanghai Tower[J].Journal of Building Structures,2014,35(1):34-40.(in Chinese))
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