防屈曲耗能支撑钢管混凝土柱-钢梁组合框架子结构拟动力试验研究
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摘要
为研究防屈曲耗能支撑在组合框架结构中的减震效果,设计了1榀10层3跨防屈曲耗能支撑钢管混凝土柱-钢梁组合框架,利用网络化结构实验室NetSLab进行了1/3缩尺的子结构拟动力试验,分析楼层剪力、支撑剪力与层间位移之间的响应关系。结果表明:在多遇烈度地震作用下,主体框架与支撑均处于弹性工作状态;在基本烈度地震作用下,主体框架处于弹性工作状态,支撑开始屈服耗能;在罕遇烈度地震作用下,主体框架基本处于弹性工作状态,而支撑则出现明显的滞回耗能效果。由楼层位移时程曲线可知,结构底层层间位移比其他各层大很多,满足组合框架结构多道抗震设防的要求。
To investigate the seismic mitigation effect of buckling restrained brace(BRB) for composite frame structures,a ten-story and three-bay concrete filled steel tubular column-steel beam composite frame with BRBs was designed and substructure pseudo-dynamic test of its 1/3 scaled model was carried out with networked structural laboratory system(NetSLab).Based on the responses of story shear force,brace force,and inter-story drift,it can be learned that:under the frequent occurrence earthquake loading,both the main frame and BRBs are elastic;under the design basis earthquake loading,the main frame remains elastic and BRBs begin to yield for energy consumption;under the maximum considered earthquake loading,the main frame is still elastic and the BRBs perform with apparent hysteretic energy dissipation.From the time history curves of story displacement,the first story has a substantially larger drift,which indicates the frame meets the multi-level seismic design criteria simultaneously.
To investigate the seismic mitigation effect of buckling restrained brace(BRB) for composite frame structures,a ten-story and three-bay concrete filled steel tubular column-steel beam composite frame with BRBs was designed and substructure pseudo-dynamic test of its 1/3 scaled model was carried out with networked structural laboratory system(NetSLab).Based on the responses of story shear force,brace force,and inter-story drift,it can be learned that:under the frequent occurrence earthquake loading,both the main frame and BRBs are elastic;under the design basis earthquake loading,the main frame remains elastic and BRBs begin to yield for energy consumption;under the maximum considered earthquake loading,the main frame is still elastic and the BRBs perform with apparent hysteretic energy dissipation.From the time history curves of story displacement,the first story has a substantially larger drift,which indicates the frame meets the multi-level seismic design criteria simultaneously.
引文
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[3]Chen C C,Chen S Y,Liaw J J.Application of low yield strength steel on controlled plastification ductile concentrically braced frames[J].Canadian Journal of Civil Engineering,2001,28(5):823-836.
[4]Lignos D G,Hikino T,Matsuoka Y,et al.Collapse assessment of steel moment frames based on e-defense full-scale shake table collapse tests[J].Journal of Structural Engineering,ASCE,2013,139(1):120-132.
[5]He W H,Xiao Y,Guo Y R,et al.Pseudo-dynamic testing of hybrid frame with steel beams bolted to CFT columns[J].Journal of Constructional Steel Research,2013,88(9):123-133.
[6]范云蕾,郭玉荣,肖岩,等.多层框架结构远程协同拟动力试验研究[J].土木工程学报,2011,44(2):28-35.(FAN Yunlei,GUO Yurong,XIAO Yan,et al.Study on remote collaborative pseudo-dynamic tests of multi-story frames[J].China Civil Engineering Journal,2011,44(2):28-35.(in Chinese))
[7]Tsai K C,Weng Y T,Lin S L,et al.Pseudo-dynamic test of a full scale CFT/BRB frame:part 1:performance based specimen design[C]//Proceedings of the 13 th World Conference on Earthquake Engineering.Paper no.750.Vancouver,Canada;Pearso Prenti Hall,2004.
[8]肖岩,胡庆,郭玉荣,等.结构拟动力远程协同试验网络平台的开发研究[J].建筑结构学报,2005,26(3):122-129.(XIAO Yan,HU Qing,GUO Yurong,et al.A network platform for remote pseudo-dynamic testing[J].Journal of Building Structures,2005,26(3):122-129.(in Chinese))
[9]Chopra Anil K.Dynamics of sturctures[M].Upper Saddle River,New Jersey;Prentice-Hall Inc,1995:550-560.
[10]GB 50017—2003钢结构设计规范[S].北京:中国计划出版社,2003.(GB 50017—2003 Code for design of steel structure[S].Beijing:China Planning Press,2003.(in Chinese))
[11]GB 50011—2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.(GB 50011—2010 Code for seismic design of buildings[S].Beijing:Chinese Architectre&Building Press,2010.(in Chinese))
[12]肖岩,郭玉荣,范云蕾,等.结构远程协同试验原理、方法和应用[M].北京:科学出版社,2012:75-85.(XIAO Yan,GUO Yurong,FAN Yunlei,et al.Networked structural laboratories(NetSLab)principles,methods and applications[M].Beijing:Science Press,2012:75-85.(in Chinese))
[13]朱锦心.剪切模型弹塑性地震反应计算[J].地震工程与工程振动,1983,3(4):60-68.(ZHU Jinxin.Earthquake response calculation of elastic and plastic shear model[J].Earthquake Engineering and Engineering Vibration,1983,3(4):60-68.(in Chinese))
[14]王枝茂.带斜撑钢管混凝土柱-钢梁组合框架抗震性能研究[D].长沙:湖南大学,2011:56-66.(WANG Zhimao.Seismic behavior of concrete filled tubular column-steel beam composite frames with braces[D].Changsha:Hunan University,2011:56-66.(in Chinese))
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