钢筋混凝土Z形截面双向受剪柱抗震性能试验研究
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摘要
为研究钢筋混凝土Z形截面双向受剪柱的抗震性能,对4个缩尺比为1/2的试件进行拟静力试验,分析不同水平加载方向(加载角α分别取0°、45°、90°、135°)对其抗震性能的影响,研究Z形截面柱的破坏形态,得到试件的荷载-位移滞回曲线、骨架曲线、承载力、位移延性系数、刚度退化和耗能能力等力学性能指标。研究结果表明:试件在水平反复荷载作用下的破坏形态为弯剪破坏、弯曲破坏、剪切黏结破坏和剪切斜压破坏,其中剪切破坏的试件延性较差;双向水平荷载作用方向对Z形截面柱受剪承载力的影响近似符合椭圆规律,在加载角为45°时,试件的耗能能力最强,当加载角为0°和135°时,试件的耗能能力相差不大。提出钢筋混凝土Z形截面柱双向受剪承载力的计算方法,按该方法对本次试验和已有试验共22个试件进行计算,计算结果与试验值吻合较好。
In order to study the seismic performance of Z-shaped reinforced concrete columns subjected to biaxial shearing,quasi-static tests were carried out on four 1 /2 scale specimens.The effects of the horizontal loading directions(α = 0°,45°,90°,135°) were studied.And the failure characteristics,mechanical behaviors of Z-shaped columns were researched.The loading-displacement hysteretic loops and skeleton curves,load bearing capacity,displacement ductility,rigidity degradation and energy dissipation capacity were analyzed.Test results indicate four types of failure patterns can be seen from the test specimens,including shear-bending failure,bending failure,shearbond failure,shear compression failure,and the shear failure ductility is very poor.It shows that the influences of the lateral bevel loads on the shear strength of Z-shaped RC frame columns can be approximately described by ellipse law.The capacity of energy dissipation is maximized in the case of 45° loading angle,and the variation is small when the loading angles are 0° and 135°.A calculation method of Z-shaped reinforced concrete columns subjected to biaxial shear bearing capacity was proposed.According to the proposed method,totally 22 sets of test data from the tests presented in this paper and other previous tests were used for the calculation.The calculation results are in good agreement with test values.
In order to study the seismic performance of Z-shaped reinforced concrete columns subjected to biaxial shearing,quasi-static tests were carried out on four 1 /2 scale specimens.The effects of the horizontal loading directions(α = 0°,45°,90°,135°) were studied.And the failure characteristics,mechanical behaviors of Z-shaped columns were researched.The loading-displacement hysteretic loops and skeleton curves,load bearing capacity,displacement ductility,rigidity degradation and energy dissipation capacity were analyzed.Test results indicate four types of failure patterns can be seen from the test specimens,including shear-bending failure,bending failure,shearbond failure,shear compression failure,and the shear failure ductility is very poor.It shows that the influences of the lateral bevel loads on the shear strength of Z-shaped RC frame columns can be approximately described by ellipse law.The capacity of energy dissipation is maximized in the case of 45° loading angle,and the variation is small when the loading angles are 0° and 135°.A calculation method of Z-shaped reinforced concrete columns subjected to biaxial shear bearing capacity was proposed.According to the proposed method,totally 22 sets of test data from the tests presented in this paper and other previous tests were used for the calculation.The calculation results are in good agreement with test values.
引文
[1]天津大学.混凝土异形柱结构技术规程:征求意见稿[R].天津:天津大学,2012.
