活性粉末混凝土柱抗震性能试验
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摘要
为了考察活性粉末混凝土柱类构件的抗震性能,开展了18根活性粉末混凝土柱的拟静力试验,研究了轴压比、纵筋配筋率、配箍率和钢纤维体积含量4个因素对活性粉末混凝土柱破坏形态、滞回特性、骨架曲线、刚度、承载力及延性的影响规律.研究表明:活性粉末混凝土柱的承载力随着轴压比的增大而提高,但其延性随着轴压比的增大有下降的趋势;试件柱的承载力及位移延性系数随着纵筋配筋率的增大而显著增大;配箍率的提高一定程度上改善了荷载达到峰值后阶段的滞回特性,骨架曲线的下降段变得较为平缓;钢纤维掺量的增加,改善了试件柱的破坏进程,一定程度上提高了试件柱的延性及耗能能力.
To explore the seismic performance of reactive powder concrete(RPC) column,the quasi-static test of 18 RPC columns are carried out.The factors affecting the column failure patterns,hysteretic characteristics,skeleton curves,rigidity,bearing capacity and ductility were analyzed in this paper,which included axial compression ratio,longitudinal reinforcement ratio,stirrup ratio and steel fiber volume content.The results show that,the bearing capacity of reinforced RPC columns increases,but the ductility decreases with the increase of axial compression ratio.The bearing capacity and displacement ductility coefficient of reinforced RPC columns significantly increases with the increase of longitudinal reinforcement.The stirrup ratio has large influence on the hysteretic behavior of reinforced RPC columns and the skeleton curve flattens out as load exceeds the peak point.The steel fiber volume content has large influence on fracture process of RPC columns,with the increase of steel fiber content,and the ductility of reinforced RPC columns can be improved to a certain extent.
To explore the seismic performance of reactive powder concrete(RPC) column,the quasi-static test of 18 RPC columns are carried out.The factors affecting the column failure patterns,hysteretic characteristics,skeleton curves,rigidity,bearing capacity and ductility were analyzed in this paper,which included axial compression ratio,longitudinal reinforcement ratio,stirrup ratio and steel fiber volume content.The results show that,the bearing capacity of reinforced RPC columns increases,but the ductility decreases with the increase of axial compression ratio.The bearing capacity and displacement ductility coefficient of reinforced RPC columns significantly increases with the increase of longitudinal reinforcement.The stirrup ratio has large influence on the hysteretic behavior of reinforced RPC columns and the skeleton curve flattens out as load exceeds the peak point.The steel fiber volume content has large influence on fracture process of RPC columns,with the increase of steel fiber content,and the ductility of reinforced RPC columns can be improved to a certain extent.
引文
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[2]郑文忠,李莉,卢姗姗.钢筋活性粉末混凝土简支梁正截面受力性能试验研究[J].建筑结构学报,2011,32(6):126-134.
[3]郑文忠,卢姗姗,李莉.GFRP筋活性粉末混凝土梁受力性能试验研究[J].建筑结构学报,2011,32(6):115-124.
[4]鞠彦忠,王德弘,张超.活性粉末混凝土的研究与应用进展[J].东北电力大学学报,2011,31(5/6):9-15.
[5]MALIK A,FOSTER S.Carbon fiber-reinforced polymerconfined reactive powder concrete columns-experimentalinvestigation[J].ACI Structural Journal,2010,107(3):263-271.
[6]MALIK A R,FOSTER S J.Behaviour of reactivepowder concrete columns without steel ties[J].Journalof Advanced Concrete Technology,2008,6(2):377-386.
[7]周轶峰,阎贵平.活性粉末混凝土预制桥墩的设计研究[J].铁道建筑,2006(1):6-9.
[8]许丽娜.活性粉末混凝土桥墩的地震响应分析[D].北京:北京交通大学,2007.
[9]赵冠远,阎贵平.活性粉末混凝土柱的抗震性能试验研究[J].中国安全科学学报,2004,14(7):94-97.
[10]郝文秀,钟铁毅.活性粉末混凝土桥墩延性试验研究与数值分析[J].土木工程学报,2010,43(6):82-86.
[11]GB50011—2002建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.
[12]JGJ101—96建筑抗震试验方法规程[S].北京:中国建筑工业出版社,1997.
[13]朱伯龙.结构抗震试验[M].北京:地震出版社,1989.
[2]郑文忠,李莉,卢姗姗.钢筋活性粉末混凝土简支梁正截面受力性能试验研究[J].建筑结构学报,2011,32(6):126-134.
[3]郑文忠,卢姗姗,李莉.GFRP筋活性粉末混凝土梁受力性能试验研究[J].建筑结构学报,2011,32(6):115-124.
[4]鞠彦忠,王德弘,张超.活性粉末混凝土的研究与应用进展[J].东北电力大学学报,2011,31(5/6):9-15.
[5]MALIK A,FOSTER S.Carbon fiber-reinforced polymerconfined reactive powder concrete columns-experimentalinvestigation[J].ACI Structural Journal,2010,107(3):263-271.
[6]MALIK A R,FOSTER S J.Behaviour of reactivepowder concrete columns without steel ties[J].Journalof Advanced Concrete Technology,2008,6(2):377-386.
[7]周轶峰,阎贵平.活性粉末混凝土预制桥墩的设计研究[J].铁道建筑,2006(1):6-9.
[8]许丽娜.活性粉末混凝土桥墩的地震响应分析[D].北京:北京交通大学,2007.
[9]赵冠远,阎贵平.活性粉末混凝土柱的抗震性能试验研究[J].中国安全科学学报,2004,14(7):94-97.
[10]郝文秀,钟铁毅.活性粉末混凝土桥墩延性试验研究与数值分析[J].土木工程学报,2010,43(6):82-86.
[11]GB50011—2002建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.
[12]JGJ101—96建筑抗震试验方法规程[S].北京:中国建筑工业出版社,1997.
[13]朱伯龙.结构抗震试验[M].北京:地震出版社,1989.
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