压弯剪扭复合作用下钢筋混凝土柱抗震性能试验研究
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摘要
研究钢筋混凝土矩形柱在压弯剪扭复合受力下的抗震性能,进行4根钢筋混凝土矩形柱的拟静力试验,考虑扭转偏心距、体积配箍率、轴压比的影响。试验结果表明,有扭转偏心距的试件破坏具有弯扭破坏形态,无扭转偏心距作用的试件发生受弯破坏,扭转偏心距的存在会降低柱的延性,使耗能能力下降,加快刚度退化;轴压比对具有扭转偏心距试件的影响与没有扭转偏心距试件相似,轴压比大的试件屈服荷载增大,但延性和耗能能力降低;提高体积配箍率能改善有扭转偏心距试件的延性和耗能能力,降低刚度退化速度,可作为改善承受压弯剪扭复合作用的钢筋混凝土柱抗震性能的措施。
This paper presents a pseudo static test on four reinforced concrete rectangular columns.The goal of this experiment was to obtain the seismic behavior of reinforced concrete rectangular columns under the compound effect of compression,flexure,shear and torsion. The influence of torsional eccentricity, volume stirrup ratio and axial compression ratio had been taken intoconsideration. The experimental results revealed that the specimens with torsional eccentricity performed bending-torsion failure mode and the ones without torsional eccentricity experienced bending failure. Further more,torsional eccentricity can reduce the ductility and energy dissipation capacity of the specimens,which led to the acceleration of stiffness degradation. It is found that axial compression ratio has the same influence towards the specimens with and without torsional eccentricity. The specimen with a larger compression ratio has a higher yield load,while the ductility and energy dissipation capacity are lower. Increasing volumestirrup ratio can improve the ductility and energy dissipation capacity,reduce the stiffness degradation rate and is therefore able to be considered as a measure to improve the seismic behavior of the reinforced concrete rectangular columns under the compound effect of compression,flexure,shear and torsion.
This paper presents a pseudo static test on four reinforced concrete rectangular columns.The goal of this experiment was to obtain the seismic behavior of reinforced concrete rectangular columns under the compound effect of compression,flexure,shear and torsion. The influence of torsional eccentricity, volume stirrup ratio and axial compression ratio had been taken intoconsideration. The experimental results revealed that the specimens with torsional eccentricity performed bending-torsion failure mode and the ones without torsional eccentricity experienced bending failure. Further more,torsional eccentricity can reduce the ductility and energy dissipation capacity of the specimens,which led to the acceleration of stiffness degradation. It is found that axial compression ratio has the same influence towards the specimens with and without torsional eccentricity. The specimen with a larger compression ratio has a higher yield load,while the ductility and energy dissipation capacity are lower. Increasing volumestirrup ratio can improve the ductility and energy dissipation capacity,reduce the stiffness degradation rate and is therefore able to be considered as a measure to improve the seismic behavior of the reinforced concrete rectangular columns under the compound effect of compression,flexure,shear and torsion.
引文
[1]张喜德,周珍,栗涛.配高强箍筋的高强混凝土柱抗震性能试验研究[J].广西大学学报(自然科学版),2015,40(2):278-283.
[2] BAE S. Seismic performance of full-scale reinforced concrete columns[J]. Aci Structural Journal,2008,105(2):123-133.
[3] PHAM T P,LI B. Seismic behavior of reinforced concrete columns with light transverse reinforcement under different lateral loading directions[J]. Aci Structural Journal,2013,110(5):833-843.
[4]林煌斌,王全凤. HRB400高强钢筋混凝土柱抗震性能分析[J].建筑结构学报,2008,29(增刊1):36-41.
[5]马颖,张勤,贡金鑫.钢筋混凝土柱弯剪破坏恢复力模型骨架曲线[J].建筑结构学报,2012,33(10):116-125.
[6]张勤,贡金鑫,马颖.低周反复荷载下弯剪破坏钢筋混凝土柱的变形性能[J].东南大学学报(自然科学版),2014,44(3):643-649.
[7] LI Q,BELARBI A. Seismic Behavior of RC Columns with Interlocking Spirals under Combined Loadings Including Torsion[J]. Procedia Engineering,2011,14(3):1281-1291.
[8] PRAKASH S,BELARBI A,YOU Y M. Seismic performance of circular RC columns subjected to axial force,bending,and torsion with low and moderate shear[J]. Steel Construction,2010,32(1):46-59.
