基于6根试验柱在既定轴力下的低周往复加载试验数据、滞回曲线及各阶段的柱顶水平荷载和位移,以峰值荷载点为基准,将试件的骨架曲线拟合为三线段,确定了试件屈服点、极限点与峰值点的关系,根据荷载达峰值时的柱顶水平位移及截面平衡条件推导出了峰值荷载的计算公式;对试验结果进行分析,得到了极限位移、峰值荷载对应位移与核心区纵筋配筋率、核心区面积比及配箍特征值的线性公式;结合试件的滞回规律构建了高强混凝土加芯柱的恢复力模型,并将计算滞回曲线与试验值进行了对比。结果表明:拟合的骨架曲线特征点的计算方法具有较高的精度,构建的恢复力模型与高强混凝土加芯柱的试验滞回曲线吻合较好。
Abstract
Based on the test results of 6 specimens under constant vertical load but low-cycle horizontal load, including the hysteretic curves, horizontal load values and corresponding displacements at the top of each specimen at each stage of loading, and with the peak load as reference point, their skeleton curves were fitted as idealized tri-linear curves so that the relations between the yield point, points of ultimate displacement and peak load were determined. On the basis of horizontal top displacements at peak load and internal force equilibrium of the cross section, the formula for the calculation of peak loads was derived. From the analysis of test results, a linear relation of ultimate displacement and displacement at peak load with core longitudinal reinforcement ratio, core area and property of tie was obtained. In combination with the hysteretic properties of the specimens, the restoring model of such type of columns was obtained. The research results indicate that this method for the calculation of the characteristic points of fitted tri-linear skeleton curves has high precision, and the constructed restoring force model of high-strength concrete columns with central reinforcement matches well with the hysteric curves from the test.
关键词
桥梁工程 /
高强混凝土加芯柱 /
往复加载试验 /
恢复力特性 /
抗震
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Key words
bridge engineering /
high-strength concrete column with central reinforcement /
cyclic loading test /
restoring-force property /
seismic resistance
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中图分类号：
U442.55
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参考文献
[1] 程丽荣,钱稼茹,范 重,等.核心配筋柱中心受压试验研究[J].工程力学,2000,30(增1):579-584.
CHENG Li-rong,QIAN Jia-ru,FAN Zhong,et al.Test Study of Columns with Central Reinforcement Under Axial Loads[J].Engineering Mechanics,2000,30(S1):579-584.
[2]范 重,钱稼茹,吴学敏.核心配筋柱抗震性能试验研究[J].建筑结构学报,2001,22(1):14-19.
FAN Zhong,QIAN Jia-ru,WU Xue-min.Experimental Study on Seismic Behavior of Concrete Columns with Central Reinforcement[J].Journal of Building Structures,2001,22(1):14-19.
[3]郭军庆,雷自学,陈鹏郎,等.高轴压比下加芯混凝土框架柱延性与承载力试验研究[J].建筑结构学报,2008,29(4):89-95.
GUO Jun-qing,LEI Zi-xue,CHEN Peng-lang,et al.Experimental Study on Ductility and Bearing Capacity of Concrete Frame Columns with Central Reinforcement Under High Axial Compression Ratio[J].Journal of Building Structures,2008,29(4):89-95.
[4]TANAKA Y,RO Y,NAKAGAWA O,et al.Strengthening of Reinforced Concrete Columns by Central Reinforcing Element[C]//IAEE.Proceedings of the Eleventh World Conference on Earthquake Engineering.Acapulo:IAEE,1996:1-8.
[5]YASHIRO H,TANAKA Y,HIROSE K,et al.Seismic Upgrade for Reinforced Concrete Columns by Strengthening the Cross Sectional Center[C]//IAEE.Proceedings of the Twelveth World Conference on Earthquake Engineering.Auckland:IAEE,2000:1-8.
[6]董三升,赵均海.不同配筋形式柱的抗震延性[J].建筑科学与工程学报,2010,27(3):121-126.
DONG San-sheng,ZHAO Jun-hai.Seismic Ductility of Concrete Columns with Different Reinforcement Patterns [J].Journal of Architecture and Civil Engineering,2010,27(3):121-126.
[7]GB 50010—2010,混凝土结构设计规范[S].
GB 50010—2010,Code for Seismic Design of Buildings[S].
[8]雷自学,董三升,郭军庆,等.高强混凝土加芯柱抗震性能试验研究[J].建筑结构学报,2010,31(12):83-91.
LEI Zi-xue,DONG San-sheng,GUO Jun-qing,et al.Test Study on Seismic Performance of High-strength Concrete Columns with Central Reinforcement[J].Journal of Building Structures,2010,31(12):83-91.
[9]郭子雄,吕西林.高轴压比框架柱恢复力模型试验研究[J].土木工程学报,2004,37(5):32-38.
GUO Zi-xiong,LU Xi-lin.Experimental Study on the Hysteretic Model of RC Columns with High Axial Compressive Ratio[J].China Civil Engineering Journal,2004,37(5):32-38.
[10]王海生,陈以一,赵宪忠,等.高含钢率钢骨混凝土柱试验和恢复力模型[J].地震工程与工程振动,2010,30(4):57-65.
WANG Hai-sheng,CHEN Yi-yi,ZHAO Xian-zhong,et al.Experimental Study on SRC Columns with High Rate of Encased Steel and Their Restoring Force Model[J].Journal of Earthquake Engineering and Engineering Vibration,2010,30(4):57-65.
[11]叶列平,丁大钧,程文瀼.高强砼框架柱抗震性能的试验研究[J].建筑结构学报,1992,13(4):41-48.
YE Lie-ping,DING Da-jun,CHENG Wen-rang.Experimental Research on Earthquake Resistance Behavior of High-strength Concrete Frame Columns[J].Journal of Building Structures,1992,13(4):41-48.
[12]沈聚敏,周锡元,高小旺,等.抗震工程学[M].北京:中国建筑工业出版社,2000.
SHEN Ju-min,ZHOU Xi-yuan,GAO Xiao-wang,et al.Earthquake Engineering[M].Beijing:China Architecture & Building Press,2000.
[13]马恺泽,梁兴文,李 斌.方钢管高强混凝土柱恢复力模型研究[J].世界地震工程,2011,27(1):54-59.
MA Kai-ze,LIANG Xing-wen,LI Bin.Research on the Restoring Force Model of High Strength Concrete-filled Rectangular Steel Tubular Columns[J].World Earthquake Engineering,2011,27(1):54-59.
[14]郭子雄,杨 勇.恢复力模型研究现状及存在问题[J].世界地震工程,2004,20(4):48-51.
GUO Zi-xiong,YANG Yong.State-of-the-art of Restoring Force Models for RC Structures[J].World Earthquake Engineering,2004,20(4):48-51.
[15]张国军,吕西林,刘伯权.轴压比超限时框架柱的恢复力模型研究[J].建筑结构学报,2006,27(1):90-98.
ZHANG Guo-jun,LU Xi-lin,LIU Bo-quan.Research on Restoring Force Models of Frame Columns with Ultra-limited Axial Compression Ratio[J].Journal of Building Structures,2006,27(1):90-98.
[16]JGJ 101—1996,建筑抗震试验方法规程[S].
JGJ 101—1996,Specificating of Testing Methods for Earthquake Resistant Building[S].
[17]PARK R,PAULAY T.Reinforced Concrete Structures[M].New York:John Wiley & Sons,1975.
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脚注
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基金
陕西省自然科学基础研究计划项目(2007E220);中央高校基本科研业务费专项资金项目(CHD2011JC053)
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