HSRC框架柱抗震性能试验研究
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摘要
为了研究HSRC(high-strength reinforced concrete)框架柱的抗震性能,对19根HSRC框架柱采用低周反复加载方法进行拟静力试验.研究了HSRC框架柱在压弯剪共同作用下的破坏特征和抗震性能;分析了含钢量、轴压比、配箍率、剪跨比以及混凝土强度对HSRC框架柱抗震性能的影响.结果表明:与普通RC框架柱相比,HSRC框架柱极限承载力与延性显著提高,抗震性能明显改善;在压弯剪共同作用下,含钢量、剪跨比、混凝土强度对HSRC框架柱的抗震性能影响较大,轴压比、体积配箍率对HSRC框架柱的抗震性能影响较小;剪跨比大于等于3的HSRC框架柱的经济合理参数为:含钢量3.5%~4.5%;设计轴压比0.45~0.60;体积配箍率0.8%~1.0%.
In order to investigate the failure mode and seismic behaviors of high-strength reinforced concrete(HSRC) frame columns under the combined action of compression,bending and shear,quasi-static experiments on 19 such frame columns under low cyclic reversed loading were conducted.The influences of parameters such as steel content,axial compression ratios,stirrup ratio,shear-span ratio and concrete strength on the seismic behaviors of the HSRC frame columns were analyzed.The results show that the ultimate bearing capacity and ductility of HSRC columns improves considerably,compared with reinforced concrete(RC) columns;and hence the seismic performance of the HSRC columns is remarkably better.Under the combined action of compression,bending and shear,steel content,shear-span ratio and concrete strength play more dominant roles than other parameters in enhancing the seismic performance of HSRC columns.The rational parameters for HSRC columns whose λ is not less than 3 are 3.5%-4.5% steel content,0.45-0.60 axial compression ratios,and 0.8%-1.0% transverse reinforcement ratio.
In order to investigate the failure mode and seismic behaviors of high-strength reinforced concrete(HSRC) frame columns under the combined action of compression,bending and shear,quasi-static experiments on 19 such frame columns under low cyclic reversed loading were conducted.The influences of parameters such as steel content,axial compression ratios,stirrup ratio,shear-span ratio and concrete strength on the seismic behaviors of the HSRC frame columns were analyzed.The results show that the ultimate bearing capacity and ductility of HSRC columns improves considerably,compared with reinforced concrete(RC) columns;and hence the seismic performance of the HSRC columns is remarkably better.Under the combined action of compression,bending and shear,steel content,shear-span ratio and concrete strength play more dominant roles than other parameters in enhancing the seismic performance of HSRC columns.The rational parameters for HSRC columns whose λ is not less than 3 are 3.5%-4.5% steel content,0.45-0.60 axial compression ratios,and 0.8%-1.0% transverse reinforcement ratio.
引文
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[13]李杰,李国强.地震工程导论[M].北京:地震出版社,1992:117-119.
[14]沈聚敏,锡元,高小旺,等.抗震工程学[M].北京:中国建筑工业出版社,2000:34-38.
[15]过镇海,时旭东.钢筋混凝土原理与分析[M].北京:清华大学出版社,2003:336-342.
[2]蒋东红,王连广,刘之洋.高强钢骨混凝土框架柱的抗震性能[J].东北大学学报:自然科学版,2002,23(1):67-70.JIANG Donghong,WANG Lianguang,LIU Zhiyang.Seismic behavior of steel reinforced high-strengthconcrete short columns[J].Journal of NortheasternUniversity:Natural Science Edition,2002,23(1):67-70.
[3]蒋东红,王连广,刘之洋,等.高强钢骨混凝土框架柱的抗剪强度计算[J].辽宁工程技术大学学报:自然科学版,21(2):164-167.JIANG Donghong,WANG Lianguang,LIU Zhiyang,etal.A method of calculating the shear strength of steelreinforced high-strength concrete short columns[J].Journal of Liaoning Technical University:NaturalScience Edition,2002,21(2):164-167.
[4]叶列平,方鄂华,赵树红.钢骨混凝土构件的受剪承载力计算[J].建筑结构,1999,7:17-21.YE Lieping,FANG Ehua,ZHAO Shuhong.Calculationon shear resistance capacity for steel reinforced concreteelements[J].Building Structure,1997,7:17-21.
[5]赵世春,陈家夔,路湛沁.劲性混凝土构件正截面强度计算方法[C]∥混凝土结构基本理论及应用第二届学术讨论会论文集(第二卷),[s.l.]:[s.n],1990:625-631.ZHAO Shichun,CHEN Jiakui,LU Zhanqin.Calculation method of normal section strength in steelreinforced concrete[C]∥2nd Basic Theory andApplication of Concrete Structure Forum(Volume 2),1990:625-631.
[6]李俊华,王新堂,薛建阳,等.低周反复荷载下型钢高强混凝土柱受力性能试验研究[J].土木工程学报,2007,40(7):11-18.LI Junhua,WANG Xintang,XUE Jianyang.Experimental study on the performance of steelreinforced high-strength concrete columns under lowcyclic reversed loading[J].China Civil EngineeringJournal,2007,40(7):11-18.
[7]李俊华,薛建阳,王新堂,等.反复荷载下型钢混凝土柱粘结滑移性能试验研究[J].工程力学,2009,26(4):98-104.LI Junhua,XUE Jianyang,WANG Xintang.Experimental study on bond slip behavior between shapesteel and concrete in SRC columns under cyclic reversedloading[J].Engineering Mechanics,2009,26(4):98-104.
[8]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.
[9]支运芳,邱阳,陈子静.型钢高强混凝土柱合理含钢量实验[J].重庆工学院学报,2008,22(5):28-31.ZHI Yunfang,QIU Yang,CHEN Zijing.Experimentalstudy on reasonable steel contents of steel reinforcedhigh-strength concrete columns[J].Journal ofChongqing Institute of Technology,2008,22(5):28-31.
[10]支运芳,刘伟,陈永庆.型钢高强混凝土柱的轴压比限值的研究[J].重庆建筑大学学报,2007,29(增刊):222-227.ZHI Yunfang,LIU Wei,CHEN Yongqing.Study onlimit value of axial compression ratio of steel reinforcedhigh-strength concrete columns[J].Journal ofChongqing Jianzhu University,2007,29(Sup.):222-227.
[11]蒋传星.配箍率对剪跨比为5的型钢高强混凝土柱受力性能影响的试验研究[D].重庆:重庆大学,2007.
[12]黄承逵,曲福来,赵顺波.钢筋混凝土不等肢异形柱抗剪性能试验研究[J].西南交通大学学报,2008,43(3):325-329.HUANG Chengkui,QU Fulai,ZHAO Shunbo.Experimental research on shear behaviors of speciallyshaped RC columns with different lengths of limbs[J].Journal of Southwest Jiaotong University,2008,43(3):325-329.
[13]李杰,李国强.地震工程导论[M].北京:地震出版社,1992:117-119.
[14]沈聚敏,锡元,高小旺,等.抗震工程学[M].北京:中国建筑工业出版社,2000:34-38.
[15]过镇海,时旭东.钢筋混凝土原理与分析[M].北京:清华大学出版社,2003:336-342.
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