大跨度飞机库考虑多维地震输入的动力分析
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摘要
为研究大跨度飞机库结构的地震反应与抗震设计要求,对7度抗震设防、Ⅳ类场地条件下的国内某机库,采用不同地震波,进行了多维地震输入下的动力反应时程分析,考虑地震波沿结构水平单向、双向、三向和竖向输入的不同情况,从结构侧移、柱内力、屋盖结构杆件内力等方面进行了分析.结果表明:在多维地震作用下,地震波沿结构坐标轴正向或反向输入导致结构扭转方向不对称;与单向地震作用相比,多维地震作用可使得柱的一些内力和位移值增加显著;水平和竖向地震分别对屋盖网架和大门桁架起控制作用;三向地震作用下屋盖杆件地震内力总体上显著大于水平或竖向地震单独作用下的地震内力,且地震内力系数较大的杆件数量所占比例大.并分析了屋盖各部位地震内力系数大的杆件的分布情况.据此,建议对这种设计条件的大跨飞机库结构进行三向地震输入的抗震验算.
Time-history response analyses of a long-span hangar based on site-class IV are conducted under different multi-dimensional earthquake inputs for the seismic fortification intensity of 7 to study its seismic response and requirements for seismic design.The lateral displacements of the structure,internal forces of its supporting columns and the members of the roof in the cases of one-,two-and three-dimensional seismic inputs were compared,respectively.The results show that,the dynamic analyses of three-dimensional seismic motions,different directions of the inputs,i.e.,positive or negative along the axis,result in asymmetric global torsions of the structure.Some displacements and internal forces of the columns are increased significantly with multidimensional earthquake inputs,compared with the one-dimensional ones.Seismic inputs in horizontal and vertical directions have different effects on different parts of the roof structure,dominating member forces of the space truss and the truss at the gate,respectively.Member forces of the roof from three-dimensional inputs are,as a whole,significantly greater than those only from inputs in horizontal or vertical directions,and a large portion of members has large seismic coefficients of member force.The distribution of roof members with large values of seismic coefficients was also illustrated.Therefore,it is recommended that,for long-span hangars in such conditions,seismic verification is needed,in which the effects of three-dimensional earthquake should be taken into account.
Time-history response analyses of a long-span hangar based on site-class IV are conducted under different multi-dimensional earthquake inputs for the seismic fortification intensity of 7 to study its seismic response and requirements for seismic design.The lateral displacements of the structure,internal forces of its supporting columns and the members of the roof in the cases of one-,two-and three-dimensional seismic inputs were compared,respectively.The results show that,the dynamic analyses of three-dimensional seismic motions,different directions of the inputs,i.e.,positive or negative along the axis,result in asymmetric global torsions of the structure.Some displacements and internal forces of the columns are increased significantly with multidimensional earthquake inputs,compared with the one-dimensional ones.Seismic inputs in horizontal and vertical directions have different effects on different parts of the roof structure,dominating member forces of the space truss and the truss at the gate,respectively.Member forces of the roof from three-dimensional inputs are,as a whole,significantly greater than those only from inputs in horizontal or vertical directions,and a large portion of members has large seismic coefficients of member force.The distribution of roof members with large values of seismic coefficients was also illustrated.Therefore,it is recommended that,for long-span hangars in such conditions,seismic verification is needed,in which the effects of three-dimensional earthquake should be taken into account.
