利用简易耗能装置提高填充墙耗能减震能力的数值模拟
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摘要
填充墙对框架结构抗震性能的影响具有两面性:一方面,填充墙的存在增加了结构的总刚度,提高了作用在结构上的地震力;另一方面,填充墙的存在又从某种程度上成为耗散地震能量的第一道防线。如何协调两者的能力,使填充墙的耗能能力更强一些,使填充墙成为协助框架结构耗能减震的辅助元件,是研究人员一直感兴趣的问题。针对砌体结构房屋抗震的需要,本文提出了在砌体墙片中增加交叉斜拉钢筋加固的方案。5.12地震发生后,根据进一步观察填充墙在地震中的表现,并对交叉斜拉筋加固砌体的方案做了改进,使其在保持造价低廉、安装方便的前提下,提高填充墙的抗倒塌和耗能能力。本文就这一体系进行了数值模拟分析,结果表明这种简易装置有助于提高填充墙体的耗能能力。
The influences of infilled walls on structural seismic capacity have dual characters,(1) infilled walls increase the rigid and earthquake force on structure;(2) on a certain degree,infilled walls become the first defendant line to consume seismic energy.Infilled walls become an auxiliary element for frame structure passive energy dissipation.It is always an important problem that coordinates the ability of them and strengthens the energy-dissipating capacity.The seismic of masonry structure has been researched and a method that using cross diagonal steel strengthen masonry structure has been proposed.Through further observation and thinking after 5.12 earthquake occurrence,the mean of cross diagonal steel is improved.Considering low cost and convenient installation,the ability of anti-collapse and dissipation of infilled walls can be advanced by this method.The numerical simulation is used to analysis this system,and the results show the device can improve energy-dissipating capacity of infilled wall.
The influences of infilled walls on structural seismic capacity have dual characters,(1) infilled walls increase the rigid and earthquake force on structure;(2) on a certain degree,infilled walls become the first defendant line to consume seismic energy.Infilled walls become an auxiliary element for frame structure passive energy dissipation.It is always an important problem that coordinates the ability of them and strengthens the energy-dissipating capacity.The seismic of masonry structure has been researched and a method that using cross diagonal steel strengthen masonry structure has been proposed.Through further observation and thinking after 5.12 earthquake occurrence,the mean of cross diagonal steel is improved.Considering low cost and convenient installation,the ability of anti-collapse and dissipation of infilled walls can be advanced by this method.The numerical simulation is used to analysis this system,and the results show the device can improve energy-dissipating capacity of infilled wall.
引文
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[2]李英民,韩军,刘立平.“5.12”汶川地震砌体结构房屋震害调查与分析[J].西安建筑科技大学学报,2009,41(5):606～611Li Ying-min,Han Jun,Liu Li-ping.Investigation andanalysis of masonry building damage caused by the 5.12 Wenchuan earthquake,Sichuan Province[J].Journalof Xi′an University of Architecture and Technology(Natural Science Edition),2009,41(5):606～611(inChinese)
[3]莫庸,金建民,杜永峰,曹宝恒.汶川大地震甘肃灾区房屋震害调查和震害分析[J].工程抗震与加固改造,2008,30(4),56～59Mo Yong,Jin Jian-min,Du Yong-feng,Cao Bao-heng.Thoughts on Survey of Seismic Damage and SeismicDesign of Frame Structure and Shear-wall FrameInteraction in Longnan Region during WenchuanEarthquake on May 12[J].Earthquake ResistantEngineering and Retrofitting,2008,30(4),56～59(inChinese)
[4]杜永峰,李慧.隔震建筑宏观性能的调研报告[R].甘肃省建设科技专家委员会应急评估报告,2008,5Du Yong-feng,Li Hui.Investigation report aboutmacroscopic properties of isolation building[R].Emergency evaluation report of constructingtechnological experts committee of Gansu province,May,2008(in Chinese)
[5]周云.金属耗能减震结构设计[M].武汉.武汉理工大学出版社,2006Zhou Yun.Sturcture Design of Metallic Damper[M].Wuhan:Press of Wuhan University of Technology,2006(in Chinese)
[6]GB50010-2002,混凝土结构设计规范[S]GB50010-2002,Concrete Structure Design Code[S](inChinese)
[7]施楚贤.砌体结构理论与设计[M].北京:中国建筑工业出版社,2003Shi Chu-xian.Theory and Design of Masonry Structure[M].Beijing:China Building Industry Press,2003(inChinese)
[8]王新敏.ANSYS工程结构数值分析[M].北京:人民交通出版社,2007Wang Xin-min.ANSYS Numerical Analysis ofEngineering Structure[M].Beijing:The People TrafficPress,2007(in Chinese)
[9]吕西林,金国芳,吴晓涵.钢筋混凝土结构非线性有限元理论与应用[M].上海:同济大学出版社,1999Lv Xi-lin,Jin Guo-fang,Wu Xiao-han.ReinforcedConcrete Structure Nonlinear Finite Element Theory andAnalysis[M].Shanghai:Tongji University Press,1999(in Chinese)
[10]杜永峰,寇佳亮,杨静成,闫力,赵方成.纤维砂浆加固多孔砖砌体墙片抗震性能试验研究[J].兰州理工大学学报,2009,35(3):107～110Du Yong-feng,Kou Jia-liang,Yang Jing-cheng,Yan Li,Zhao Fang-cheng.Experimental investigation ofaseismatic behavior of wall-body with perforated brickmasonry reinforced by cement mortar[J].Journal ofLanzhou University of Technology,2009,35(3):107～110(in Chinese)
[11]宋彧，周乐伟，原国华.砌体结构预应力斜拉筋加固抗震性能试验研究[J].兰州理工大学学报,2008,34(5):118～121Song Yu,Zhou Le-wei,Yuan Guo-hua.Experimentalinvestigation of aseismatic behavior of masonry envelopesstrengthened with prestressed diagonal bar[J].Journalof Lanzhou University of Technology,2008,34(5):118～121(in Chinese)
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