碳纤维增强复合材料约束矩形空心墩抗震性能试验研究
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摘要
为了研究纤维增强复合材料(FRP)约束钢筋混凝土(RC)空心截面桥墩的抗震性能,对水平单向和双向荷载作用下,剪跨比分别为4和8的CFRP约束RC矩形空心墩进行拟静力试验。分析不同试件的破坏形态、滞回曲线、水平力和位移延性。结果表明:通过CFRP布环包约束试验空心墩的塑性铰区,可降低墩柱的破坏位置、减轻损伤程度,并改变剪跨比较小墩柱的破坏形态;明显改善水平双向荷载作用下剪跨比较大矩形空心墩的滞回性能和延性,但是对水平力的提高小于20%。
In order to study seismic performance of FRP confined RC hollow section bridge pier,quasi-static test was carried out for CFRP confined RC rectangular hollow section bridge pier with shear-span ration of 4 and 8 under horizontal unidirectional and bidirectional loads.Failure mode,hysteretic curves,lateral force and displacement of tested pier columns were analyzed respectively.The results show that through confining plastic hinge region of tested hollow bridge pier by CFRP,the failure location and damage degree are reduced,and the failure mode of tested bridge piers with lower shear-span ratio is changed;the hysteretic performance and ductility of tested bridge piers with bigger shear-span ratio are improved,however,horizontal force is only increased by less than 20%.
In order to study seismic performance of FRP confined RC hollow section bridge pier,quasi-static test was carried out for CFRP confined RC rectangular hollow section bridge pier with shear-span ration of 4 and 8 under horizontal unidirectional and bidirectional loads.Failure mode,hysteretic curves,lateral force and displacement of tested pier columns were analyzed respectively.The results show that through confining plastic hinge region of tested hollow bridge pier by CFRP,the failure location and damage degree are reduced,and the failure mode of tested bridge piers with lower shear-span ratio is changed;the hysteretic performance and ductility of tested bridge piers with bigger shear-span ratio are improved,however,horizontal force is only increased by less than 20%.
引文
[1]Han Qiang,Du Xiuli,Liu Jinbo.The Seismic Damage of HighwayBridges During 2008 Wenchuan Earthquake[J].EarthquakeEngineering and Engineering Vibration.2009,8(2):263-273.
[2]贡金鑫,王雪婷,张勤.从汶川地震灾害看现行国内外桥梁抗震设计方法[J].大连理工大学学报,2009,5(49):739-747.
[3]JTG/T B02-01-2008公路桥梁抗震设计细则[S].
[4]于清,陶忠,高献.FRP约束混凝土柱抗震性能若干问题的探讨[J].地震工程与工程振动,2006,26(4):75-82.
[5]张剑,许广兴.CFRP约束混凝土柱的抗震性能[J].材料工程,2007(2):54-57.
[6]Yeh Y K,Mo Y L,Yang C Y.Seismic Performance ofRectangular Hollow Bridge Columns[J].Journal of StructuralEngineering,2002,128(1):60-68.
[7]Chansawat K,Yim S C S,Miller T H.Nonlinear Finite ElementAnalysis of a FRP-Strengthened Reinforced Concrete Bridge[J].Journal of Bridge Engineering,2006,1(11):21-32.
[8]Pantelides C P,Gergely J,Reaveley L D.Retrofit of RC BridgePier with CFRP Advanced Composites[J].Journal of StructuralEngineering,1999,10(125):1094-1099.
[9]张轲,岳清瑞,叶列平.碳纤维布加固混凝土柱改善延性的试验研究[J].工业建筑,2000,30(2):16-19.
[10]高献,陶忠,杨有福.大轴压比下FRP约束混凝土柱滞回性能试验研究[J].工业建筑,2005,35(9):11-14.
[2]贡金鑫,王雪婷,张勤.从汶川地震灾害看现行国内外桥梁抗震设计方法[J].大连理工大学学报,2009,5(49):739-747.
[3]JTG/T B02-01-2008公路桥梁抗震设计细则[S].
[4]于清,陶忠,高献.FRP约束混凝土柱抗震性能若干问题的探讨[J].地震工程与工程振动,2006,26(4):75-82.
[5]张剑,许广兴.CFRP约束混凝土柱的抗震性能[J].材料工程,2007(2):54-57.
[6]Yeh Y K,Mo Y L,Yang C Y.Seismic Performance ofRectangular Hollow Bridge Columns[J].Journal of StructuralEngineering,2002,128(1):60-68.
[7]Chansawat K,Yim S C S,Miller T H.Nonlinear Finite ElementAnalysis of a FRP-Strengthened Reinforced Concrete Bridge[J].Journal of Bridge Engineering,2006,1(11):21-32.
[8]Pantelides C P,Gergely J,Reaveley L D.Retrofit of RC BridgePier with CFRP Advanced Composites[J].Journal of StructuralEngineering,1999,10(125):1094-1099.
[9]张轲,岳清瑞,叶列平.碳纤维布加固混凝土柱改善延性的试验研究[J].工业建筑,2000,30(2):16-19.
[10]高献,陶忠,杨有福.大轴压比下FRP约束混凝土柱滞回性能试验研究[J].工业建筑,2005,35(9):11-14.
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