钢筋混凝土柱低周反复荷载试验加载方法的比较研究
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摘要
为了研究加载方法对钢筋混凝土柱低周反复荷载试验结果的影响,在分析半柱试验中柱端约束对试验结果影响的基础上,设计并制作了一个全柱试件和两个半柱试件,进行了低周反复荷载试验。一个半柱试件采用传统方法加载,竖向荷载通过球铰施加于柱顶;另一个半柱试件通过特制的销铰加载装置使竖向荷载和水平荷载的作用点交汇于销铰转动轴。通过比较全柱试件和半柱试件的滞回曲线、骨架曲线、极限荷载和变形值、累计耗能量发现,当采用销铰加载时,其试验结果与整柱基本相符;而采用传统加载方法时,由于柱端约束的存在,其承载能力明显偏大。因此,建议在半柱试件的低周反复荷载试验中采用销铰施加荷载以便合理模拟全柱柱中的反弯点。
To investigate effects of loading methods on results of low cycle cyclic loading test for reinforced concrete columns,the current loading methods used in low cycle cyclic loading tests were compared and the influence of end constraint on test results of half-column specimens was analyzed.Low cycle cyclic loading tests were conducted on a full-column specimen and two half-column specimens with the same dimensions and reinforcement.One of the half columns was loaded by the traditional method in which the vertical load was applied on the top of the column through a sphere hinge,and the other was loaded with a well-designed pin-hinge device.By comparing hysteretic loops,envelope curves,ultimate load and displacement,and accumulated dissipated energy of the half columns with those of the full column,it was found that the test results of the half-column specimen loaded with a pin-hinge device agree well with those of the full column,while the tested ultimate load of the other half column is 33% larger than that of the full-column specimen due to the constraint at the top of the column.The pin-hinge loading device is therefore suggested to be used in low cycle cyclic loading test for half-column specimens.
To investigate effects of loading methods on results of low cycle cyclic loading test for reinforced concrete columns,the current loading methods used in low cycle cyclic loading tests were compared and the influence of end constraint on test results of half-column specimens was analyzed.Low cycle cyclic loading tests were conducted on a full-column specimen and two half-column specimens with the same dimensions and reinforcement.One of the half columns was loaded by the traditional method in which the vertical load was applied on the top of the column through a sphere hinge,and the other was loaded with a well-designed pin-hinge device.By comparing hysteretic loops,envelope curves,ultimate load and displacement,and accumulated dissipated energy of the half columns with those of the full column,it was found that the test results of the half-column specimen loaded with a pin-hinge device agree well with those of the full column,while the tested ultimate load of the other half column is 33% larger than that of the full-column specimen due to the constraint at the top of the column.The pin-hinge loading device is therefore suggested to be used in low cycle cyclic loading test for half-column specimens.
引文
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[15]杜宏彪.双向压弯钢筋混凝土柱的抗震性能[J].哈尔滨建筑大学学报,1999,32(4):47-52.Du HB.The seismic behavior of bi-directionalcompression-flexure reinforced concrete columns[J].Journal of Harbin University of C.E.&Architecture,1999,32(4):47-52.(in Chinese)
[16]颜桂云,孙炳楠,王泽军,等.锈蚀钢筋混凝土压弯构件抗震性能的试验研究[J].建筑结构,2003,33(2):6-18,50.Yan G Y,Sun B N,Wang Z J,et al.ExperimentalResearch on Seismic Behavior of the Corroded RCMembers with Bending and Compression Loads[J].Building Structure,2003,33(2):6-18,50.(inChinese)
[17]杨婧.半组合结构压弯构件的滞回性能研究[D].上海:同济大学,2005.Yang J.Research on the hysteretic performance ofpartially encased composite structures subjected tocombined compression and bending members[D].Shanghai:Tongji University,2005.(in Chinese)
[2]李英民,刘建伟,郑清,等.高剪压比钢筋混凝土框架夹心节点抗震性能研究[J].重庆大学学报,2007,29(4):44-48,94.Li Y M,Liu J W,Zheng Q,et al.Seismic load tests onreinforced concrete beam-column sandwich joints withhigh shear stress[J].Journal of Chongqing JianzhuUniversity,2007,29(4):44-48,94.(in Chinese)
[3]Li J B,Gong J X,Wang L C.Seismic behavior ofcorrosion-damaged reinforced concrete columnsstrengthened using combined carbon fiber-reinforcedpolymer and steel jacket[J].Construction andBuilding Materials,2009,23:2653-2663.
