昆明某大跨连体天幕钢结构设计
摘要:昆明某连体天幕为高烈度区连接超高层塔楼及商业裙房的大跨度连体钢桁架,其中塔楼采用钢筋混凝土框架-剪力墙结构体系,商业裙房采用钢筋混凝土框架结构体系。对连体桁架与主体结构不同连接方式进行了对比,发现采用摩擦摆滑动支座进行连接可显著减小对塔楼相关构件内力的影响。对结构进行了弹性分析和非线性屈曲稳定分析,对关键节点采用性能化分析方法。同时,通过大震弹塑性分析,支座最大滑动量满足其性能要求,并针对结构薄弱环节进行加强。对关键节点进行了有限元分析,验证了节点的可靠性,计算结果均满足结构安全性要求。
关键词:大跨钢结构,连体天幕,摩擦摆,多尺度法,性能化分析方法
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参考文献[1] 建筑结构荷载规范:GB 50009—2012[S].北京:中国建筑工业出版社,2012.
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[5] 薛彦涛,韦承基,孙仁范,等.采用不能材料加层时结构阻尼比计算方法(应变能法)[J].工程抗震与加固改造,2008(2):91-95.
[6] 徐培福,肖从真,王翠坤,等.架空连廊的震害及设计建议[J].建筑结构,2004,34 (1):51-52.
[7] 李春锋,杜永峰,李慧.弱连体结构非平稳随机地震响应与动力可靠度分析[J].建筑结构,2016,46(16):68-75.
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[9] 梁伟,高银鹰,贾文颖.连体结构的设计与分析[J].建筑结构,2012,42(S1):321-327.
[10] International building code 2000:IBC 200[S].Virginia:International Code Council,2000.
[2] 冯永伟,吴小平,杨学林,等.基于风洞试验的双塔楼超高层建筑风荷载与风致响应[J].建筑结构,2012,42(8):65-68,49.
[3] 空间网格结构技术规程:JGJ 7—2010[S].北京:中国建筑工业出版社,2011.
[4] 建筑抗震设计规范:GB 50011—2010[S].北京:中国建筑工业出版社,2010.
[5] 薛彦涛,韦承基,孙仁范,等.采用不能材料加层时结构阻尼比计算方法(应变能法)[J].工程抗震与加固改造,2008(2):91-95.
[6] 徐培福,肖从真,王翠坤,等.架空连廊的震害及设计建议[J].建筑结构,2004,34 (1):51-52.
[7] 李春锋,杜永峰,李慧.弱连体结构非平稳随机地震响应与动力可靠度分析[J].建筑结构,2016,46(16):68-75.
[8] 刘小强,刘杰,梁游钧,等.空间桁架结构的非线性追踪分析理论[J].建筑结构,1997,27(5):28-31.
[9] 梁伟,高银鹰,贾文颖.连体结构的设计与分析[J].建筑结构,2012,42(S1):321-327.
[10] International building code 2000:IBC 200[S].Virginia:International Code Council,2000.
Steel structure design for a large-span conjoined sky curtain in Kunming
Abstract: A conjoined sky curtain in Kunming is a large-span conjoined steel truss connecting a super high-rise tower and a commercial podium in a high-intensity area. The tower adopts a reinforced concrete frame-shear wall structural system, and the commercial podium adopts a reinforced concrete frame structural system. The different connection methods of the connected truss and the main structure were compared, and it was found that the friction pendulum sliding bearing was used for connection, which can significantly reduce the influence on the internal force of the related components of the tower. The elastic analysis and nonlinear buckling stability analysis of the structure were carried out, and the performance analysis method was adopted for the key nodes. At the same time, through the elastoplastic analysis of large earthquakes, the maximum sliding amount of the bearing meets its performance requirements, and the weak links of the structure were strengthened. The finite element analysis of the key nodes had been carried out to verify the reliability of the nodes, and the calculation results meet the structural safety requirements.
Keywords: large-span steel structure; conjoined sky curtain; friction pendulum; multiscale method; performance analysis method
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