实腹式型钢混凝土十形与L形截面柱抗震性能试验及有限元分析
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摘要
采用"建研式"加载装置对实腹式型钢混凝土十形、L形截面柱各3个试件进行了低周反复加载试验。考虑了配钢率和轴压比的影响,观察了试件的受力过程,分析了破坏形态及荷载-位移滞回曲线和骨架曲线、延性、承载力、刚度、耗能能力等抗震性能指标。基于此,采用ABAQUS并调用纤维模型子程序PQ-Fiber对试验进行有限元模拟,模拟结果与试验结果吻合较好,进而对实腹式型钢混凝土十形和L形截面柱在不同加载角度下的受力性能和轴压比限值进行了分析。结果表明:剪跨比为2.5的实腹式型钢混凝土十形和L形截面柱均呈弯曲型破坏;试件的滞回曲线对称、饱满,延性好,承载力稳定,耗能能力强;十形截面柱沿45°加载时延性最差,沿0°加载时承载力最低; L形截面柱沿45°加载时延性最差,承载力最低。型钢混凝土十形截面柱和L形截面柱二级抗震等级对应的轴压比限值建议分别取0.65和0.45,一级和三级抗震等级时分别减小和增加0.1。
Three solid-web steel reinforced concrete cross-shaped column specimens and three L-shaped column specimens were tested under low cyclic reversed loading using the Kenken-style(PCE) loading device,considering the influence of steel ratio and axial compression ratio.The failure process was observed.The failure patterns and seismic behaviors,such as the load-displacement hysteretic loops and skeleton curves,ductility,strength,stiffness and energy dissipation capacity,were analyzed.Based on the experimental study,finite element analysis(FEA) was carried out using ABAQUS and a subroutine named PQ-Fiber.The FEA results agree well with the experimental results.The influence of loading directions and the limit of axial compression ratio of solid-web steel reinforced concrete cross-shaped columns and L-shaped columns were analyzed.The research results show that the failure pattern of all specimens with a shear span ratio of 2.5 is flexural failure.The hysteretic loops are symmetric and plump.The specimens have good ductility,stable strength and strong capacity of energy dissipation.Solid-web steel reinforced concrete cross-shaped columns have the worst ductility under the loading direction of 45° and the lowest bearing capacity under the loading direction of 0°.Solid-web steel reinforced concrete L-shaped columns have the worst ductility and the lowest bearing capacity under the loading direction of 45°.The limits of axial compression ratio of solid-web steel reinforced concrete cross-shaped and L-shaped columns corresponding to the second grade of seismic requirements are 0.65 and 0.45,respectively.For both types of columns,the limit decreases by 0.1 for the first grade of seismic requirements and increases by 0.1 for the third grade of seismic requirements.
Three solid-web steel reinforced concrete cross-shaped column specimens and three L-shaped column specimens were tested under low cyclic reversed loading using the Kenken-style(PCE) loading device,considering the influence of steel ratio and axial compression ratio.The failure process was observed.The failure patterns and seismic behaviors,such as the load-displacement hysteretic loops and skeleton curves,ductility,strength,stiffness and energy dissipation capacity,were analyzed.Based on the experimental study,finite element analysis(FEA) was carried out using ABAQUS and a subroutine named PQ-Fiber.The FEA results agree well with the experimental results.The influence of loading directions and the limit of axial compression ratio of solid-web steel reinforced concrete cross-shaped columns and L-shaped columns were analyzed.The research results show that the failure pattern of all specimens with a shear span ratio of 2.5 is flexural failure.The hysteretic loops are symmetric and plump.The specimens have good ductility,stable strength and strong capacity of energy dissipation.Solid-web steel reinforced concrete cross-shaped columns have the worst ductility under the loading direction of 45° and the lowest bearing capacity under the loading direction of 0°.Solid-web steel reinforced concrete L-shaped columns have the worst ductility and the lowest bearing capacity under the loading direction of 45°.The limits of axial compression ratio of solid-web steel reinforced concrete cross-shaped and L-shaped columns corresponding to the second grade of seismic requirements are 0.65 and 0.45,respectively.For both types of columns,the limit decreases by 0.1 for the first grade of seismic requirements and increases by 0.1 for the third grade of seismic requirements.
