翼墙-框架结构振动台试验研究及有限元分析
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摘要
为研究翼墙-框架结构在地震作用下的抗震性能和加固效果,进行了一个缩尺比为1∶4的翼墙-框架结构模型振动台试验,得到了结构在烈度为7度的多遇、设防和罕遇地震以及8度、9度地震动作用下的动力特性、动力反应和宏观破坏模式。研究表明:翼墙根部首先受到往复拉压破坏,框架柱得到有效保护,实现了多道抗震防线的目的;梁端出现大量裂缝,基本实现了"强柱弱梁"屈服机制,而纯框架数值模型则呈现典型的柱铰破坏机制;纯框架模型的底层层间位移角显著大于上部各楼层,翼墙-框架模型各楼层的层间位移角大小基本一致,层屈服机制得到有效避免。
Shaking table test of a 1∶ 4 scaled wing wall-frame model was conducted to study the seismic behavior and strengthening effect of this structural system. The dynamic characteristics,seismic responses and failure mechanism of the test model under a series of excitations with gradually increasing acceleration amplitudes are presented in this paper. The research shows that wing walls damage first due to repeated tension and compression so that columns are protected effectively,indicating multiple seismic fortification levels. A large amount of cracks occur at the end of beams,the ‘strong column-weak'beam mechanism is basically realized. On the contrary,column hinges mechanism happens in the numerical model of an ordinary RC frame. The inter-story drift ratio of the bottom story is obviously larger than that of the upper stories in the ordinary RC frame,while the value of inter-story drift ratio is basically the same among the stories in the wing wall-frame. The story yield mechanism is avoided.
引文
[1]叶列平,陆新征,赵世春,李易.框架结构抗地震倒塌能力的研究:汶川地震极震区几个框架结构震害案例分析[J].建筑结构学报,2009,30(6):67-76.(YE Lieping,LU Xinzheng,ZHAO Shichun,LI Yi.Seismic collapse resistance of RC frame structures:case studies on seismic damages of several RC frame structures under extreme ground motion in Wenchuan Earthquake[J].Journal of Building Structures,2009,30(6):67-76.(in Chinese))
    [2]许卫晓.阶梯墙框架结构抗震性能及设计方法研究[D].哈尔滨:中国地震局,2014.(XU Weixiao.Study on the seismic performance and design of stepped wall-frame structure[D].Harbin:CEA,2014.(in Chinese))
    [3]国明超,栾曙光,鞠杨,等.钢筋混凝土带翼墙短柱抗震性能研究[J].建筑结构学报,1996,17(3):32-42.(GUO Mingchao,LUAN Shuguang,JU Yang,et al.Study on seismic behavior of reinforced concrete short column with wing wall[J].Journal of Building Structures,1996,17(3):32-42.(in Chinese))
    [4]张绍武,魏闯,陈涛,等.增设翼墙加固钢筋混凝土柱受力性能分析[J].工程改造与加固,2013,35(4):131-135.(ZHANG Shaowu,WEI Chuang,CHEN Tao,et al.The mechanics behavior analysis of the strengthening reinforced concrete column with wing wall[J].Earthquake Resistant Engineering and Retrofitting,2013,35(4):131-135.(in Chinese))
    [5]Klatakci M Y,Yavuz G.An experimental study on strengthening of vulnerable RC frames with RC wing walls[J].Structural Engineering and Mechanics,2012,41(6):691-710.
    [6]黄思凝,郭迅,张敏政,等.钢筋混凝土结构小比例尺模型设计方法及相似性研究[J].土木工程学报,2012,45(7):31-38.(HUANG Sining,GUO Xun,ZHANG Minzheng,et al.Study of design method and similitude for small-scale reinforced concrete structural models[J].China Civil Engineering Journal,2012,45(7):31-38.(in Chinese))
    [7]赵作周,管桦,钱稼茹.欠人工质量缩尺振动台试验结构模型设计方法[J].建筑结构学报,2010,31(7):78-85.(ZHAO Zuozhou,GUAN Hua,QIAN Jiaru.Design method of small scaled shaking table test structural model laking artificial mass[J].Journal of Building Structures,2010,31(7):78-85.(in Chinese))
    [8]张敏政.地震模拟实验中相似律应用的若干问题[J].地震工程与工程振动,1997,17(2):52-58.(ZHANG Minzheng.Study on similitude laws for shaking tabel tests[J].Journal of Earthquake Engineering and Engineering Vibration,1997,17(2):52-58.(in Chinese))
    [9]Park Y J,Reinborn A M,Kunnath S K.IDARC:inelastic damage analysis of reinforced concrete frameshear-wall structures[R].Technical report NCEER-87-0008.Buffalo:State University of New York at Buffalo,1987.
    [10]Valles R E,Reinborn A M,Kunnath S K,Li C,Madan A.IDARC 2D version 4.0:a program for the inelastic damage analysis of buildings[R].Technical report NCEER-96-0010.Buffalo:State University of New York at Buffalo,1996.

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