防屈曲支撑空冷岛结构体系的抗震性能
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摘要
通过单向地震作用下的时程分析,指出了现有空冷岛结构体系抗震性能的不足,对增设与不增设防屈曲支撑的结构体系进行了对比,并对双向地震作用下防屈曲支撑空冷岛结构体系的受力性能进行了初步研究,最后给出了一种能够实现超长防屈曲支撑的方法。结果表明:增设防屈曲支撑后的空冷岛结构基本规避了地震作用下的整体扭转变形影响;当双向布置的防屈曲支撑均发生屈服后结构扭转变形有增大的趋势。
Through time history analysis under single-component earthquake excitations,the deficiencies of the seismic performance of the exiting structural system of air-cooled condenser were pointed out.Comparisons between the structural system with and without buckling-restrained braced(BRB) supporting systems were carried out.The mechanical behaviors of BRB structural system of air-cooled condenser under two-component earthquake excitations were preliminarily studied,and a connecting procedure of the super-long BRB was proposed.The results show that the influences of overall torsion deformation under earthquake excitations are prohibited efficiently by adding BRB to the existing structural system of air-cooled condenser,and the torsion deformation has an increase trend after yielding of the BRB in two-component arrangement of the structural system.
Through time history analysis under single-component earthquake excitations,the deficiencies of the seismic performance of the exiting structural system of air-cooled condenser were pointed out.Comparisons between the structural system with and without buckling-restrained braced(BRB) supporting systems were carried out.The mechanical behaviors of BRB structural system of air-cooled condenser under two-component earthquake excitations were preliminarily studied,and a connecting procedure of the super-long BRB was proposed.The results show that the influences of overall torsion deformation under earthquake excitations are prohibited efficiently by adding BRB to the existing structural system of air-cooled condenser,and the torsion deformation has an increase trend after yielding of the BRB in two-component arrangement of the structural system.
引文
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[10]GB 50011—2010,建筑抗震设计规范[S].GB 50011—2010,Code for Seismic Design of Build-ings[S].
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[12]江磊鑫,郭彦林.屈曲延迟型增强构件的设计方法[J].建筑科学与工程学报,2010,27(2):75-82.JIANG Lei-xin,GUO Yan-lin.Design Method ofBuckling-delayed Reinforced Members[J].Journal ofArchitecture and Civil Engineering,2010,27(2):75-82.
[2]白国良,刘林,李晓文,等.空冷支架结构基于内容物的性能设计方法研究[J].建筑结构学报,2008,29(5):107-113.BAI Guo-liang,LIU Lin,LI Xiao-wen,et al.Study onPerformance Design Method Based on Internal Equip-ment of Support Structure System of Air Cooled Con-denser[J].Journal of Building Structures,2008,29(5):107-113.
[3]白国良,朱丽华,赵春莲,等.工作荷载与地震作用下直接空冷结构体系模型试验研究[J].建筑结构学报,2008,29(5):42-49.BAI Guo-liang,ZHU Li-hua,ZHAO Chun-lian,et al.Model Test on Behavior of Direct Air Cooled Con-denser Support Platform Under Service Load and Earthquake Action[J].Journal of Building Struc-tures,2008,29(5):42-49.
[4]姚泽良,白国良,党发宁,等.钢桁架-钢筋混凝土管柱结构抗震性能研究[J].建筑结构学报,2011,32(1):30-36.YAO Ze-liang,BAI Guo-liang,DANG Fa-ning,et al.Study on Seismic Behavior of a Steel Truss-reinforcedConcrete Column Structure[J].Journal of BuildingStructures,2011,32(1):30-36.
[5]郭彦林,王小安,江磊鑫.装配式防屈曲支撑构件及框架设计理论[J].结构工程师,2010,26(6):164-176.GUO Yan-lin,WANG Xiao-an,JIANG Lei-xin.De-sign Theory of Assembled Buckling-restrained Bracesand Buckling-restrained Braced Frames[J].StructuralEngineers,2010,26(6):164-176.
[6]郭彦林,刘建彬,蔡益燕,等.结构的耗能减震与防屈曲支撑[J].建筑结构,2005,35(8):18-23.GUO Yan-lin,LIU Jian-bin,CAI Yi-yan,et al.Struc-tural Energy Dissipation and Seismic MitigationMethod and Buckling-restrained Brace[J].BuildingStructure,2005,35(8):18-23.
[7]徐培福,黄吉锋,韦承基.高层建筑结构在地震作用下的扭转振动效应[J].建筑科学,2000,16(1):1-6.XU Pei-fu,HUANG Ji-feng,WEI Cheng-ji.Responseof Torsional Vibration of Tall Building Structures In-duced by Seismic Action[J].Building Science,2000,16(1):1-6.
[8]刘畅.地震作用下偏心结构扭转反应研究[D].长沙:湖南大学,2007.LIU Chang.Study on Torsion Response of EccentricStructures Under Seismic Action[D].Changsha:Hu-nan University,2007.
[9]刘畅,邹银生.偶然偏心引起的结构地震扭转效应研究[J].工程抗震与加固改造,2006,28(3):12-14,20.LIU Chang,ZOU Yin-sheng.Response of SeismicTorsional Vibration Induced by Accidental Eccentri-city[J].Earthquake Resistant Engineering and Retro-fitting,2006,28(3):12-14,20.
[10]GB 50011—2010,建筑抗震设计规范[S].GB 50011—2010,Code for Seismic Design of Build-ings[S].
[11]郭彦林,江磊鑫.双矩管带肋约束型装配式防屈曲支撑的设计方法[J].建筑科学与工程学报,2010,27(2):67-74.GUO Yan-lin,JIANG Lei-xin.Design Method ofBuckling-restrained Braces Assembled with Dual Rib-bed Rectangular Hollow[J].Journal of Architectureand Civil Engineering,2010,27(2):67-74.
[12]江磊鑫,郭彦林.屈曲延迟型增强构件的设计方法[J].建筑科学与工程学报,2010,27(2):75-82.JIANG Lei-xin,GUO Yan-lin.Design Method ofBuckling-delayed Reinforced Members[J].Journal ofArchitecture and Civil Engineering,2010,27(2):75-82.
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