不规则结构的扭转效应控制研究
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摘要
形状不规则建筑物在地震作用下极易发生扭转效应的破坏,而减小不规则结构的扭转效应是保证其抗震性能的重要途径。研究结构扭转效应的控制方法,可以为不规则结构抗震性能的保障提供依据。文章以平面形状不规则的框架结构为例,采用数值分析方法,对设置不同隔震层的结构进行了模态分析和地震反应计算,通过比较不同隔震方案的结构层间扭转角研究了结构扭转效应的控制效果。结果表明:基础隔震建筑上部结构的地震反应比非隔震建筑地震反应明显降低,扭转效应也显著减小;采用橡胶支座加滑板支座的组合隔震体系比全部采用橡胶支座的减震效果更优;通过调整支座布置方式,可以使不规则结构的扭转效应得到有效控制。
Under the action of earthquake,the irregularly shaped structure would be destroyed due to obvious torsion effect. Reducing the torsion effect is an important approach to ensure the seismic performance of irregular structure. The research on the torsion effect control could provide evidence to ensure the seismic performance of irregular structure. With numerical analysis method,the seismic responses of an irregularly shaped frame structure with different isolation layers were calculated in this paper through comparing relative torsion angle of structures with different isolation layer. The results show that the seismic responses of base-isolated buildings are significantly lower than those of nonisolated building,as well as the torsional responses. The combined system is more effective in seismic isolation than the rubber bearings alone. Torsional responses of irregularly structure are effectively controlled by adjusting the bearing arrangement.
Under the action of earthquake,the irregularly shaped structure would be destroyed due to obvious torsion effect. Reducing the torsion effect is an important approach to ensure the seismic performance of irregular structure. The research on the torsion effect control could provide evidence to ensure the seismic performance of irregular structure. With numerical analysis method,the seismic responses of an irregularly shaped frame structure with different isolation layers were calculated in this paper through comparing relative torsion angle of structures with different isolation layer. The results show that the seismic responses of base-isolated buildings are significantly lower than those of nonisolated building,as well as the torsional responses. The combined system is more effective in seismic isolation than the rubber bearings alone. Torsional responses of irregularly structure are effectively controlled by adjusting the bearing arrangement.
引文
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[13]王铁成,徐明贵,全明.单轴偏心基础隔震结构的振动台试验及理论分析[J].华南理工大学学报,2011,39(9)54-60.
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[15]刘惠利,刘文光.隔震结构设计与分析方法探讨[J].广州大学学报(自然科学版),2005,171-175.
[16]党育,杜永峰.不对称大底板多塔楼隔震结构的地震响应分析[J].防灾减灾工程学报,2012,32(4),452-458.
[17]石艳旺.不规则建筑的扭转效应控制研究[D].济南:山东建筑大学,2016.
[2]郝敏,谢礼立,王家全.921台湾集集地震灾害最严重地区的烈度评定[J].世界地震工程,2006,22(4):22-26.
[3]江宜城,唐家祥.单轴偏心的单层隔震框架结构地震扭转反应分析[J].世界地震工程,1999,27(6):57-61.
[4]刘鑫刚,张玲,马伯涛,等.成都博物馆基础隔震不规则结构扭转效应控制研究[J].建筑结构学报,2016(37)24-29.
[5]干洪,罗辉.考虑扭转效应的平面不规则大底盘单塔楼减震性能分析[J].安徽建筑工程学院报,2014,22(2):19-21.
[6]Faramarz K.,Imani A.A..Effect of two horizontal components of earthquake on nonlinear response of torsionally coupled base isolated structures[J].Structural Design of Tall and Special Buildings,2011,20(8):986~1018.
[7]Tena-Colunga A.,Gómez-Soberón A..Torsional response of base-isolated structures due to asymmetries in the superstructure[J].Engineering Structures 2002,24(12):1587-1599.
[8]肖明葵,郑猛,昌继胜,等.不规则框架结构的组合隔震反应分析[J].地震工程与工程振动,2012,32(4):174-181.
[9]党育,霍凯成.偏心隔震结构扭转效应的影响因素分析[J].武汉:武汉理工大学学报,2010,32(14):137-141.
[10]王俊.不规则基础隔震结构隔震和扭转效应分析[D].合肥:安徽建筑大学,2016.
[11]武梦雅,王梦圆,李玉荣.偏心基础滑移隔震结构双向水平地震反应分析[J].安徽理工大学学报,2014,39(2):35-37.
[12]刘德稳,王琼芬,吴跃红.不规则结构隔震设计与研究[J].沈阳建筑大学学报,2013,29(6):1041-1046.
[13]王铁成,徐明贵,全明.单轴偏心基础隔震结构的振动台试验及理论分析[J].华南理工大学学报,2011,39(9)54-60.
[14]Tena-Colunga A.,Zambrana-Rojas C..Dynamic torsional amplifications of base-isolated structures with an eccentric isolation system[J].Engineering Structure,2006,28(1):72-83.
[15]刘惠利,刘文光.隔震结构设计与分析方法探讨[J].广州大学学报(自然科学版),2005,171-175.
[16]党育,杜永峰.不对称大底板多塔楼隔震结构的地震响应分析[J].防灾减灾工程学报,2012,32(4),452-458.
[17]石艳旺.不规则建筑的扭转效应控制研究[D].济南:山东建筑大学,2016.