引文
[1]薛建阳,陈宗平,赵鸿铁.型钢混凝土异形柱结构的性能、设计方法及其工程应用[M].北京:中国建筑工业出版社,2011:1-2.(XUE Jianyang, CHEN Zongping,ZHAO Hongtie. The performance,designing method and engineering application of steel reinforced concrete special-shaped column structures[M].Beijing:China Architecture&Building Press,2011:1-2.(in Chinese))
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[8]蔡新江,贾红星,巩牧华,等.基于单柱子结构模型的型钢混凝土异形柱框架抗震性能混合试验研究[J].建筑结构学报,2017,38(4):35-44.(CAI Xinjiang,JIA Hongxing,GONG Muhua,et al. Seismic hybrid simulation of steel reinforce concrete frame with specially-shaped columns based on single column substructure model[J]. Journal of Building Structures,2017,38(4):35-44.(in Chinese))
[9]陆新征,蒋庆,缪志伟,等.建筑抗震弹塑性分析[M].北京:中国建筑工业出版社,2015:133-142.(LU Xinzheng,JIANG Qing,MIAO Zhiwei,et al.Elasto-plastic analysis of buildings against earthquake[M]. Beijing:China Architecture&Building Press,2015:133-142.(in Chinese))
[10] NIE J G,QIN K,CAI C S. Seismic behavior of connections composed of CFSSTCs and steel-concrete composite beams:finite element analysis[J]. Journal of Constructional Steel Research,2008,64(6):680-688.
[11]陈宗平,薛建阳,赵鸿铁,等.型钢混凝土异形柱的力学特性研究[J].西安建筑科技大学学报(自然科学版),2010,42(3):329-334.(CHEN Zongping,XUE Jianyang,ZHAO Hongtie,et al. Research on mechanics behavior of steel reinforced concrete specialshaped columns[J]. Journal of Xi’an University of Architecture and Technology(Natural Science Edition),2010,42(3):329-334.(in Chinese))
[12] CHEN Z P,XU J J,XUE J Y. Hysteretic behavior of special shaped columns composed of steel and reinforced concrete(SRC)[J]. Earthquake Engineering and Engineering Vibration,2015,14(2):329-35.
[13]杨正海,潘文,何玲,等.水平地震作用方向对异形柱结构整体分析的影响[J].世界地震工程,2006,22(3):160-165.(YANG Zhenghai, PAN Wen, HE Ling,et al. Effect of seismic action directions on global analysis of structures with special-shaped columns[J].World Earthquake Engineering,2006,22(3):160-165.(in Chinese))
[14]李俊华.低周反复荷载下型钢高强混凝土柱受力性能研究[D].西安:西安建筑科技大学,2005:55.(LI Junhua. Study on the performance of steel reinforced high-strength concrete columns under cyclic reversed loading[D]. Xi’an:Xi’an University of Architecture and Technology,2005:55.(in Chinese))
[15]贾金青,姜睿,厚童.钢骨超高强混凝土框架柱的抗震性能试验研究[J].土木工程学报,2006,39(8):14-18.(JIA Jinqing,JIANG Rui,HOU Tong. An experimental study on the seismic performance of steel reinforced super high-strength concrete columns[J].China Civil Engineering Journal,2006,39(8):14-18.(in Chinese))
[2]徐亚丰,白首晏,刁晓征.异形截面钢骨混凝土柱技术[M].北京:科学出版社,2010:25-47,74-187.(XU Yafeng,BAI Shouyan,DIAO Xiaozheng. The technology of steel reinforced concrete columns with special shapes[M]. Beijing:Science Press,2010:25-47,74-187.(in Chinese))
[3] TOKGOZ S,DUNDAR C. Test of eccentrically loaded L-shaped section steel fibre high strength reinforced concrete and composite columns[J]. Engineering Structures,2012,38(5):134-141.
