地震作用下相邻建筑结构的最大相对位移
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摘要
为确定合理的防震缝宽度,对地震作用下相邻结构的最大相对位移进行研究。定义最大相对位移系数,并选取对应于硬土、中硬土、软土场地条件下的实际地震动记录各100条,讨论相邻结构周期比、高度比、位移延性系数比以及场地条件对最大相对位移系数的影响作用。通过研究发现,最大相对位移系数受相邻结构的周期比、高度比、位移延性系数比的影响较为显著;不同场地条件下最大相对位移系数差别不大,可近似忽略场地条件对最大相对位移系数的影响作用。为便于工程应用,拟合了相邻结构最大相对位移系数计算公式,利用该计算公式,可求得地震作用下相邻结构的最大相对位移,并为抗震设计中确定相邻结构的防震缝宽度提供理论依据。
In order to give the reasonable width of seismic gaps,the maximum relative displacement between adjacent buildings was studied in this paper.The coefficient of maximum relative displacement was defined,then 100 earthquake records corresponding to stiff,medium stiff and soft soil sites were selected respectively to study the effects of the period ratio,height ratio,and displacement ductility coefficient ratio and soil site on the coefficient of maximum relative displacement.It can be found that the effects of the period ratio,height ratio,displacement ductility coefficient ratio on the coefficient of maximum relative displacement are distinctive,while the difference of the coefficient of maximum relative displacement for the three types of soil sites is small,and it can be concluded that the effects of different sites can be ignored.For convenient of application,formulas for the coefficient of maximum relative displacement were obtained via data fitting.Utilizing the proposed formulas,the maximum relative displacement between adjacent structures can be calculated and then the theoretical width of seismic gaps can be obtained for seismic design.
In order to give the reasonable width of seismic gaps,the maximum relative displacement between adjacent buildings was studied in this paper.The coefficient of maximum relative displacement was defined,then 100 earthquake records corresponding to stiff,medium stiff and soft soil sites were selected respectively to study the effects of the period ratio,height ratio,and displacement ductility coefficient ratio and soil site on the coefficient of maximum relative displacement.It can be found that the effects of the period ratio,height ratio,displacement ductility coefficient ratio on the coefficient of maximum relative displacement are distinctive,while the difference of the coefficient of maximum relative displacement for the three types of soil sites is small,and it can be concluded that the effects of different sites can be ignored.For convenient of application,formulas for the coefficient of maximum relative displacement were obtained via data fitting.Utilizing the proposed formulas,the maximum relative displacement between adjacent structures can be calculated and then the theoretical width of seismic gaps can be obtained for seismic design.
引文
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[6]GB50011—2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010(GB50011—2010Code for seismicdesign of buildings[S].Beijing:China Architecture&Building Press,2001(in Chinese))
[7]Lin J H.Separation distance to avoid seismic pounding ofadjacent buildings[J].Earthquake Engineering&Structural Dynamics,1997,26(3):395-403
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[10]宋天齐.《建筑抗震设计规范》(GB50011—2001)有关问题研究[J].工业建筑,2005,35(8):110-113,116(Song Tianqi.Research on the problems related to“codefor aseismic designof buildings”(GB 50011—2001)[J].Industrial Construction,2005,35(8):110-113,116(inChinese))
[11]Karayannis C G,Favvata M J.Earthquake-induced interactionbetween adjacent reinforced concrete structures with non-equal heights[J].Earthquake Engineering&StructuralDynamics,2005,34(1):1-20
[2]Kasai K,Maison B F.Building pounding damage duringthe 1989 Loma Prieta earthquake[J].EngineeringStructures,1997,19(3):195-207
[3]清华大学,西南交通大学,北京交通大学土木工程结构专家组.汶川地震建筑震害分析[J].建筑结构学报,2008,29(4):1-9(Civil and Structural Groups of TsinghuaUniversity,Xinan Jiaotong University and Beijing JiaotongUniversity.Analysis on seismic damage of buildings in theWenchuan earthquake[J].Journal of Building Structures,2008,29(4):1-9(in Chinese))
[4]王亚勇.汶川地震建筑震害启示——三水准设防和抗震设计基本要求[J].建筑结构学报,2008,29(4):26-33(Wang Yayong.Lessons learnt from building damages inthe Wenchuan earthquake—three earthquake performanceobjectives and basic requirements for seismic design ofbuildings[J].Journal of Building Structures,2008,29(4):26-33(in Chinese))
[5]张泾钰.建筑物的变形缝在汶川地震中的反应及对策思考[J].西华大学学报:自然科学版,2009,28(4):83-85,108(Zhang Jingyu.Reflections on countermeasures andresponses of joints of structures in Wenchuan earthquake[J].Journal of Xihua University:Natural Science Edition,2009,28(4):83-85,108(in Chinese))
[6]GB50011—2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010(GB50011—2010Code for seismicdesign of buildings[S].Beijing:China Architecture&Building Press,2001(in Chinese))
[7]Lin J H.Separation distance to avoid seismic pounding ofadjacent buildings[J].Earthquake Engineering&Structural Dynamics,1997,26(3):395-403
[8]Hao H,Shen J.Estimation of relative displacement of twoadjacent asymmetric structures[J].EarthquakeEngineering&Structural Dynamics,2001,30(1):81-96
[9]邹宏德,蓝宗建.相邻建筑结构碰撞问题的探讨[J].工业建筑,2002,32(4):49-52(Zou Hongde,LanZongjian.Discussion on structural collision betweenadjacent buildings[J].Industrial Construction,2002,32(4):49-52(in Chinese))
[10]宋天齐.《建筑抗震设计规范》(GB50011—2001)有关问题研究[J].工业建筑,2005,35(8):110-113,116(Song Tianqi.Research on the problems related to“codefor aseismic designof buildings”(GB 50011—2001)[J].Industrial Construction,2005,35(8):110-113,116(inChinese))
[11]Karayannis C G,Favvata M J.Earthquake-induced interactionbetween adjacent reinforced concrete structures with non-equal heights[J].Earthquake Engineering&StructuralDynamics,2005,34(1):1-20
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