防屈曲支撑在偏心钢框架中的减震控制研究
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摘要
运用有限元分析软件SAP2000对某偏心钢框架和在原框架基础上设置防屈曲支撑的3种方案进行了模态分析和时程分析,比较了它们的周期比、位移比及层间位移等.结果表明:合理地设置防屈曲支撑可以有效的控制偏心结构的扭转效应,并减小结构的侧向水平位移和层间位移;在大震下,能够降低结构的加速度反应,耗散大部分地震能量,保护主体结构.
In this paper,based on finite element analysis software SAP2000,an eccentric steel frame was compared with three kinds of control plans with buckling-restrained braces in mode analysis and time history analysis,comparing period ratios,displacement ratios and inter-story displacement.The results show that the torsional deformation of the structure can be controlled effectively.Besides,horizontal displacements and story drifts are reduced.Further,the acceleration responses are decreased,and buckling-restrained braces can consume most of the seismic energy under strong earthquakes,so the main structure can not be damaged.
In this paper,based on finite element analysis software SAP2000,an eccentric steel frame was compared with three kinds of control plans with buckling-restrained braces in mode analysis and time history analysis,comparing period ratios,displacement ratios and inter-story displacement.The results show that the torsional deformation of the structure can be controlled effectively.Besides,horizontal displacements and story drifts are reduced.Further,the acceleration responses are decreased,and buckling-restrained braces can consume most of the seismic energy under strong earthquakes,so the main structure can not be damaged.
引文
[1]郭仕群.使用偏心支撑减小不规则高层建筑的扭转振动反应[J].地震工程与工程振动,2005,25(3):76—80.
[2]程光煜,叶列平,朱兴刚.偏心结构消能减震技术的分析研究[J].工程抗震与加固改造,2006,28(2):78—83.
[3]邓雪松,聂一恒,汤统壁,等.某周期比超限偏心结构地震反应控制分析[J].地震工程与工程振动,2009,29(3):153—159.
[4]GB50011—2001(2008年版),建筑抗震设计规范[S].
[5]JG J3—2002,高层建筑混凝土结构技术规程[S].
[2]程光煜,叶列平,朱兴刚.偏心结构消能减震技术的分析研究[J].工程抗震与加固改造,2006,28(2):78—83.
[3]邓雪松,聂一恒,汤统壁,等.某周期比超限偏心结构地震反应控制分析[J].地震工程与工程振动,2009,29(3):153—159.
[4]GB50011—2001(2008年版),建筑抗震设计规范[S].
[5]JG J3—2002,高层建筑混凝土结构技术规程[S].
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