压弯剪扭钢筋混凝土十形柱抗震性能试验研究
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摘要
为研究压弯剪扭复合受力钢筋混凝土十形柱的抗震性能,以扭弯比、轴压比为变化参数,设计6个钢筋混凝土十形柱试件进行恒定轴力反复弯剪扭的加载试验,观察试件的破坏过程和形态,获取扭矩-扭转角滞回曲线和荷载-位移滞回曲线以及试件的开裂、屈服、峰值和破坏等特征点参数。基于试验数据,详细分析了压弯剪扭复合受力该类柱的极限承载力、位移延性、层间侧移角、能量耗散、强度及刚度退化等抗震性能指标。结果表明:在扭弯比小于0.21且轴压比小于0.34范围时,低周反复压弯剪扭钢筋混凝土十形柱的破坏形态表现为弯扭和扭剪破坏,滞回曲线呈捏拢状的S形,位移延性系数超过3.0,开裂时的侧移角大于1/550,破坏时的侧移角大于1/40,能满足我国建筑抗震设计规范要求;扭矩的存在使得材料的损伤更严重,耗能更大。
To reveal the seismic behavior of reinforced concrete cross shape columns under compressionflexure-shear-torsion combined actions, the torsion-bending ratio and axial compression level were considered as parameters in an experiment, and six specimens of reinforced concrete cross shape columns were designed for reversed cyclic flexure-shear-torsion loading test with constant compression. The failure process and failure pattern were observed, the hysteretic curves of torque-torsion angle and loading-displacement as well as the characteristic results of the cracking, yielding, peak and failure points were obtained. Based on the test data, the seismic indexes of the specimens, such as the bearing capacity, ductility, drift angle, energy dissipation, strength and stiffness degradation, were analyzed deeply. The research results show that when the torsion-bending ratio is less than 0.21 and the axial compression level is less than 0.34, the failure pattern of the specimens are of a bending-torsion or torsion-shear failure mode. The hysteretic curves are of an "S" shape and pinch obviously. The ductility coefficients are larger than 3.0, the crack point drift angles are larger than 1/550, and the failure point drift angles are larger than 1/40. All of them can meet the needs of the Chinese code for seismic design of buildings. The presence of the torque makes the material damage more serious and improves the energy dissipation capacity of the specimens.
To reveal the seismic behavior of reinforced concrete cross shape columns under compressionflexure-shear-torsion combined actions, the torsion-bending ratio and axial compression level were considered as parameters in an experiment, and six specimens of reinforced concrete cross shape columns were designed for reversed cyclic flexure-shear-torsion loading test with constant compression. The failure process and failure pattern were observed, the hysteretic curves of torque-torsion angle and loading-displacement as well as the characteristic results of the cracking, yielding, peak and failure points were obtained. Based on the test data, the seismic indexes of the specimens, such as the bearing capacity, ductility, drift angle, energy dissipation, strength and stiffness degradation, were analyzed deeply. The research results show that when the torsion-bending ratio is less than 0.21 and the axial compression level is less than 0.34, the failure pattern of the specimens are of a bending-torsion or torsion-shear failure mode. The hysteretic curves are of an "S" shape and pinch obviously. The ductility coefficients are larger than 3.0, the crack point drift angles are larger than 1/550, and the failure point drift angles are larger than 1/40. All of them can meet the needs of the Chinese code for seismic design of buildings. The presence of the torque makes the material damage more serious and improves the energy dissipation capacity of the specimens.
