大跨屋盖隔震设计与地震反应分析
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摘要
隔震技术在高层结构中发展较为成熟,在发达国家的地震高烈度区有较好的应用。隔震技术在大跨空间结构中已有所应用,但相关的研究及应用相对较少。本文选取抗震设防烈度为7度(0.15g)地区的一类典型的钢结构大跨屋盖为对象进行隔震设计与分析。为减小整体结构在地震作用下的反应,本文为桁架屋盖设计了隔震方案,通过地震作用时程分析研究了隔震结构的抗震性能。隔震结构与非隔震结构的地震反应分析表明,隔震设计能显著减小钢结构屋面的地震作用。合理的隔震方案不仅可以降低混凝土柱自身及屋盖与柱连接节点的设计难度,而且能降低平米用钢量,具有良好的社会效益和经济效益。
The techniques for isolation building have been mature in engineering with well applications. But the isolation design and investigation for long span space structure only are studied recently. In this paper,a structural seismic isolated design method is proposed for gymnasium with long span truss roof. Seismic analysis is also conducted considering the seismic precautionary intensity of 7( 0. 15 g). The results of the analysis demonstrate that the layout of the isolation can reduce the earthquake effect for the long span roof and can also reduce the number of steel for the construction. Moreover,the suitable layout arrangement of the isolation can reduce the interaction force between the roof and concrete columns.
The techniques for isolation building have been mature in engineering with well applications. But the isolation design and investigation for long span space structure only are studied recently. In this paper,a structural seismic isolated design method is proposed for gymnasium with long span truss roof. Seismic analysis is also conducted considering the seismic precautionary intensity of 7( 0. 15 g). The results of the analysis demonstrate that the layout of the isolation can reduce the earthquake effect for the long span roof and can also reduce the number of steel for the construction. Moreover,the suitable layout arrangement of the isolation can reduce the interaction force between the roof and concrete columns.
引文
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[2]黄海生,王柏生.基础隔震建筑非线性动力响应的时程计算方法[J].振动与冲击,2005,24(3):50-52.HUANG Haisheng,WANG Baisheng.Nonliner calculation method for time history of dynamic response of multistory base isolation building[J].Journal of Vibration and Shock,2005,24(3):50-52.(in Chinese)
[3]周福霖.工程结构减震控制[M],北京:地震出版社,1997.ZHOU Fulin.Engineering Structure Vibration Control.[M].Beijing:Seismic Press,1997:60-63.(in Chinese)
[4]王曙光,陆伟东,刘伟庆,等.昆明新国际机场航站楼基础隔震设计及抗震性能分析[J].振动与冲击,2011,30(11):260-265.WANG Shuguang,LU Weidong,LIU Weiqing,et al.Seismic isolation design and dynamic analysis of kunming new international airport terminal[J].Journal of Vibration and Shock,2011,30(11):260-265.(in Chinese)
[5]夏东平,张志强,李爱群,等.大跨屋盖隔震结构弹塑性分析[J].建筑结构,2012,42:179-185.XIA Dongping,ZHANG Zhiqiang,LI Aiqun,et al.Elasto-plastic analysis of along-span roof-isolated structure[J].Journal of Buiding Structure,2012,42:179-185.(in Chinese)
[6]GB50011-2010建筑抗震设计规范[M].北京:中国建筑工业出版社,2010.GB50011-2010 Code for Seismic Design of Buildings[M].Beijing:China Building Industry,2010.(in Chinese)
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