[2]康谷贻,巩长江.单调及低周反复荷载作用下异形截面框架柱的受剪性能[J].建筑结构学报,1997,18(5):22-31.(KANG Guyi,GONG Changjiang.Shearproperties of T-and L-shaped section frame columnsunder monotonic and horizontal low cyclic loadings[J].Journal of Building Structures,1997,18(5):22-31.(in Chinese))
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[6]李杰,吴建营,周德源,等.L形和Z形宽肢异形柱低周反复荷载试验研究[J].建筑结构学报,2002,23(1):9-15.(LI Jie,WU Jianying,ZHOU Deyuan,et al.Experimental research on wide flange speciallyshaped section columns subjected to cyclic loading[J].Journal of Building Structures,2002,23(1):9-15.(inChinese))
[7]曹万林,黄选明,田宝发,等.带暗柱Z形短柱抗震性能试验研究[J].世界地震工程,2003,19(2):45-49.(CAO Wanlin,HUANG Xuanming,TIAN Baofa,et al.Experiment and analysis of seismic behavior ofshort Z-shaped columns with concealed columns[J].World Earthquake Engineering,2003,19(2):45-49.(in Chinese))
[8]GB50010—2010混凝土结构设计规范[S].北京:中国建筑工业出版社,2011.(GB50010—2010Code for design of concrete structures[S].Beijing:China Architecture&Building Press,2011.(inChinese))
[9]GB/T50152—2012混凝土结构试验方法标准[S].北京:中国建筑工业出版社,2012.(GB/T50152—2012 Standard methods for testing of concretestructures[S].Beijing:China Architecture&BuildingPress,2012.(in Chinese))
[10]JGJ101—1996建筑抗震试验方法规程[S].北京:中国建筑工业出版社,1997.(JGJ101—1996Specification of test methods for earthquake resistantbuilding[S].Beijing:China Architecture&BuildingPress,1997.(in Chinese))
[11]崔钦淑,杨俊杰,康谷贻.钢筋混凝土Z形截面柱框架节点抗震性能试验研究[J].建筑结构学报,2012,33(6):86-95.(CUI Qinshu,YANG Junjie,KANGGuyi.Experimental research on seismic behavior of Z-shaped column joints in RC frame[J].Journal ofBuilding Structures,2012,33(6):86-95.(inChinese))
[12]王立军,王铁成,王崧.斜向水平荷载作用下钢筋混凝土框架柱受剪性能的试验研究[J].建筑结构学报,2006,27(4):96-102.(WANG Lijun,WANGTiecheng,WANG Song.Experimental study on shearbehavior of reinforced concrete frame column underbilateral horizontal loads[J].Journal of BuildingStructures,2006,27(4):96-102.(in Chinese))
[13]Hidetaka Umehara.Short rectangular RC columns underbilateral loadings[J].Journal of StructuralEngineering,ASCE,1984,110(3):605-608.
[14]王铁成.混凝土结构设计[M].北京:中国建筑工业出版社,2003:136-137.(WANG Tiecheng.Design ofconcrete structure[M].Beijing:China Architecture&Building Press,2003:136-137.(in Chinese))
[15]季青.低周反复水平荷载作用下Z形截面柱受剪性能试验研究与有限元非线性分析[D].杭州:浙江工业大学,2010:10-19.(JI Qing.The experimentalinvestigation and nonlinear finite element analysis of Z-shaped columns shearing performance subjected to low-cyclic horizontal load[D].Hangzhou:ZhejiangUniversity of Technology,2010:10-19.(in Chinese))
[16]毛晓飞.Z形截面柱抗剪承载力试验研究与有限元非线性分析[D].杭州:浙江工业大学,2008:11-18.(MAO Xiaofei.The experimental investigation andnonlinear finite element analysis of Z-shaped columnsshearing performance[D].Hangzhou:ZhejiangUniversity of Technology,2008:11-18.(in Chinese))
[17]洪炳钦.Z形截面柱抗剪性能的试验研究[D].杭州:浙江工业大学,2008:9-18.(HONG Bingqin.Theexperimental investigation of Z-shaped cross sectioncolumns shearing performance[D].Hangzhou:ZhejiangUniversity of Technology,2008:9-18.(in Chinese))
[18]崔钦淑,杨俊杰,王启文,等.钢筋混凝土Z形截面双向压弯柱抗震性能试验研究[J].建筑结构学报,2012,33(6):77-85.(CUI Qinshu,YANG Junjie,WANG Qiwen,et al.Experimental study on seismicbehavior of Z-shaped reinforced concrete columnssubjected to biaxial bending and axial compression[J].Journal of Building Structures,2012,33(6):77-85.(in Chinese))
[2]康谷贻,巩长江.单调及低周反复荷载作用下异形截面框架柱的受剪性能[J].建筑结构学报,1997,18(5):22-31.(KANG Guyi,GONG Changjiang.Shearproperties of T-and L-shaped section frame columnsunder monotonic and horizontal low cyclic loadings[J].Journal of Building Structures,1997,18(5):22-31.(in Chinese))
