型钢再生混凝土长柱恢复力模型的试验研究
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摘要
根据7个型钢再生混凝土长柱拟静力试验结果,通过理论分析和试验数据拟合,给出型钢再生混凝土长柱恢复力模型的特征参数的计算方法,提出"定点指向"三折线恢复力模型。研究结果表明:轴压比、配箍率、粗骨料取代率对构件的极限荷载与屈服荷载的比值影响较小,近似趋于定值0.8;极限荷载随着轴压比的增大而增大,延性随着粗骨料取代率和轴压比的增大而降低,随着配箍率的增大而提高;通过试验骨架曲线和计算骨架曲线的对比,二者比较吻合,能够比较全面地反映构件的实际受力性能,所提恢复力模型较为合理。
Based on the quasi-static test results of 7 steel reinforced recycled aggregate concrete(SRRC) columns,the method of calculation of the characteristic parameters was given and the "designated point"broken tri-linear restoring force model for steel reinforced recycled aggregate concrete columns was also proposed by the theoretical analysis and experimental data fitting.The results show that the axial compression ratio,stirrup ratio and coarse aggregate replacement rate have little influence on the ratio of ultimate load to yield load,which approximates 0.8.The ultimate load increases with the increase of axial compression ratio.However,the ductility decreases with the increase of the coarse aggregate replacement rate and axial compression ratio,yet it increases as the stirrup ratio increasing.Through the comparison between the test results and the calculated results,the restoring force model can reflect the mechanical performance of SRRC components and the results agree well with the test results,indicating that the restoring force model can be used for SRRC columns.
Based on the quasi-static test results of 7 steel reinforced recycled aggregate concrete(SRRC) columns,the method of calculation of the characteristic parameters was given and the "designated point"broken tri-linear restoring force model for steel reinforced recycled aggregate concrete columns was also proposed by the theoretical analysis and experimental data fitting.The results show that the axial compression ratio,stirrup ratio and coarse aggregate replacement rate have little influence on the ratio of ultimate load to yield load,which approximates 0.8.The ultimate load increases with the increase of axial compression ratio.However,the ductility decreases with the increase of the coarse aggregate replacement rate and axial compression ratio,yet it increases as the stirrup ratio increasing.Through the comparison between the test results and the calculated results,the restoring force model can reflect the mechanical performance of SRRC components and the results agree well with the test results,indicating that the restoring force model can be used for SRRC columns.
引文
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[2]沈聚敏,翁义军,冯世平.周期反复荷载下钢筋混凝土压弯构件的性能[J].土木工程学报,1982,15(2):53-64.
[3]朱伯龙,张琨联.矩形及环形截面压弯构件恢复力特性的研究[J].同济大学学报,1981,9(2):1-10.
[4]郭子雄,杨勇.恢复力模型研究现状及存在的问题[J].世界地震工程,2004,20(4):47-51.
[5]郭子雄,张志伟,黄群贤,等.型钢混凝土柱恢复力模型试验研究[J].地震工程与工程振动,2009,29(5):79-85.
[6]白国良,石启印.空腹式型钢混凝土框架柱的恢复力性能[J].西安建筑科技大学学报,1999,31(1):32-34.
[7]刘阳,郭子雄,黄群贤.核心型钢混凝土柱恢复力模型试验研究[J].建筑结构学报,2009,30(S2):196-201.
[8]薛建阳,王运成,马辉,等.型钢再生混凝土柱水平承载力及轴压比限值的试验研究[J].工业建筑,2013,43(9):32-37.
[9]肖建庄.再生混凝土[M].北京:中国建筑工业出版社,2008.
[10]靳鹏.型钢混凝土转换柱(SRC-RC)恢复力模型的研究与理论分析[D].西安:西安建筑科技大学,2008.
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