引文
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[14]吴波,徐玉野.高温下钢筋混凝土异形柱的试验研究[J].建筑结构学报, 2007, 28(5):24-31.WuBo,XuYuye.Experimentalstudyonreinforced concretecolumnswithspecialshapedcrosssection subjectedtohightemperature[J].JournalofBuilding Structures, 2007, 28(5):24-31.(in Chinese)
[15]赵艳静,李忠献,陈云霞.四级抗震等级时钢筋混凝土异形柱轴压比限值的研究[J].建筑结构学报,2004,25(3):58-62.Zhao Yanjing, Li Xianzhong, Chen Yunxia. Research on limitvaluesofaxialcompressionratiosofspecially shapedRCcolumnsincaseof4thaseismicgrade[J].JournalofBuildingStructures,2004,25(3):58-62.(in Chinese)
[16]管仲国,黄承逵,王丹,等.钢筋混凝土异形柱双向偏心承载力高效算法与程序设计[J].工程力学,2006,23(4):134-139.GuanZhongguo,HuangChengkui,WangDan,etal.Highlyefficientalgorithmforcalculatingload-bearing capacityofspecial-shapedRCcolumnsunderaxial compressionandbiaxialbending[J].Engineering Mechanics, 2006, 23(4):134-139.(in Chinese)
[17]徐玉野,邱政和,何叶,等.压扭作用下混凝土异形柱的抗扭性能[J].中南大学学报(自然科学版),2012,43(10):4029-4037.Xu Yuye, Qiu Zhenghe, He Ye, et al. Torsion behavior of reinforcedconcretespecial-shapedcolumnsunder pressureandtorque[J].JournalofCentralSouth University(ScienceAndTechnology),2012,43(10):4029-4037.(in Chinese)
[18]徐玉野,何叶,王全凤.压弯剪扭作用下异形柱的抗扭性能研究[J].工程力学, 2014, 31(6):101-109.Xu Yuye, He Ye, Wang Quanfeng. Study on the torsion performancesofconcretespeciallyshapedcolumns undertheactionsofcompression,bending,shearand torsion[J].EngineeringMechanics,2014,31(6):101-109.(in Chinese)
[19]李光星,蔡健,王霖,等.钢筋混凝土平板-异形柱板柱节点抗扭构件刚度研究[J].工业建筑,2007,37(3):33-37.Li Guangxing, Cai Jian, Wang Lin, et al. Study on rigidity oftransversetorsionmemberofreinforcedconcreteflat plate-special-shapedcolumnconnection[J].Industrial Construction, 2007, 37(3):33-37.(in Chinese)
[20]聂建国,王宇航,樊健生.钢管混凝土柱轴压力-弯矩-扭矩空间复合受力拟静力试验研究[J].建筑结构学报,2012, 33(9):1-11.Nie Jianguo, Wang Yuhang, Fan Jiansheng. Experimental studyonconcretefilledsteeltubularcolumnsunder combinedcompression,flexureandtorsion[J].Journal of Building Structures, 2012, 33(9):1-11.(in Chinese)
[21]GB50011-2010,建筑抗震设计规范[S].北京:中国建筑工业出版社, 2010.GB50011-2010,Codeforseismicdesignofbuildings[S].Beijing:ChinaArchitectureandBuildingPress,2010.(in Chinese)
[2]王铁成,郝贵强,赵龙海,等.反负荷载作用下纤维增强异形柱的抗震性能试验[J].天津大学学报,2010,43(11); 957-963.Wang Tiecheng, Hao Guiqiang, Zhao Hailong, et al. Test onseismicbehaviorofspecial-shapedcolumns reinforcedbyfiberundercyclicloading[J].Journalof Tianjin University, 2010, 43(11):957-963.(in Chinese)
[3]陈宗平,徐金俊,薛建阳.型钢混凝土异形柱-钢梁空间边节点的抗震性能及影响因素分析[J].工程力学,2015, 32(2):105-113.ChenZongping,XuJinjun,XueJianyang.Seismic behaviorandinfluencefactoranalysison3Dsidejoins composedofsteelreinforcedconcretespecial-shaped columnsandsteelbeams[J].Engineeringmechanics,2015, 32(2):105-113.(in Chinese)
[4]赵嘉康,张连德,卫云亭.钢筋混凝土压弯剪扭构件的抗扭强度研究[J].土木工程学报, 1993, 26(1):20-30.ZhaoJiakang,ZhangLiande,WeiYunting.Torsional strengthofRCmemberssubjectedtocompression,bending,shear and torsion[J]. China Civil Engineering,1993, 26(1):20-30.(in Chinese)
[5]王东方,秦卫红.钢筋混凝土压弯剪扭构件的扭转刚度[J].同济大学学报, 2004, 32(2):167-171.WangDongfang,QinWeihong.Torsionstiffnessof reinforcedconcretecompression-flexure-shear-torsion components[J].JournalofTongjiUniversity,2004,32(2):167-171.(in Chinese)
[6]林咏梅,周小真,张连德.钢筋混凝土双向压弯剪构件在单调扭矩作用下抗扭性能的研究[J].建筑结构学报,1996, 17(1):29-39.LinYongmei,ZhouXiaozhen,ZhangLiande.Studyon torsionalbehaviorofRCmemberssubjectedtobiaxial eccentriccompression,biaxialshearandmonotonic torsion[J].JournalofBuildingStructures,1996,17(1):29-39.(in Chinese)
[7]刘继明,李家富,门进杰.角柱在压弯剪扭复合受力下的延性[J].工业建筑, 2004, 34(4):46-48.Liu Jiming, Li Jiafu, Men Jinjie. Ductility of corner post under compression, bending, shear and torsion action[J].IndustrialConstruction,2004,34(4):46-48.(in Chinese)
[8]门进杰,史庆轩,刘继明,等.高强钢筋混凝土复合受扭构件开裂性能试验研究[J].西安建筑科技大学学报(自然科学版), 2007, 39(2):193-198.MenJinjie,ShiQingxuan,LiuJiming,etal.Strainof steelreinforcementandultimatetorqueontorsional behaviorsofhigh-strengthreinforcedconcretemembers subjectedtocombinedtorsion[J].JournalofXi’an UniversityofArchitecture&Technology(Natural Science Edition), 2007, 39(2):193-198.(in Chinese)
[9]Navarro Gregori J, Miguel Sosa P, Fernández Prada M A,etal.A3Dnumericalmodelforreinforcedand prestressedconcreteelementssubjectedtocombined axial, bending, shear and torsion loading[J]. Engineering Structures, 2007, 29(2):3404-3419.
