地震作用下相邻结构的防震缝宽度确定方法
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摘要
目前中国现行抗震设计规范中所规定的防震缝宽度取值一般较小,且缺乏理论依据,不能有效防止地震作用下相邻建筑之间发生碰撞,为此对相邻结构在地震作用下的最大相对位移进行研究。分别讨论周期比、高度比等因素的影响作用,在此基础上给出两单自由度体系最大相对位移的计算方法,并进而确定相邻结构的防震缝宽度。结果表明:任意高度比的相邻单自由度体系最大相对位移可由高度比为1和0两种情况求得;所提出的防震缝宽度确定方法的计算结果与时程分析结果较为接近,说明所提方法较为准确,可以用于相邻结构防震缝宽度的设计。
Because the width of seismic gaps demanded in the existing seismic design code in China is generally small and lacks theoretical supports,the pounding between adjacent buildings during ground motions may not be avoided completely.The maximum relative displacement between adjacent structures during earthquakes was studied.The effects of period ratio,height ratio were discussed.The maximum relative displacement for any height ratio can be calculated from the two cases that height ratio equals 1 and 0.Based on the conclusion,the method on calculating the maximum relative displacement of adjacent single degree of freedom(SDOF) systems was proposed,and the width of seismic gaps can be also designed.The results by the method are close with those of time history analysis.This indicates that the method is accurate and can be used in the design of the seismic gaps between adjacent buildings.
Because the width of seismic gaps demanded in the existing seismic design code in China is generally small and lacks theoretical supports,the pounding between adjacent buildings during ground motions may not be avoided completely.The maximum relative displacement between adjacent structures during earthquakes was studied.The effects of period ratio,height ratio were discussed.The maximum relative displacement for any height ratio can be calculated from the two cases that height ratio equals 1 and 0.Based on the conclusion,the method on calculating the maximum relative displacement of adjacent single degree of freedom(SDOF) systems was proposed,and the width of seismic gaps can be also designed.The results by the method are close with those of time history analysis.This indicates that the method is accurate and can be used in the design of the seismic gaps between adjacent buildings.
引文
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[11]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 Hong-de,LAN Zong-jian.Discussion on structuralcollision between adjacent buildings[J].Industrial Con-struction,2002,32(4):49-52.
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[2]KASAI,KAZUHIKO,MAISON,et al.Building poun-ding damage during the 1989 Loma Prieta earthquake[J].Engineering Structures,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 Tsinghua University,XinanJiaotong University,Beijing Jiaotong University.Analysison seismic damage of buildings in the Wenchuan earth-quake[J].Journal of Building Structures,2008,29(4):1-9.
[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 Ya-yong.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.
[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 Jing-yu.Reflections on countermeasures and re-sponses of joints of structures in Wenchuan earthquake[J].Journal of Xihua University:Natural Science Edi-tion,2009,28(4):83-85,108.
[6]门进杰,史庆轩,陈曦虎.汶川地震对远震区高层建筑造成的震害及设计建议[J].西安建筑科技大学学报,2008,40(5):648-653.MEN Jin-jie,SHI Qing-xuan,CHEN Xi-hu.Seismicdamage of high buildings caused in the ramote areas fromepicenter and aseismic design suggestion[J].Journal ofXian University of Architecture&Technology,2008,40(5):648-653.
[7]中华人民共和国住房和城乡建设部.GB50011—2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.
[8]PAPADRAKAKIS,MANOLIS,MOUZAKIS.Earthquakesimulator testing of pounding between adjacent buildings[J].Earthquake Engineering&Structural Dynamics,1995,24(6):811-834.
[9]熊海贝,朱伯龙,陆雪平.高层建筑复杂体型设置防震缝的研究[J].四川建筑科学研究,1996,22(3):27-31.XIONG Hai-bei,ZHU Bo-long,LU Xue-ping.Study onseismic gaps of high rise building with complex structures[J].Building Science Research of Sichuan,1996,22(3):27-31.
[10]KASAI K,JAGIASI A R,VAN J.Inelastic vibrationphase theory for seismic pounding mitigation[J].Jour-nal of Structural Engineering,1996,122(10):1136-1146.
[11]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 Hong-de,LAN Zong-jian.Discussion on structuralcollision between adjacent buildings[J].Industrial Con-struction,2002,32(4):49-52.
[12]孟庆利,徐盛增.相邻结构地震碰撞研究简述[J].世界地震工程,2003,19(4):68-72.MENG Qing-li,XU Sheng-zeng.A simplified review onthe seismic pounding of adjacent building[J].WorldEarthquake Engineering,2003,19(4):68-72.
[13]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 Tian-qi.Researches on the problems related to“code for aseismic design of buildings”(GB 50011—2001)[J].Industrial Construction,2005,35(8):110-113,116.
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