静载下BRB与混凝土梁连接节点的有限元分析
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摘要
目的为了得到合理的节点形式,研究在静载下屈曲约束支撑与混凝土梁的连接节点性能.方法设计屈曲约束支撑与混凝土梁的两种连接节点,分别是栓钉连接式节点和型钢连接式节点,借助大型有限元分析软件ABAQUS对这两种节点在静载下的性能进行分析.结果两种形式节点的破坏原因都是由于节点板挤压部分的混凝土被压碎造成节点刚度变化,承载力急剧下降,节点破坏.两种形式节点的延性基本相同,均满足设计要求,但是型钢连接式的节点承载力约为栓钉连接式节点的1.16倍.结论两种形式节点受力均匀,传力明确,具有良好的性能,能够满足承载力的需要和延性的要求.
The purpose of this paper is to get rational joints,and do research the performance of joints between BRB and concrete beams under monotonic loading.The joint between BRB and concrete beam is designed in two forms,namely,stud-connected joint and steel-connected joint.Then finite element analysis of two joints under monotonic loading is made using software ABAQUS.The study shows that the decrease of the bearing capability and the destruction of joints under monotonic loading are due to the failure of the concrete in contact with the edge of the gusset plate.The displacement ductility of the two types of joints is basically the same and it is good enough to meet the requirements.But the bearing capability of the steel-connected joint is 1.16 times as the bearing capability of the stud-connected joint.Two joints force evenly,power transmission clear,and have good performance.Meanwhile,the displacement ductility and bearing capability of the two types of joints is good enough to meet the requirements.
The purpose of this paper is to get rational joints,and do research the performance of joints between BRB and concrete beams under monotonic loading.The joint between BRB and concrete beam is designed in two forms,namely,stud-connected joint and steel-connected joint.Then finite element analysis of two joints under monotonic loading is made using software ABAQUS.The study shows that the decrease of the bearing capability and the destruction of joints under monotonic loading are due to the failure of the concrete in contact with the edge of the gusset plate.The displacement ductility of the two types of joints is basically the same and it is good enough to meet the requirements.But the bearing capability of the steel-connected joint is 1.16 times as the bearing capability of the stud-connected joint.Two joints force evenly,power transmission clear,and have good performance.Meanwhile,the displacement ductility and bearing capability of the two types of joints is good enough to meet the requirements.
引文
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[2]Amir Z Fam,Sami H Rizkala.Confinement modelfor axially loaded concrete confined by circular FRPtubes[J].ACI Structure Journal,2001,98(4):451-461.
[3]Oguz C C,Michel B.Seismic behavior of bidirec-tional resistant ductile end diaphragms w ith bucklingrestrained braces in straight steel bridges[J].Engi-neering Structures,2009(31):380-393.
[4]Blake M A,Larry A F,Song Junho.Ductility capaci-ty models for buckling-restrained braces[J].Journalof Constructional Steel Research,2009(65):1712-1720.
[5]Christopher A,Larry A F.Evaluation of buckling re-strained braced frame seismic performance consider-ing reserve strength[J].Engineering Structures,2011(33):77-89.
[6]郝贵强,杜永山,齐建伟.防屈曲支撑(BRB)在抗震加固工程中的应用[J].建筑结构,2010(40):14-20.(Hao Guiqiang,Du Yongshan,Qi Jianwei.BRB inthe seismic retrofit engineering[J].Building Struc-ture,2010(40):14-20.)
[7]Chou C C,Chen P J.Compressive behavior of centralgusset plate connections for a buckling-restrainedbraced frame[J].Journal of Constructional Steel Re-search,2009(65):1138-1148.
[8]Ahmed E,Azizinamini A.Behavior and strength ofcircular concrete-filled tube columns[J].Journal ofConstruction Steel Research,2002,58:1041-1080.
[9]Behrouz Asgarian,Hamed Rahman Shokrgozar,Ma-soud Abitorabi.Effect of design loads in buckling re-strained braced frames performance[C].The 14thWorld Conference on Earthquake Engineering,Bei-jing:Institute of Engineering Mechanics,ChinaEarthquake Administration,2008.
[10]Bradly B C.Buckling-restrained braced frame con-nection design and testing[D].Brigham:BrighamYoung University,2007.
[11]于洁,陈玲俐.钢筋混凝土框架节点抗震性能研究进展[J].世界地震工程,2005,26(2):65-71.(Yu Jie,Chen Linli.Seismic performance of rein-forced concrete frame research[J].World Earth-quake Engineering,2005,26(2):65-71.)
[12]Gary S P.Effect of beam splicing on seismic re-sponse of buckling restrained braced frames[D].Brigham:Brigham Young University,2007.
[13]Ren C C,Ou J P,Jia J F.Fuzzy seismic damage as-sessment of steel frame structures w ith buckling re-strained braces under near-field ground motions[C].The 14th World Conference on Earthquake En-gineering,Beijing:Institute of engineering mechan-ics,China Earthquake Administration,2008.
[14]中华人民共和国建设部.GB50010—2002混凝土结构设计规范[S].北京:中国建筑工业出版社,2002.(Ministry of Construction of the people's Republicof China.GB50010—2002 Code for design of con-crete structures[S].Beijing:China Building IndustryPress,2002.)
[15]中华人民共和国建设部.GB50017-2003钢结构设计规范[S].北京:中国计划出版社,2003.(Ministry of Construction of the people's Republicof China.GB50010-2003 Code for design of steelstructures[S].Beijing:China Planning Press,2003.)
[16]李天.组合结构设计原理[M].郑州:郑州大学出版社,2010.(Li Tian.Design principle of composite structure[M].Zhengzhou:Zhengzhou University Press,2010.)
[17]姜杰.钢管煤矸石混凝土梁柱节点在低周往复荷载作用下的有限元分析[D].沈阳:沈阳建筑大学,2010.(Jiang Jie.The finite element analysis of gangueconcrete beam-column node on low cycle reciproca-ting load[D].Shenyang:Shenyang Jianzhu Univer-sity,2010.)
[18]王文达,韩林海,游经团.方钢管混凝土柱-钢梁外加强环节点滞回性能的实验研究[J].土木工程学报,2006,9:56-66.(Wang Wenda,Han Linhan,You Jingtuan.The ex-perimental study of the hysteretic behavior of CFRTcolumn-steel beam node[J].Journal of Civil Engi-neering,2006,9:56-66.)
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