[10]WangP,HanQ,DuX.Seismicperformanceofcircular RCbridgecolumnswithflexure-torsioninteraction[J].Soil Dynamics&Earthquake Engineering, 2014, 66(66):13-30.
[11]LiQ,BelarbiA.SeismicbehaviorofRCcolumnswith interlockingspiralsundercombinedloadingsincluding torsion[J].ProcediaEngineering,2011,14(3):1281-1291.
[12]戎贤,张健新,李艳艳.钢筋混凝土异形柱空间框架抗倒塌试验研究[J].工程力学, 2016, 33(10):189-196.RongXian,ZhangJianxin,LiYanyan,etal.Experimental research on collapse resistance of RC space framewithspeciallyshapedcolumns[J].Engineering mechanics, 2016, 33(10):189-196.(in Chinese)
[13]戎贤,张健新,李艳艳.往复荷载作用下异形柱节点抗震性能改善措施[J].工程力学, 2015, 32(08):58-65.RongXian,ZhangJianxin,LiYanyan.Improvement measureonaseismicbehaviorofspeciallyshaped columnjoinsundercycleloading[J].Engineering mechanics, 2015, 32(08):58-65.(in Chinese)
[14]吴波,徐玉野.高温下钢筋混凝土异形柱的试验研究[J].建筑结构学报, 2007, 28(5):24-31.WuBo,XuYuye.Experimentalstudyonreinforced concretecolumnswithspecialshapedcrosssection subjectedtohightemperature[J].JournalofBuilding Structures, 2007, 28(5):24-31.(in Chinese)
[15]赵艳静,李忠献,陈云霞.四级抗震等级时钢筋混凝土异形柱轴压比限值的研究[J].建筑结构学报,2004,25(3):58-62.Zhao Yanjing, Li Xianzhong, Chen Yunxia. Research on limitvaluesofaxialcompressionratiosofspecially shapedRCcolumnsincaseof4thaseismicgrade[J].JournalofBuildingStructures,2004,25(3):58-62.(in Chinese)
[16]管仲国,黄承逵,王丹,等.钢筋混凝土异形柱双向偏心承载力高效算法与程序设计[J].工程力学,2006,23(4):134-139.GuanZhongguo,HuangChengkui,WangDan,etal.Highlyefficientalgorithmforcalculatingload-bearing capacityofspecial-shapedRCcolumnsunderaxial compressionandbiaxialbending[J].Engineering Mechanics, 2006, 23(4):134-139.(in Chinese)
[17]徐玉野,邱政和,何叶,等.压扭作用下混凝土异形柱的抗扭性能[J].中南大学学报(自然科学版),2012,43(10):4029-4037.Xu Yuye, Qiu Zhenghe, He Ye, et al. Torsion behavior of reinforcedconcretespecial-shapedcolumnsunder pressureandtorque[J].JournalofCentralSouth University(ScienceAndTechnology),2012,43(10):4029-4037.(in Chinese)
[18]徐玉野,何叶,王全凤.压弯剪扭作用下异形柱的抗扭性能研究[J].工程力学, 2014, 31(6):101-109.Xu Yuye, He Ye, Wang Quanfeng. Study on the torsion performancesofconcretespeciallyshapedcolumns undertheactionsofcompression,bending,shearand torsion[J].EngineeringMechanics,2014,31(6):101-109.(in Chinese)
[19]李光星,蔡健,王霖,等.钢筋混凝土平板-异形柱板柱节点抗扭构件刚度研究[J].工业建筑,2007,37(3):33-37.Li Guangxing, Cai Jian, Wang Lin, et al. Study on rigidity oftransversetorsionmemberofreinforcedconcreteflat plate-special-shapedcolumnconnection[J].Industrial Construction, 2007, 37(3):33-37.(in Chinese)
[20]聂建国,王宇航,樊健生.钢管混凝土柱轴压力-弯矩-扭矩空间复合受力拟静力试验研究[J].建筑结构学报,2012, 33(9):1-11.Nie Jianguo, Wang Yuhang, Fan Jiansheng. Experimental studyonconcretefilledsteeltubularcolumnsunder combinedcompression,flexureandtorsion[J].Journal of Building Structures, 2012, 33(9):1-11.(in Chinese)
[21]GB50011-2010,建筑抗震设计规范[S].北京:中国建筑工业出版社, 2010.GB50011-2010,Codeforseismicdesignofbuildings[S].Beijing:ChinaArchitectureandBuildingPress,2010.(in Chinese)