引文
[1]朱丹,裴永忠,赵天佑.广州新白云机场GAMECO飞机维修机库屋盖结构设计[J].工业建筑,2005,35(12):80-83.ZHU Dan,PEI Yong-zhong,ZHAO Tian-you.The roof structure design of GAMECO hangar at new baiyun international airport in Guangzhou[J].Industrial Construction,2005,35(12):80-83.(in Chinese)
[2]钱稼茹,张微敬,朱丹,等.北京A380机库结构地震反应分析[J].土木工程学报,2008,41(2):9-16.QIAN Jia-ru,ZHANG Wei-jing,ZHU Dan,et al.Earthquake response analysis of Beijing A380hangar structure[J].China Civil Engineering Journal,2008,41(2):9-16.(in Chinese)
[3]沈顺高,张微敬,朱丹,等.大跨度机库结构多点输入地震反应分析[J].土木工程学报,2008,41(2):17-21.SHEN Shun-gao,ZHANG Wei-jing,ZHU Dan,et al.Seismic response analysis of two long-span hangars under multiple support excitations[J].China Civil Engineering Journal,2008,41(2):17-21.(in Chinese)
[4]白嘉,赵均,朱丹,等.大跨度维修机库弹塑性地震反应分析[J].建筑结构,2009,39(S1):86-89.BAI Jia,ZHAO Jun,ZHU Dan,et al.Elasto-plastic seismic response analysis of a long-span hangar[J].Building Structure,2009,39(S1):86-89.(in Chinese)
[5]张毅刚,曹资.厦门太古飞机工程维修基地网架抗震分析[J].空间结构,1999,5(1):35-42.ZHANG Yi-gang,CAO Zi.A seismic analysis for space frame of hanger in Xiamen Taigu Aircraft maintaince base[J].SpatialStructures,1999,5(1):35-42.(in Chinese)
[6]张作运,刘满怀,刘辰.海航机库计算分析[J].工业建筑,2008,38(增刊):630-632.ZHANG Zuo-yun,LIU Man-huai,LIU Chen.Calculation and analysis of Hainan airline hangar[J].Industrial Construction,2008,38(supp):630-632.(in Chinese)
[7]陈家坤,王军.我国最大的悬臂结构机库设计与竖向地震力的试验研究[J].工业建筑,2005,35(增刊):150-153.CHEN Jia-kun,WANG Jun.Design of the biggest cantilever structure garage in our country and trial research of the vertical earthquake force[J].Industrial Construction,2008,35(supp):150-153.(in Chinese)
[8]中华人民共和国建设部.GB50011—2001建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.
[9]北京金土木软件技术有限公司,中国建筑设计研究院.SAP2000中文版使用指南[M].北京:人民交通出版社,2006:306-345.
[10]中国建筑科学研究院,浙江大学.JGJ7—91网架结构设计与施工规程[S].北京:中国建筑工业出版社,1992.
[2]钱稼茹,张微敬,朱丹,等.北京A380机库结构地震反应分析[J].土木工程学报,2008,41(2):9-16.QIAN Jia-ru,ZHANG Wei-jing,ZHU Dan,et al.Earthquake response analysis of Beijing A380hangar structure[J].China Civil Engineering Journal,2008,41(2):9-16.(in Chinese)
[3]沈顺高,张微敬,朱丹,等.大跨度机库结构多点输入地震反应分析[J].土木工程学报,2008,41(2):17-21.SHEN Shun-gao,ZHANG Wei-jing,ZHU Dan,et al.Seismic response analysis of two long-span hangars under multiple support excitations[J].China Civil Engineering Journal,2008,41(2):17-21.(in Chinese)
[4]白嘉,赵均,朱丹,等.大跨度维修机库弹塑性地震反应分析[J].建筑结构,2009,39(S1):86-89.BAI Jia,ZHAO Jun,ZHU Dan,et al.Elasto-plastic seismic response analysis of a long-span hangar[J].Building Structure,2009,39(S1):86-89.(in Chinese)
[5]张毅刚,曹资.厦门太古飞机工程维修基地网架抗震分析[J].空间结构,1999,5(1):35-42.ZHANG Yi-gang,CAO Zi.A seismic analysis for space frame of hanger in Xiamen Taigu Aircraft maintaince base[J].SpatialStructures,1999,5(1):35-42.(in Chinese)
[6]张作运,刘满怀,刘辰.海航机库计算分析[J].工业建筑,2008,38(增刊):630-632.ZHANG Zuo-yun,LIU Man-huai,LIU Chen.Calculation and analysis of Hainan airline hangar[J].Industrial Construction,2008,38(supp):630-632.(in Chinese)
[7]陈家坤,王军.我国最大的悬臂结构机库设计与竖向地震力的试验研究[J].工业建筑,2005,35(增刊):150-153.CHEN Jia-kun,WANG Jun.Design of the biggest cantilever structure garage in our country and trial research of the vertical earthquake force[J].Industrial Construction,2008,35(supp):150-153.(in Chinese)
[8]中华人民共和国建设部.GB50011—2001建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.
[9]北京金土木软件技术有限公司,中国建筑设计研究院.SAP2000中文版使用指南[M].北京:人民交通出版社,2006:306-345.
[10]中国建筑科学研究院,浙江大学.JGJ7—91网架结构设计与施工规程[S].北京:中国建筑工业出版社,1992.
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