[9]门进杰,周琦,史庆轩.高强钢筋混凝土复合受扭构件的延性分析[J].建筑结构学报,2008,29(增刊1):167-171.
[10]孙宪春,邱法维,万力.钢筋混凝土柱在弯剪扭耦合作用下的试验研究[J].工程抗震与加固改造,2008,30(3):88-92.
[11]中华人民共和国住房和城乡建设部,中华人民共和国国家质量监督检验检疫总局.建筑抗震设计规范:GB50011-2010(2016版)[S].北京:中国建筑工业出版社,2016.
[12]柯晓军,苏益声,陈宗平,等.钢筋高强混凝土框架柱轴压比限值的确定方法[J].广西大学学报(自然科学版),2016,41(1):114-121.
[13]解咏平,李振宝,杜修力,等.低周反复荷载作用下钢筋混凝土柱抗震性能尺寸效应试验研究[J].建筑结构学报,2013,34(12):86-93.
[14]王全凤,周博,郑济坤,等. HRBF500级细晶钢筋混凝土短柱抗震性能试验研究[J].建筑结构,2014(1):38-41.
[15]钱稼茹,冯宝锐.不同抗震等级钢筋混凝土柱抗震性能试验研究[J].建筑结构学报,2014,35(7):105-114.
[16]孟二从,苏益声,陈朋朋,等.低周反复荷载下方钢管再生混凝土柱抗震性能试验研究[J].广西大学学报(自然科学版),2015,40(4):790-797.
[17]韩小雷,戚永乐,关柱良,等. CRB550级箍筋混凝土柱抗震性能试验研究[J].建筑结构学报,2011,32(12):235-241.
[2] BAE S. Seismic performance of full-scale reinforced concrete columns[J]. Aci Structural Journal,2008,105(2):123-133.
[3] PHAM T P,LI B. Seismic behavior of reinforced concrete columns with light transverse reinforcement under different lateral loading directions[J]. Aci Structural Journal,2013,110(5):833-843.
[4]林煌斌,王全凤. HRB400高强钢筋混凝土柱抗震性能分析[J].建筑结构学报,2008,29(增刊1):36-41.
[5]马颖,张勤,贡金鑫.钢筋混凝土柱弯剪破坏恢复力模型骨架曲线[J].建筑结构学报,2012,33(10):116-125.
[6]张勤,贡金鑫,马颖.低周反复荷载下弯剪破坏钢筋混凝土柱的变形性能[J].东南大学学报(自然科学版),2014,44(3):643-649.
[7] LI Q,BELARBI A. Seismic Behavior of RC Columns with Interlocking Spirals under Combined Loadings Including Torsion[J]. Procedia Engineering,2011,14(3):1281-1291.
[8] PRAKASH S,BELARBI A,YOU Y M. Seismic performance of circular RC columns subjected to axial force,bending,and torsion with low and moderate shear[J]. Steel Construction,2010,32(1):46-59.
[9]门进杰,周琦,史庆轩.高强钢筋混凝土复合受扭构件的延性分析[J].建筑结构学报,2008,29(增刊1):167-171.
[10]孙宪春,邱法维,万力.钢筋混凝土柱在弯剪扭耦合作用下的试验研究[J].工程抗震与加固改造,2008,30(3):88-92.
[11]中华人民共和国住房和城乡建设部,中华人民共和国国家质量监督检验检疫总局.建筑抗震设计规范:GB50011-2010(2016版)[S].北京:中国建筑工业出版社,2016.
[12]柯晓军,苏益声,陈宗平,等.钢筋高强混凝土框架柱轴压比限值的确定方法[J].广西大学学报(自然科学版),2016,41(1):114-121.
[13]解咏平,李振宝,杜修力,等.低周反复荷载作用下钢筋混凝土柱抗震性能尺寸效应试验研究[J].建筑结构学报,2013,34(12):86-93.
[14]王全凤,周博,郑济坤,等. HRBF500级细晶钢筋混凝土短柱抗震性能试验研究[J].建筑结构,2014(1):38-41.
[15]钱稼茹,冯宝锐.不同抗震等级钢筋混凝土柱抗震性能试验研究[J].建筑结构学报,2014,35(7):105-114.
[16]孟二从,苏益声,陈朋朋,等.低周反复荷载下方钢管再生混凝土柱抗震性能试验研究[J].广西大学学报(自然科学版),2015,40(4):790-797.
[17]韩小雷,戚永乐,关柱良,等. CRB550级箍筋混凝土柱抗震性能试验研究[J].建筑结构学报,2011,32(12):235-241.