在抗震设计中带加强层框架-核心筒混合结构合理刚度的评价
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摘要
带加强层的框架-核心筒混合结构广泛用于超高层建筑,在高烈度地区的抗震设计中,加强层刚度的选择对结构位移和相关构件的承载力有显著影响,这也成为性能化设计中的重点,一般要通过多次调整试算才能达到合适的状态。为了减少反复调整的工作量,在设计中寻找一种简单可行的刚度评估方法,以弹性阶段刚度解析为基础,结合对位移的控制,讨论各组成部分之间的刚度协调关系,得出了这种结构的刚度评估方法和刚度参数的合理取值范围。最后,以8度区某实际的带加强层钢管混凝土框架-型钢混凝土核心筒混合结构为例,应用上述方法对此结构进行了调整优化,经弹性和动力弹塑性分析及振动台试验表明,调整后的结构更趋于合理状态。
Frame-concrete corewall hybrid structure with strengthened story is widely used in tall buildings.In high intensity zone,stiffness of strengthened story has significant influence on displacement of the structure and bearing capacity of relative members in seismic design,which becomes a key step in performance-based seismic design.The method of try and error is usually adopted while selecting the stiffness.In order to reduce the work and search a simple method for assessing the stiffness of this structure,stiffness harmonization of components considering displacement controlling based on stiffness analysis was discussed,a method of assessing stiffness and reasonable range of parameters were suggested.Lastly,as an example,this method was applied in the design of a concrete-filled steel tube frame-corewall structure with strengthened story.The result shows that the method is feasible for the design through elastic analysis,elasto-plastic analysis and shaking-table test.
Frame-concrete corewall hybrid structure with strengthened story is widely used in tall buildings.In high intensity zone,stiffness of strengthened story has significant influence on displacement of the structure and bearing capacity of relative members in seismic design,which becomes a key step in performance-based seismic design.The method of try and error is usually adopted while selecting the stiffness.In order to reduce the work and search a simple method for assessing the stiffness of this structure,stiffness harmonization of components considering displacement controlling based on stiffness analysis was discussed,a method of assessing stiffness and reasonable range of parameters were suggested.Lastly,as an example,this method was applied in the design of a concrete-filled steel tube frame-corewall structure with strengthened story.The result shows that the method is feasible for the design through elastic analysis,elasto-plastic analysis and shaking-table test.
引文
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[2]聂建国.钢-混凝土组合结构原理与实例[M].北京:科学出版社,2009.
[3]汪大绥,周建龙.我国高层建筑钢-混凝土混合结构发展与展望[J].建筑结构学报,2010,31(6):62-70.
[4]王翠坤,田春雨,肖从真.高层建筑中钢-混凝土混合结构的研究及应用进展[J].建筑结构,2011,41(11):28-33.
[5]张令心,郭丰雨.钢-混凝土混合结构抗震研究评述[J].地震工程与工程振动,2004,24(3):51-56.
[6]Structural Engineering Association of California.A framework for performance-based engineering(SEAOC Vision2000)[S].1995.
[7]周锡元.抗震性能设计与三水准设防[J].土木水利(台湾),2003,30(5):21-32.
[8]程耿东.基于功能的结构抗震中一些问题的探讨[J].建筑结构学报,2000,21(1):5-11.
[9]全国超限高层建筑工程抗震设防审查专家委员会抗震设防专项审查办法[S].北京:中华人民共和国建设部,2003.
[10]超限高层建筑工程抗震设防专项审查技术要点[S].北京:中华人民共和国建设部,2003.
[11]徐培福,王亚勇,戴国莹.关于超限高层建筑抗震设防审查的若干讨论[J].土木工程学报,2004,37(1):1-6.
[12]田淑明,聂建国,尚志海,等.钢管混凝土框架-混凝土核心筒混合结构弹塑性分析[J].建筑结构,2010,40(2):17-21.
[13]SMITH STAFFORD B,SALIM IRAWAN.Parameter study of outrigger-braced tall building structures[J].Journal of Structure Engineering,1981,107(ST10):2001-2014.
[14]聂建国,田淑明.框架-混凝土核心筒混合结构位移限值的探讨[J].建筑结构,2012,42(4):28-33.
[15]郭子雄,吕西林,王亚勇.建筑结构抗震变形验算中层间弹性位移角限值的研讨[J].工程抗震,1998,36(2):1-6.
[16]FINTEL M.Quake lesson from Managua:revise concrete building design[J].Civil Engineering,ASCE,1973(8):60-63.
[17]傅学怡.实用高层建筑结构设计[M].北京:中国建筑工业出版社,1999.
[18]HOENDERKAMP J C D.Shear wall with outrigger trusses on wall and column foundations[J].The Structural Design of Tall and Special Buildings,2004,13(1):73-87.
[19]GB50223—2008建筑工程抗震设防分类标准[S].北京:中国建筑工业出版社,2008.
[20]LI KANGNING.Canny for3D nonlinear static and dynamic structural analysis[M].Singapore:Canny Consult Incorporation Limited,2006.
[21]北京财富中心二期写字楼结构模型振动台抗震试验研究报告[R].上海:同济大学土木工程防灾国家重点实验室振动台实验室,2010.
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