全CFRP筋混凝土柱低周反复荷载试验研究
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摘要
考虑轴压比、剪跨比和配箍形式的影响,对6根全CFRP筋混凝土柱进行低周反复荷载试验,通过分析滞回曲线、骨架曲线、位移延性系数和耗能能力等特征,研究CFRP筋混凝土柱的抗震性能。试验结果表明:CFRP筋混凝土柱具有较强承载能力和变形能力;轴压比和剪跨比是影响试件抗震性能的主要因素,轴压比越小,试件的变形和耗能能力越强,刚度退化越平缓,剪跨比越大,试件的变形能力越强;通用屈服弯矩法计算得到的延性系数能够较好反映CFRP筋混凝土柱的延性,轴压比越小、剪跨比越大,试件的延性越好;新型螺旋式矩形箍筋在试件延性及耗能方面表现良好,可以应用于工程实际。
To study aseismic behavior of concrete columns reinforced with CFRP bars, six concrete columns were tested underhorizontal cyclic loading, hysteretic curves and skeleton curves were analyzed and ductility coefficient and energy dissipation werecalculated, considering the influences of axial compression ratio, shear span ratio and the stirrup type. The experimental results showthat the specimens have good bearing and deformation capacity; axial compression ratio and shear span ratio obviously affect the aseismicbehavior-the higher capacity of deformation and energy dissipation the specimens have, the gentler the rigidity curves tend to be, the higherthe shear span ratio will be, the higher capacity of deformation they have; the ductility coefficient calculated by yield bending momentmethod reflects that the ductility of the specimens is good and the ductility of the specimen becomes better as the axial compression ratiodecreases and the shear span ratio increases; the new type of spiral square stirrups which show excellent performance in the capabilityof ductility and energy dissipation can be used in practice.
To study aseismic behavior of concrete columns reinforced with CFRP bars, six concrete columns were tested underhorizontal cyclic loading, hysteretic curves and skeleton curves were analyzed and ductility coefficient and energy dissipation werecalculated, considering the influences of axial compression ratio, shear span ratio and the stirrup type. The experimental results showthat the specimens have good bearing and deformation capacity; axial compression ratio and shear span ratio obviously affect the aseismicbehavior-the higher capacity of deformation and energy dissipation the specimens have, the gentler the rigidity curves tend to be, the higherthe shear span ratio will be, the higher capacity of deformation they have; the ductility coefficient calculated by yield bending momentmethod reflects that the ductility of the specimens is good and the ductility of the specimen becomes better as the axial compression ratiodecreases and the shear span ratio increases; the new type of spiral square stirrups which show excellent performance in the capabilityof ductility and energy dissipation can be used in practice.
引文
[1]李树新,李贵春.FRP筋性能及在混凝土结构中的应用[J].河北建筑工程学院学报,2006,24(1):10-12.Li Shu-xin,Li Gui-chun.Function of FRP steel and its application in the concrete structure[J].Journal of Hebei Institute of Architectural Engineering,2006,24(1):10-12.
[2]叶列平,冯鹏.FRP在工程结构中的应用与发展[J].土木工程学报,2006,39(3):24-36.Ye Lie-ping,Feng Peng.Applications and development of fiber-reinforced polymer in engineering structures[J].China Civil Engineering Journal,2006,39(3):24-36.
[3]周先雁,王兰彩.碳纤维复合材料(CFRP)在土木工程中的应用综述[J].中南林业科技大学学报,2008,27(5):26-32.Zhou Xian-yan,Wang Lan-cai.Summary of CFRP application in civil engineering[J].Journal of Central South University of Forestry&Technology,2008,27(5):26-32.
[4]Sharbatdar M K.Concrete columns and beams reinforced with FRP bars and grids under monotonic and reversed cyclic loading[D].Ottawa,Canada:Ottawa Carleton Institute for Civil Engineer,2003:22-367.
[5]Saatcioglu M,Grita M.Seismic performance and design of concrete columns confined with CFRP grids[C]//Teng Jin-guang.FRP Composites in Civil Engineering:CICE 2001.Hong Kong,China:Elsevier,2001:1227-1234
[6]龚永智,张继文,蒋丽忠,等.高性能CFRP筋混凝土柱的抗震性能[J].中南大学学报:自然科学版,2010,41(4):1506-1513.Gong Yong-zhi,Zhang Ji-wen,Jiang Li-zhong,et al.Aseismic behavior of concrete columns reinforced with CFRP[J].Journal of Central South University:Science and Technology,2010,41(4):1506-1513.
[7]马颖.钢筋混凝土柱地震破坏方式及性能研究[D].大连:大连理工大学,2012:46-50.
[8]冯鹏,叶列平,黄羽立.受弯构件的变形性与新的性能指标的研究[J].工程力学,2005,22(6):28-36.Feng Peng,Ye Lie-ping,Huang Yu-li.Deformability and new performance indices of flexural members[J].Engineering Mechanics,2005,22(6):28-36.
[9]蒋凤昌.锈蚀钢筋混凝土柱承载力评估与加固修复研究[M].上海:同济大学出版社,2012:140-149.
[10]窦志明.高强混凝土柱的抗震性能研究[D].广州:广州大学,2012:31-33.
[2]叶列平,冯鹏.FRP在工程结构中的应用与发展[J].土木工程学报,2006,39(3):24-36.Ye Lie-ping,Feng Peng.Applications and development of fiber-reinforced polymer in engineering structures[J].China Civil Engineering Journal,2006,39(3):24-36.
[3]周先雁,王兰彩.碳纤维复合材料(CFRP)在土木工程中的应用综述[J].中南林业科技大学学报,2008,27(5):26-32.Zhou Xian-yan,Wang Lan-cai.Summary of CFRP application in civil engineering[J].Journal of Central South University of Forestry&Technology,2008,27(5):26-32.
[4]Sharbatdar M K.Concrete columns and beams reinforced with FRP bars and grids under monotonic and reversed cyclic loading[D].Ottawa,Canada:Ottawa Carleton Institute for Civil Engineer,2003:22-367.
[5]Saatcioglu M,Grita M.Seismic performance and design of concrete columns confined with CFRP grids[C]//Teng Jin-guang.FRP Composites in Civil Engineering:CICE 2001.Hong Kong,China:Elsevier,2001:1227-1234
[6]龚永智,张继文,蒋丽忠,等.高性能CFRP筋混凝土柱的抗震性能[J].中南大学学报:自然科学版,2010,41(4):1506-1513.Gong Yong-zhi,Zhang Ji-wen,Jiang Li-zhong,et al.Aseismic behavior of concrete columns reinforced with CFRP[J].Journal of Central South University:Science and Technology,2010,41(4):1506-1513.
[7]马颖.钢筋混凝土柱地震破坏方式及性能研究[D].大连:大连理工大学,2012:46-50.
[8]冯鹏,叶列平,黄羽立.受弯构件的变形性与新的性能指标的研究[J].工程力学,2005,22(6):28-36.Feng Peng,Ye Lie-ping,Huang Yu-li.Deformability and new performance indices of flexural members[J].Engineering Mechanics,2005,22(6):28-36.
[9]蒋凤昌.锈蚀钢筋混凝土柱承载力评估与加固修复研究[M].上海:同济大学出版社,2012:140-149.
[10]窦志明.高强混凝土柱的抗震性能研究[D].广州:广州大学,2012:31-33.
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