钢管再生混凝土柱抗震性能与损伤评价
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摘要
以再生粗骨料取代率、混凝土强度为主要参数,完成了6个钢管再生混凝土柱试件的低周反复试验,研究了其破坏形态和滞回特性,分析其承载力、刚度退化、延性、耗能能力、破坏形态等抗震性能.结果表明:钢管再生混凝土柱具有良好的抗震性能;试件的耗能能力、延性、滞回特性随着再生粗骨料取代率、混凝土强度的改变而略有变化;考虑粘结滑移与否对试件的抗震性能影响很小;钢管再生混凝土柱极限承载力受再生粗骨料取代率的影响并不明显.最后,提出了基于Miner原理的改进损伤评估模型,通过对比表明该模型能较好地反映钢管再生混凝土柱的抗震损伤水平,与试验结果符合良好.
This paper presents a low frequency cyclic loading test for six recycled concrete-filled steel tube(RCFS) columns.The main parameters in this study include the recycled coarse aggregate(RCA) replacement percentage and the strength of core concrete.The bearing capacity,stiffness degradation,ductility,energy dissipation capacity and failure pattern of columns with different RCA replacement percentage are experimentally studied.Research findings indicate that the RCFS columns exhibit fine seismic behavior.The energy dissipation ability,ductility and hysteresis performance change slightly with the variation of the RCA replacement percentage and concrete strength.It is also figured out that the bond-slip has little effect on the seismic behavior of the RCFS columns,and the RCA replacement percentage does not influence the bearing capacity of confined recycled concrete columns obviously.Finally,an improved damage assessment model which is based on the Miner principle is developed.The damage level of RCFS columns is better reflected by this model,and the analysis results are in accordance with the test ones.
This paper presents a low frequency cyclic loading test for six recycled concrete-filled steel tube(RCFS) columns.The main parameters in this study include the recycled coarse aggregate(RCA) replacement percentage and the strength of core concrete.The bearing capacity,stiffness degradation,ductility,energy dissipation capacity and failure pattern of columns with different RCA replacement percentage are experimentally studied.Research findings indicate that the RCFS columns exhibit fine seismic behavior.The energy dissipation ability,ductility and hysteresis performance change slightly with the variation of the RCA replacement percentage and concrete strength.It is also figured out that the bond-slip has little effect on the seismic behavior of the RCFS columns,and the RCA replacement percentage does not influence the bearing capacity of confined recycled concrete columns obviously.Finally,an improved damage assessment model which is based on the Miner principle is developed.The damage level of RCFS columns is better reflected by this model,and the analysis results are in accordance with the test ones.
引文
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[3]吴波,刘伟,刘琼祥,等.薄壁钢管再生混合短柱轴压性能试验研究[J].建筑结构学报,2010,31(8):22.WU Bo,LIU Wei,LIU Qiongxiang,et al.Axial behavior ofthin-walled steel stub columns filled with demolished concretesegment/lump[J].Journal of Building Structures,2010,31(8):22.
[4]肖建庄,杨洁,黄一杰,等.钢管约束再生混凝土轴压试验研究[J].建筑结构学报,2011,32(6):92.XIAO Jianzhuang,YANG Jie,HUANG Yijie,et al.Experimental study on recycled concrete confined by steel tubeunder axial compression[J].Journal of Building Structures,2011,32(6):92.
[5]YANG Youfu,HAN Linhai,ZHU Lintao.Experimentalperformance of recycled aggregate concrete-filled circular steeltubular columns subjected to cyclic flexural loadings[J].Advances in Structural Engineering,2009,12(2):183.
[6]Chai Y H.An analysis of the seismic characteristic of steel-jacketed circular bridge columns[J].Earthquake Engineeringand Structural Dynamics,1996,25:149.
[7]Zhang G W,Xiao Y,Kunnath S.Low-cycle fatigue damage ofcircular concrete-filled-tube columns[J].ACI StructuralJournal,2009,106(2):151.
[8]邱法维,杨卫东,欧进萍.钢管混凝土柱滞回耗能和累积损伤的实验研究[J].哈尔滨建筑大学学报,1996,29(3):41.QIU Fawei,YANG Weidong,OU Jinping.Experiment studieson concrete filled Steel tube column hysteresis energydissipation and cumulative damage[J].The Journal of HaerbinArchitecture University,1996,29(3):41.
[9]McCabe S L,Hall W J.Assessment of seismic structuraldamage[J].Journal of Structural Engineering,1989,115(9):2166.