[3]徐向东,康谷贻,姚石良.单调及低周反复荷载作用下T形截面框架柱受剪性能的试验研究[J].建筑结构,1999,29(1):27-30.(Xu Xiangdong,Kang Guyi,Yao Shiliang.Experimental research on shearperformance of T-shaped section frame columns undermonotonic and horizontal low cyclic loadings[J].Building Structure,1999,29(1):27-30.(inChinese))
[4]巩长江,康谷贻,姚石良.L形截面钢筋混凝土框架柱受剪性能的试验研究[J].建筑结构,1999,29(1):31-34.(Gong Changjiang,Kang Guyi,Yao Shiliang.Experimental research on shear performance of L-shapedsection frame columns[J].Building Structure,1999,29(1):31-34.(in Chinese))
[5]王丹.钢筋混凝土框架异形柱设计理论研究[D].大连:大连理工大学,2002:115-124.(Wang Dan.Researches on design theory of RC special-shapedcolumns[D].Dalian:Dalian University of Technology,2002:115-124.(in Chinese))
[6]李杰,吴建营,周德源,等.L形和Z形宽肢异形柱低周反复荷载试验研究[J].建筑结构学报,2002,23(1):9-15.(LI Jie,WU Jianying,ZHOU Deyuan,et al.Experimental research on wide flange speciallyshaped section columns subjected to cyclic loading[J].Journal of Building Structures,2002,23(1):9-15.(inChinese))
[7]曹万林,黄选明,田宝发,等.带暗柱Z形短柱抗震性能试验研究[J].世界地震工程,2003,19(2):45-49.(CAO Wanlin,HUANG Xuanming,TIAN Baofa,et al.Experiment and analysis of seismic behavior ofshort Z-shaped columns with concealed columns[J].World Earthquake Engineering,2003,19(2):45-49.(in Chinese))
[8]GB50010—2010混凝土结构设计规范[S].北京:中国建筑工业出版社,2011.(GB50010—2010Code for design of concrete structures[S].Beijing:China Architecture&Building Press,2011.(inChinese))
[9]GB/T50152—2012混凝土结构试验方法标准[S].北京:中国建筑工业出版社,2012.(GB/T50152—2012 Standard methods for testing of concretestructures[S].Beijing:China Architecture&BuildingPress,2012.(in Chinese))
[10]JGJ101—1996建筑抗震试验方法规程[S].北京:中国建筑工业出版社,1997.(JGJ101—1996Specification of test methods for earthquake resistantbuilding[S].Beijing:China Architecture&BuildingPress,1997.(in Chinese))
[11]崔钦淑,杨俊杰,康谷贻.钢筋混凝土Z形截面柱框架节点抗震性能试验研究[J].建筑结构学报,2012,33(6):86-95.(CUI Qinshu,YANG Junjie,KANGGuyi.Experimental research on seismic behavior of Z-shaped column joints in RC frame[J].Journal ofBuilding Structures,2012,33(6):86-95.(inChinese))
[12]王立军,王铁成,王崧.斜向水平荷载作用下钢筋混凝土框架柱受剪性能的试验研究[J].建筑结构学报,2006,27(4):96-102.(WANG Lijun,WANGTiecheng,WANG Song.Experimental study on shearbehavior of reinforced concrete frame column underbilateral horizontal loads[J].Journal of BuildingStructures,2006,27(4):96-102.(in Chinese))
[13]Hidetaka Umehara.Short rectangular RC columns underbilateral loadings[J].Journal of StructuralEngineering,ASCE,1984,110(3):605-608.
[14]王铁成.混凝土结构设计[M].北京:中国建筑工业出版社,2003:136-137.(WANG Tiecheng.Design ofconcrete structure[M].Beijing:China Architecture&Building Press,2003:136-137.(in Chinese))
[15]季青.低周反复水平荷载作用下Z形截面柱受剪性能试验研究与有限元非线性分析[D].杭州:浙江工业大学,2010:10-19.(JI Qing.The experimentalinvestigation and nonlinear finite element analysis of Z-shaped columns shearing performance subjected to low-cyclic horizontal load[D].Hangzhou:ZhejiangUniversity of Technology,2010:10-19.(in Chinese))
[16]毛晓飞.Z形截面柱抗剪承载力试验研究与有限元非线性分析[D].杭州:浙江工业大学,2008:11-18.(MAO Xiaofei.The experimental investigation andnonlinear finite element analysis of Z-shaped columnsshearing performance[D].Hangzhou:ZhejiangUniversity of Technology,2008:11-18.(in Chinese))
[17]洪炳钦.Z形截面柱抗剪性能的试验研究[D].杭州:浙江工业大学,2008:9-18.(HONG Bingqin.Theexperimental investigation of Z-shaped cross sectioncolumns shearing performance[D].Hangzhou:ZhejiangUniversity of Technology,2008:9-18.(in Chinese))
[18]崔钦淑,杨俊杰,王启文,等.钢筋混凝土Z形截面双向压弯柱抗震性能试验研究[J].建筑结构学报,2012,33(6):77-85.(CUI Qinshu,YANG Junjie,WANG Qiwen,et al.Experimental study on seismicbehavior of Z-shaped reinforced concrete columnssubjected to biaxial bending and axial compression[J].Journal of Building Structures,2012,33(6):77-85.(in Chinese))
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