[4]刘伯权,白绍良,徐云中,等.钢筋混凝土柱低周疲劳性能的试验研究[J].地震工程与工程振动,1998,18(4):82-89.Liu B Q,Bai S L,Xu Y Z,et al.Experimental study oflow-cyclic behavior of concrete columns[J].Earthquake Engineering and Engineering Vibration,1998,18(4):82-89.(in Chinese)
[5]贡金鑫,仲伟秋,赵国藩.受腐蚀钢筋混凝土偏心受压构件低周反复性能的试验研究[J].建筑结构学报,2004,25(5):92-97,104.Gong J X,Zhong W Q,Zhao G F.Experimental studyon low-cycle behavior of corroded reinforced concretemember under eccentric compression[J].Journal ofBuilding Structures,2004,25(5):92-97,104.(inChinese)
[6]周颖,吕西林.空腹式劲性钢筋混凝土柱的恢复力模型研究[J].结构工程师,2004,20(6):59-65,24.Zhou Y,Lv X L.Study on restoring force model ofLattice type steel reinforced concete columns[J].Structural Engineers,2004,20(6):59-65,24.(inChinese)
[7]成文山,邹银生,程翔云.钢筋混凝土压弯构件恢复力特性的研究[J].湖南大学学报,1983,10(3):13-22.Cheng W S,Zou Y S,Cheng X Y.Research on thecharacteristics of restoring force for reinforced concretemembers with flexure and axial force[J].Journal ofHunan University,1983,10(3):13-22.(in Chinese)[8]唐兴荣,刘伟庆,钱奕技.空间纲构架混凝土柱抗震性能的试验研究[J].建筑结构学报,2004,25(5):22-28.Tang X R,Liu W Y,Qian Y Z.Experimental researchon seismic hehavior of concrete column with spatialsteel frame subjected to low cyclic revised load[J].Journal of Building Structures,2004,25(5):22-28.(in Chinese)
[9]刘金升,苏小卒,赵勇.配500 MPa细晶钢筋混凝土柱低周反复荷载试验[J].结构工程师,2009,25
(3):135-140.Liu J S,Su X Z,Zhao Y.Experiment on concretecolumns reinforced with 500 MPa fine-grained rebarunder low cycle reversed loading[J].StructuralEngineers,2009,25(3):135-140.(in Chinese)[10]牛荻涛,陈新孝,王学民.锈蚀钢筋混凝土压弯构件抗震性能试验研究[J].建筑结构,2004,34
(10):36-38,41.Niu D T,Chen X X,Wang X M.Experimental Studyon Seismic Performance of Corroded ReinforcedConcrete Members with Flexure and Compression[J].Building Structure,2004,34(10):36-38,41.(inChinese)
[11]李俊华,赵鸿铁,薛建阳.型钢高强混凝土柱延性的试验研究[J].西安建筑科技大学学报(自然科学版),2004,34(4):383-386,420.Li J H,Zhao HT,Xue J Y.Experimental study of theductility of SRHC concrete columns[J].J Xi’an Univof Arch&Tech(Natural Science Edition),2004,34(4):383-386,420.(in Chinese)
[12]卢亦焱,陈少雄,赵国藩.外包钢与碳纤维复合加固钢筋混凝土柱抗震性能的试验研究[J].土木工程学报,2005,38(8):10-17.Lu Y Y,Chen S X,Zhao G F.An experimental studyon the seismic behavior of reinforced concrete columnstrengthened with bonded steel hoops and carbon fiberreinforced polymer sheet[J].China Civil EngineeringJournal,2005,38(8):10-17.(in Chinese)
[13]郭子雄,刘阳,黄秋来.高轴压比核心型钢混凝土柱抗震性能试验研究[J].哈尔滨工业大学学报,2007,39(8):167-171.Guo Z X,Liu Y,Huang Q L.Experimental study onseismic behavior of core steel reinforced concretecolumns[J].Journal of Harbin Institute ofTechnology,2007,39(8):167-171.(in Chinese)
[14]张国军,刘伯权,白国良.钢筋混凝土框架柱在高轴压比下的抗震性能试验[J].长安大学学报(自然科学版),2002,22(6):53-57.Zhang G J,Liu B Q,Bai G L.Experimental study onaseismic behavior of RC frame columns with high axialcompression ratio[J].Journal of Chang’an University(Natural Science Edition),2002,22(6):53-57.(inChinese)
[15]杜宏彪.双向压弯钢筋混凝土柱的抗震性能[J].哈尔滨建筑大学学报,1999,32(4):47-52.Du HB.The seismic behavior of bi-directionalcompression-flexure reinforced concrete columns[J].Journal of Harbin University of C.E.&Architecture,1999,32(4):47-52.(in Chinese)
[16]颜桂云,孙炳楠,王泽军,等.锈蚀钢筋混凝土压弯构件抗震性能的试验研究[J].建筑结构,2003,33(2):6-18,50.Yan G Y,Sun B N,Wang Z J,et al.ExperimentalResearch on Seismic Behavior of the Corroded RCMembers with Bending and Compression Loads[J].Building Structure,2003,33(2):6-18,50.(inChinese)
[17]杨婧.半组合结构压弯构件的滞回性能研究[D].上海:同济大学,2005.Yang J.Research on the hysteretic performance ofpartially encased composite structures subjected tocombined compression and bending members[D].Shanghai:Tongji University,2005.(in Chinese)
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