[4]李琪,魏晓斌.角钢加强钢筋混凝土十字形截面异形柱抗震性能分析[J].建筑结构,2011,41(8):92-95.(LI Qi,WEI Xiaobin. Anti-seismic analysis of cross-shaped RC columns reinforced by angle steel[J].Building Structure,2011,41(8):92-95.(in Chinese))
[5]李琪,吴佳杰.低周反复荷载作用下钢骨混凝土L形柱受力性能试验[J].建筑结构,2011,41(1):11-13.(LI Qi, WU Jiajie. Experimental study of L-shaped section steel reinforced concrete column under low reversed cyclic loading[J]. Building Structure,2011,41(1):11-13.(in Chinese))
[6]张波,方林,金国芳,等.实腹式配钢的型钢混凝土十字形异形柱的抗震性能[J].华南理工大学学报(自然科学版),2014,42(11):121-128.(ZHANG Bo,FANG Lin,JING Guofang,et al. Seismic behavior of solid-web steel-reinforced-concrete cross-shaped columns[J]. Journal of South China University of Technology(Natural Science Edition),2014,42(11):121-128.(in Chinese))
[7]陈宗平,薛建阳,赵鸿铁,等.型钢混凝土异形柱抗震性能试验研究[J].建筑结构学报,2007,28(3):53-61.(CHEN Zongping, XUE Jianyang, ZHAO Hongtie,et al. Experimental study on seismic behavior of steel reinforced concrete special-shaped columns[J].Journal of Building Structures,2007,28(3):53-61.(in Chinese))
[8]蔡新江,贾红星,巩牧华,等.基于单柱子结构模型的型钢混凝土异形柱框架抗震性能混合试验研究[J].建筑结构学报,2017,38(4):35-44.(CAI Xinjiang,JIA Hongxing,GONG Muhua,et al. Seismic hybrid simulation of steel reinforce concrete frame with specially-shaped columns based on single column substructure model[J]. Journal of Building Structures,2017,38(4):35-44.(in Chinese))
[9]陆新征,蒋庆,缪志伟,等.建筑抗震弹塑性分析[M].北京:中国建筑工业出版社,2015:133-142.(LU Xinzheng,JIANG Qing,MIAO Zhiwei,et al.Elasto-plastic analysis of buildings against earthquake[M]. Beijing:China Architecture&Building Press,2015:133-142.(in Chinese))
[10] NIE J G,QIN K,CAI C S. Seismic behavior of connections composed of CFSSTCs and steel-concrete composite beams:finite element analysis[J]. Journal of Constructional Steel Research,2008,64(6):680-688.
[11]陈宗平,薛建阳,赵鸿铁,等.型钢混凝土异形柱的力学特性研究[J].西安建筑科技大学学报(自然科学版),2010,42(3):329-334.(CHEN Zongping,XUE Jianyang,ZHAO Hongtie,et al. Research on mechanics behavior of steel reinforced concrete specialshaped columns[J]. Journal of Xi’an University of Architecture and Technology(Natural Science Edition),2010,42(3):329-334.(in Chinese))
[12] CHEN Z P,XU J J,XUE J Y. Hysteretic behavior of special shaped columns composed of steel and reinforced concrete(SRC)[J]. Earthquake Engineering and Engineering Vibration,2015,14(2):329-35.
[13]杨正海,潘文,何玲,等.水平地震作用方向对异形柱结构整体分析的影响[J].世界地震工程,2006,22(3):160-165.(YANG Zhenghai, PAN Wen, HE Ling,et al. Effect of seismic action directions on global analysis of structures with special-shaped columns[J].World Earthquake Engineering,2006,22(3):160-165.(in Chinese))
[14]李俊华.低周反复荷载下型钢高强混凝土柱受力性能研究[D].西安:西安建筑科技大学,2005:55.(LI Junhua. Study on the performance of steel reinforced high-strength concrete columns under cyclic reversed loading[D]. Xi’an:Xi’an University of Architecture and Technology,2005:55.(in Chinese))
[15]贾金青,姜睿,厚童.钢骨超高强混凝土框架柱的抗震性能试验研究[J].土木工程学报,2006,39(8):14-18.(JIA Jinqing,JIANG Rui,HOU Tong. An experimental study on the seismic performance of steel reinforced super high-strength concrete columns[J].China Civil Engineering Journal,2006,39(8):14-18.(in Chinese))
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