预应力碳纤维复材布加固钢筋混凝土方柱轴压性能分析
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摘要
为了分析预应力碳纤维复材布加固钢筋混凝土(RC)方柱的轴压性能,利用有限元分析软件ANSYS对已有试验试件进行了数值模拟,并将数值模拟结果与试验结果进行对比,验证数值模拟的准确性。根据数值模拟结果对预应力碳纤维复材布加固RC方柱的约束机理进行了探讨;分析了CFRP布预应力水平、包裹方式、方柱倒角半径对试件加固效果的影响。结果表明:数值模拟结果与试验值吻合较好;CFRP布预应力水平、包裹范围越大,加固效果越好。增大方柱倒角半径能有效减少角部应力集中。
To research the compressive performance of reinforced concrete( RC) square columns strengthened with prestressed carbon fiber reinforced plastics( CFRP),based on the test data,the finite element analysis on the RC square-column strengthened with CFRP sheets was carried out by ANSYS software. The numerical simulation results were compared with the experimental results to verify the reliability of the numerical simulation. Based on the numerical simulation result,the mechanics of RC square column strengthened with prestressed CFRP sheet were discussed. The influence of the prestressed level of CFRP cloth,the way of wrapping and the chamfering radius of square pillars on the reinforcement effect of the specimen were analyzed. Results showed that numerical simulation results are in good agreement with the experimental data. The bearing capacity and ductility the of the RC squarecolumn strengthened with CFRP sheets has been significantly increased,and increased with the increase of prestress level and the package range of the CFRP. Increasing the chamfer radius of square pillars can effectively reduce corner stress concentration.
To research the compressive performance of reinforced concrete( RC) square columns strengthened with prestressed carbon fiber reinforced plastics( CFRP),based on the test data,the finite element analysis on the RC square-column strengthened with CFRP sheets was carried out by ANSYS software. The numerical simulation results were compared with the experimental results to verify the reliability of the numerical simulation. Based on the numerical simulation result,the mechanics of RC square column strengthened with prestressed CFRP sheet were discussed. The influence of the prestressed level of CFRP cloth,the way of wrapping and the chamfering radius of square pillars on the reinforcement effect of the specimen were analyzed. Results showed that numerical simulation results are in good agreement with the experimental data. The bearing capacity and ductility the of the RC squarecolumn strengthened with CFRP sheets has been significantly increased,and increased with the increase of prestress level and the package range of the CFRP. Increasing the chamfer radius of square pillars can effectively reduce corner stress concentration.
引文
[1]郭子雄,黄群贤,阳刘,等.横向预应力钢套箍加固RC柱研究综述[J].工程力学,2016,33(3):1-9.
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[10]程东辉,王丽,于雁南.预应力碳纤维布加固混凝土方形截面短柱轴心受压试验[J].工业建筑,2013,43(1):49-54.
[11]张蝶.预应力FRP加固钢筋混凝土柱抗震性能的有限元分析[D].北京:北京交通大学,2009.
[12]郭俊平,邓宗才,林劲松,等.预应力钢绞线网加固混凝土圆柱的轴压性能[J].工程力学,2014,31(3):129-137.
[13]卢春玲,魏峰,王强,等.预应力碳纤维复材布加固钢筋混凝土方形截面短柱轴压性能[J].工业建筑,2017,47(5):171-178.
[14]中华人民共和国住房和城乡建设部.混凝土结构设计规范:GB50010—2010[S].北京:中国建筑工业出版社,2010.
[2]郭子雄,黄群贤,阳刘,等.预应力钢板箍加固RC短柱抗剪承载力试验研究[J].工程力学,2010,27(3):138-144.
[3]张波,杨勇,刘义,等.预应力钢带加固钢筋混凝土柱轴压性能试验研究[J].工程力学,2016,33(3):104-111.
[4]周长东,白晓彬,赵锋,等.预应力纤维布加固混凝土圆形截面短柱轴压性能试验[J].建筑结构学报,2013(2):131-140.
[5]周长东,田腾,吕西林,等.预应力碳纤维条带加固混凝土圆墩抗震性能试验[J].中国公路学报,2012,25(4):57-66.
[6]TETSUO Y,MEHDI B,SHOGO F.Emergency Retrofit of Shear Damaged Extremely Short RC Columns Using Pretensioned Aramid Fiber Belts[J].Journal of Advanced Concrete Teehnology,2005,3(1):95-106.
[7]MORTAZAVI A A,PILAKOUTAS K,SON K S.RC Column Strengthening by Lateral Pretensioning of FRP[J].Construction and Building Materials,2003(17):491-497.
[8]YANZ H,PANTELIDES C P,REAVELEY L D.Posttensioned FRP Composite Shells for Concrete Confinement[J].Composites for Construction,2007,11(1):81-90.
[9]NAKADA K,YAMAKAWA T.Axial Compression Tests of RC Columns Confined by Aramid Fiber Belt Prestressing[C]//Fourth International Conference on FRP Composites in Civil Engineering.Switzerland:2008:22-24.
[10]程东辉,王丽,于雁南.预应力碳纤维布加固混凝土方形截面短柱轴心受压试验[J].工业建筑,2013,43(1):49-54.
[11]张蝶.预应力FRP加固钢筋混凝土柱抗震性能的有限元分析[D].北京:北京交通大学,2009.
[12]郭俊平,邓宗才,林劲松,等.预应力钢绞线网加固混凝土圆柱的轴压性能[J].工程力学,2014,31(3):129-137.
[13]卢春玲,魏峰,王强,等.预应力碳纤维复材布加固钢筋混凝土方形截面短柱轴压性能[J].工业建筑,2017,47(5):171-178.
[14]中华人民共和国住房和城乡建设部.混凝土结构设计规范:GB50010—2010[S].北京:中国建筑工业出版社,2010.