AFRP加固后钢管再生混凝土承载力分析
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摘要
为了研究掺加玄武岩纤维以及外包AFRP加固对圆钢管再生混凝土短柱试件轴压承载力的影响,试验设计了12根钢管再生混凝土短柱试件,其中6根为对照组试件,6根为加固组试件;以再生骨料替代率、掺加玄武岩纤维为变量分别讨论AFRP加固后掺加玄武岩纤维及再生骨料取代率对试件轴压承载力及轴向和周向应变的影响。结果发现再生骨料取代率对试件的影响最大。最后通过理论分析对AFRP加固后的钢管再生混凝土短柱进行轴压承载力计算,计算结果与试验数据吻合较好。
For the purpose of studying the mechanical behaviors of the recycled aggregate concrete with different replacement percentages of recycled coarse aggregate.Twelve steel tube columns filled with recycled aggregate concrete,which comprising of six original group and six strengthened steel tube.The main experimental parameters included the replacement ratio of recycled coarse aggregates and whether add basalt fiber to recycled aggregate concrete.Analysis the influence of the replacement ratio of recycled coarse aggregates and the basalt fiber about the bearing capacity strain and displacement.The results show that the replacement ratio of recycled coarse aggregates is the most significant influence to the bearing capacity.Finally,based on the influence relationship of the replacement ratio of the recycled concrete between the compressive strengthen.Analytical expression of the bearing capacity about the area of AFRP and the replacement ratio of recycled concrete and verified experimentally.
For the purpose of studying the mechanical behaviors of the recycled aggregate concrete with different replacement percentages of recycled coarse aggregate.Twelve steel tube columns filled with recycled aggregate concrete,which comprising of six original group and six strengthened steel tube.The main experimental parameters included the replacement ratio of recycled coarse aggregates and whether add basalt fiber to recycled aggregate concrete.Analysis the influence of the replacement ratio of recycled coarse aggregates and the basalt fiber about the bearing capacity strain and displacement.The results show that the replacement ratio of recycled coarse aggregates is the most significant influence to the bearing capacity.Finally,based on the influence relationship of the replacement ratio of the recycled concrete between the compressive strengthen.Analytical expression of the bearing capacity about the area of AFRP and the replacement ratio of recycled concrete and verified experimentally.
引文
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[2]张兰芳,尹玉龙,刘晶伟.玄武岩纤维增强混凝土力学性能的研究[J].硅酸盐通报,2014(11):2834-2837
[3]肖建庄,杨洁,黄一杰.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):92-98.
[4]杨慧,原璐,黄庆国.芳纶纤维增强复合材料约束混凝土的动态压缩韧性试验研究[J].工业建筑,2012,42(9):116-119
[5]董江峰,袁书成,王清远.再生混凝土及钢骨短柱高温后的加固行为研究[J].自然灾害学报,2015(6):145-149.
[6]侯敏,董江峰,王清远.CFRP增强纤维再生混凝土轴压短柱性能试验[C]//第22届全国结构工程学术会议论文集第II册,2013:II033-037.
[7]侯敏,王清远,董江峰.碳纤维加固混凝土梁弯曲性能的试验研究[J].中国测试,2012,38(2):21-25.
[8]董江峰,候敏,王清远.玄武岩纤维再生混凝土的基本力学性能[J].四川大学学报,2012,44(增刊2):9-12.
[9]尚建丽.土木工程材料[M].北京:中国建材工业出版社,2010.
[10]董江峰,袁书成,王清远.中空夹层再生混凝土短柱受压性能分析[J].建筑材料学报,2014(1007-9629):04-2607-07.
[11]肖建庄.再生混凝土[M].北京:中国建筑工业出版社,2008.
[12]陶忠,韩林海,黄宏.圆中空夹层钢管混凝土柱力学性能研究[J].土木工程学报,2003,36(2):33-36.
[13]陶忠,韩林海,黄宏.方中空夹层钢管混凝土偏心受压柱力学性能研究[J].土木工程学报,2003,36(2):33-36.
[14]董江峰,袁书成,王清远.震后建筑再生混凝土及其钢管短柱受压性能研究[J].应用力学学报,2014(1000-4939):05-0802-0806.
[15]邱慈长,王清远,石宵爽.薄壁钢管再生混凝土轴压试验研究[J].试验力学,2011,26(1):8-15.