[10]Park Y J,Ang A H S.Mechanic seismic damage model forreinforced concrete[J].Journal of Structural Engineering,1985,111(4):722.
[11]郭子雄,吕西林.高轴压比框架柱抗震性能试验研究[J].华侨大学学报,1999,20(3):258.GUO Zixiong,LXilin.Anti-seismic performance test of RCframed column with high axial compression ratio[J].Journal ofHuaqiao University,1999,20(3):258.
[12]张伟平.钢管混凝土柱在地震作用下的累积损伤性能研究[D].长沙:湖南大学土木工程学院,2009.ZHANG Weiping.Research on cumulative seismic damage ofCFT columns[D].Changsha:College of Civil Engineering ofHunan University,2009.
[13]杜喜凯.往复荷载作用下钢管混凝土柱性能试验及理论分析[D].天津:天津大学建筑工程学院,2010.DU Xikai.Experimental research and theoretical analysis ofseismic behavior of concrete-filled steel tube beam-columnsunder cyclic loading[D].Tianjin:School of Civil Engineeringof Tianjin University,2010.
[14]Park Y J,Ang A H S.Seismic damage analysis of reinforcedconcrete building[J].ASCE,Journal of StructuralEngineering,1985,111(4):740.
[2]Hansen T C,Boegh E.Elasticity and drying shrinkage ofrecycled aggregate concrete[J].ACI Journal,1985,82(5):648.
[3]吴波,刘伟,刘琼祥,等.薄壁钢管再生混合短柱轴压性能试验研究[J].建筑结构学报,2010,31(8):22.WU Bo,LIU Wei,LIU Qiongxiang,et al.Axial behavior ofthin-walled steel stub columns filled with demolished concretesegment/lump[J].Journal of Building Structures,2010,31(8):22.
[4]肖建庄,杨洁,黄一杰,等.钢管约束再生混凝土轴压试验研究[J].建筑结构学报,2011,32(6):92.XIAO Jianzhuang,YANG Jie,HUANG Yijie,et al.Experimental study on recycled concrete confined by steel tubeunder axial compression[J].Journal of Building Structures,2011,32(6):92.
[5]YANG Youfu,HAN Linhai,ZHU Lintao.Experimentalperformance of recycled aggregate concrete-filled circular steeltubular columns subjected to cyclic flexural loadings[J].Advances in Structural Engineering,2009,12(2):183.
[6]Chai Y H.An analysis of the seismic characteristic of steel-jacketed circular bridge columns[J].Earthquake Engineeringand Structural Dynamics,1996,25:149.
[7]Zhang G W,Xiao Y,Kunnath S.Low-cycle fatigue damage ofcircular concrete-filled-tube columns[J].ACI StructuralJournal,2009,106(2):151.
[8]邱法维,杨卫东,欧进萍.钢管混凝土柱滞回耗能和累积损伤的实验研究[J].哈尔滨建筑大学学报,1996,29(3):41.QIU Fawei,YANG Weidong,OU Jinping.Experiment studieson concrete filled Steel tube column hysteresis energydissipation and cumulative damage[J].The Journal of HaerbinArchitecture University,1996,29(3):41.
[9]McCabe S L,Hall W J.Assessment of seismic structuraldamage[J].Journal of Structural Engineering,1989,115(9):2166.
[10]Park Y J,Ang A H S.Mechanic seismic damage model forreinforced concrete[J].Journal of Structural Engineering,1985,111(4):722.
[11]郭子雄,吕西林.高轴压比框架柱抗震性能试验研究[J].华侨大学学报,1999,20(3):258.GUO Zixiong,LXilin.Anti-seismic performance test of RCframed column with high axial compression ratio[J].Journal ofHuaqiao University,1999,20(3):258.
[12]张伟平.钢管混凝土柱在地震作用下的累积损伤性能研究[D].长沙:湖南大学土木工程学院,2009.ZHANG Weiping.Research on cumulative seismic damage ofCFT columns[D].Changsha:College of Civil Engineering ofHunan University,2009.
[13]杜喜凯.往复荷载作用下钢管混凝土柱性能试验及理论分析[D].天津:天津大学建筑工程学院,2010.DU Xikai.Experimental research and theoretical analysis ofseismic behavior of concrete-filled steel tube beam-columnsunder cyclic loading[D].Tianjin:School of Civil Engineeringof Tianjin University,2010.
[14]Park Y J,Ang A H S.Seismic damage analysis of reinforcedconcrete building[J].ASCE,Journal of StructuralEngineering,1985,111(4):740.
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