建筑结构增设赘余斜拉杆的性能分析
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摘要
为了提高建筑结构在大震作用下的抗倒塌能力,对建筑结构增设赘余斜拉杆来增加结构受力赘余度和抗震储备能力,提高第二道防线的抗震能力,继而提高结构体系在大震下的抗倒塌能力。为得到增设赘余斜拉杆后的建筑结构在罕遇地震下的弹塑性响应,对单质点结构体系增设赘余斜拉杆,进行罕遇地震作用下的弹塑性时程分析,研究赘余斜拉杆发挥作用的不同条件以及斜拉杆的刚度取值范围。分析研究结果表明:对于基本周期T=0.6 s和T=0.8 s的建筑结构增设的赘余斜拉杆发挥作用的时间越早,赘余斜拉杆刚度越大对于限制最大相对位移的效果越好。
In order to improve the ability of anti-collapse of the structure under mega earthquake,this paper describes that add redundant oblique rod to the building structure increasing the degree of redundancy of structural force and seismic reserve capacity,improve the seismic capacity of the second line of defense,thus improving the ability of anti-collapse of structural system under mega earthquake.Building structure has added redundant oblique rod,in order to get elastic-plastic response of rare earthquake that creat a single-particle structure system to add redundant oblique rod,then do nonlinear time history analysis under the rare earthquake.Research redundant oblique rod play a role of different conditions and oblique rod stiffness range.Analysis results show that:for the basic cycle T=0.6 s and T= 0.8 s of the building structure add redundant oblique rod,the earlier play a role of oblique rod,the greater stiffness of oblique rod is,the bettter effect of limiting the maximum relative displacement is.
In order to improve the ability of anti-collapse of the structure under mega earthquake,this paper describes that add redundant oblique rod to the building structure increasing the degree of redundancy of structural force and seismic reserve capacity,improve the seismic capacity of the second line of defense,thus improving the ability of anti-collapse of structural system under mega earthquake.Building structure has added redundant oblique rod,in order to get elastic-plastic response of rare earthquake that creat a single-particle structure system to add redundant oblique rod,then do nonlinear time history analysis under the rare earthquake.Research redundant oblique rod play a role of different conditions and oblique rod stiffness range.Analysis results show that:for the basic cycle T=0.6 s and T= 0.8 s of the building structure add redundant oblique rod,the earlier play a role of oblique rod,the greater stiffness of oblique rod is,the bettter effect of limiting the maximum relative displacement is.
引文
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[2]叶列平,曲哲,陆新征,等.提高建筑结构抗地震倒塌能力的设计思想与方法[J].建筑结构学报,2008,29(4):42-50.
[3]陆新征,叶列平.基于IDA分析的结构抗地震倒塌能力研究[J].工程抗震与加固改造,2010,32(1):13-18.
[4]李爱群,高振世.工程结构抗震设计[M].北京:中国建筑工业出版社,2005.
[5]Nielsen N N,Imbeault F A.Validity of various hysteretic systems[C]//Proceedings of the 3 rd Japan National Conference onEarthquake Engineering.Tokyo:Yokohama,1971:707-714.
[6]石亦平,周玉蓉.ABAQUS有限元分析实例详解[M].北京:机械工业出版社,2006.
[7]ABAQUS Theory Manual.ABAQUS.Inc,2004.
[8]王亚勇,刘小弟,程民宪.建筑结构时程分析法输入地震波的研究[J].建筑结构学报,1991,12(2):51-60.
[9]邓军,唐家祥.时程分析法输入地震记录的选择与实例[J].工业建筑,2000(8):9-12.
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