CFRP筋高韧性水泥基复合材料柱抗震性能试验研究
|
摘要
为研究CFRP筋高韧性水泥基复合材料柱的抗震性能,设计制作了3根剪跨比为3的短柱和3根剪跨比为5的长柱,在3种轴压比下进行了低周反复荷载试验,研究了试件的破坏形态,并通过刚度退化、耗能性能以及综合性能指标等方面分析了其抗震性能。试验结果表明:试件在破坏过程中生成大量横向裂缝,没有出现高韧性水泥基复合材料崩裂和剥落的现象,与以往的普通钢筋混凝土柱相比,表现出更高的破坏容许度;对于剪跨比为3和5的CFRP筋高韧性水泥基复合材料柱,在试验轴压比为0.2～0.5的范围内,剪跨比越大或轴压比越大,其抗震性能越好。
In order to study aseismic performance of CFRP-reinforced high toughness cement matrix composite columns, 3 short columns with shear span ratio of 3 and 3 long columns with shear span ratio of 5 were designed and fabricated. Low cycle repeated load tests were conducted for them under three kinds of axial compression ratios, and the specimens' failure modes were studied. Their aseismic performances were analyzed from 3 aspects of stiffness degradation, energy dissipation and comprehensive performance index. The test results showed that a large number of transverse cracks appear on specimens in their failure process, but no disintegrate and peeling off phenomena of high toughness cement matrix composite happen, compared with conventional RC columns, they have a higher damage tolerance; for these columns with shear span ratio of 3 and 5, within the range of the axial compression ratio of 0.2—0.5, the larger the shear span ratio or the axial compression one, the better the aseismic performance.
In order to study aseismic performance of CFRP-reinforced high toughness cement matrix composite columns, 3 short columns with shear span ratio of 3 and 3 long columns with shear span ratio of 5 were designed and fabricated. Low cycle repeated load tests were conducted for them under three kinds of axial compression ratios, and the specimens' failure modes were studied. Their aseismic performances were analyzed from 3 aspects of stiffness degradation, energy dissipation and comprehensive performance index. The test results showed that a large number of transverse cracks appear on specimens in their failure process, but no disintegrate and peeling off phenomena of high toughness cement matrix composite happen, compared with conventional RC columns, they have a higher damage tolerance; for these columns with shear span ratio of 3 and 5, within the range of the axial compression ratio of 0.2—0.5, the larger the shear span ratio or the axial compression one, the better the aseismic performance.
引文
[1] PEREIRA E B,FISCHERG,BARROS J A O.Direct assessment of tensile stress-crack opening behavior of strain hardening cementitious composites (SHCC)[J].Cement Concrete Research,2012,42(6):834-846.
[2] LI V C.Engineered cementitious composites-tailored composites through micromechanical modeling[J].Fiber Reinforced Concrete,1998,78(1):64-87.
[3] LI V C,WANG S,WU C.Tensile strain-hardening behavior of polyvinyl alcohol engineered cementitious composite(PVA-ECC)[J].ACI Materials Journal,2001,98(6):483-492.
[4] TOSUN-FELEKOGLU K,FELEKOGLU B,RANADE R,et al.The role of flaw size and fiber distribution on tensile ductility of PVA-ECC[J].Composites:Part B,2014(56):536-545.
[5] 潘钻峰,汪卫,孟少平,等.混杂聚乙烯醇纤维增强水泥基复合材料力学性能[J].同济大学学报(自然科学版),2015,43(1):33-40.PAN Zuanfeng,WANG Wei,MENG Shaoping,et al.Study on mechanical properties of hybrid PVA fibers reinforced cementitious composites[J].Journal of Tongji University(Natural Science),2015,43(1):33-40.
[6] LI Q,XU S.Experimental research on mechanical performance of hybrid fiber reinforced cementitious composites with polyvinyl alcohol short fiber and carbon textile[J].Journal of Composite Materials,2011,45(1):5-28.
[7] 张旭.高轴压比PVA-ECC柱抗震性能研究[D].长沙:湖南大学,2016.
[8] 邓明科,张辉,梁兴文,等.高延性纤维混凝土短柱抗震性能试验研究[J].建筑结构学报,2015,36(12):62-69.DENG Mingke,ZHANG Hui,LIANG Xingwen,et al.Experimental study on seismic behavior of high ductile fiber reinforced concrete short column[J].Journal of Building Structures,2015,36(12):62-69.
[9] 赵永生,王嘉伟,俞家欢,等.FRP筋增强PPECC轴压柱试验研究[J].混凝土与水泥制品,2013(5):41-45.ZHAO Yongsheng,WANG Jiawei,YU Jiahuan,et al.Experimental research on FRP reinforced PPECC axial compression column[J].China Concrete and Cement Products,2013(5):41-45.
[10] LI V C,WANG S.Flexural behaviors of glass fiber-reinforced polymer (GFRP) reinforced engineered cementitious composite beams[J].ACI Materials Journal,2002,99(1):11-21.
[11] FISCHER G,LI V C.Deformation behavior of fiber-reinforced polymer reinforced engineered cementitious composite (ECC) flexural members under reversed cyclic loading conditions[J].ACI Structural Journal,2003,100(1):25-35.
[12] 中华人民共和国国家标准.建筑抗震设计规范:GB 50011—2010[S].中国建筑工业出版社,2010.
[13] 中华人民共和国国家标准.普通混凝土力学性能试验方法标准:GB/T 50081—2002[S].中国建筑工业出版社,2003.
[14] 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 Yongzhi,ZHANG Jiwen,JIANG Lizhong,et al.A seismic behavior of concrete columns reinforced with CFRP[J].Journal of Central South University(Natural Science),2010,41(4):1506-1513.
[15] 赵鹏展.GFRP管混凝土柱-钢筋混凝土梁节点抗震性能研究[D].大连:大连理工大学,2010.
[16] 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 Lieping,HUANG Yuli.Deformability and new performance indices of flexural members[J].Engineering Mechanics,2005,22(6):28-36.
[17] 龚永智.高性能CFRP筋增强混凝土柱受压及抗震性能的研究[D].南京:东南大学,2007.
[18] MUFTI A A,NEWHOOK J P,TADROS G.Deformability versus ductility in concrete beams with FRP reinforcement[C]//Proceedings of the 2nd International Conference on Advanced Composite Materials in Bridges and Structures.Montreal:ACMBS-II,1996.
[19] 李贺东,徐世烺.超高韧性水泥基复合材料弯曲性能及韧性评价方法[J].土木工程学报,2010,43(3):32-39.LI Hedong,XU Shilang.Research on flexural properties and flexural toughness evaluation method of ultra-high toughness cementitious composites[J].China Civil Engineering Journal,2010,43(3):32-39.
[20] 蔡向荣.超高韧性水泥基复合材料基本力学性能和应变硬化过程理论分析[D].大连:大连理工大学,2010.
[2] LI V C.Engineered cementitious composites-tailored composites through micromechanical modeling[J].Fiber Reinforced Concrete,1998,78(1):64-87.
[3] LI V C,WANG S,WU C.Tensile strain-hardening behavior of polyvinyl alcohol engineered cementitious composite(PVA-ECC)[J].ACI Materials Journal,2001,98(6):483-492.
[4] TOSUN-FELEKOGLU K,FELEKOGLU B,RANADE R,et al.The role of flaw size and fiber distribution on tensile ductility of PVA-ECC[J].Composites:Part B,2014(56):536-545.
[5] 潘钻峰,汪卫,孟少平,等.混杂聚乙烯醇纤维增强水泥基复合材料力学性能[J].同济大学学报(自然科学版),2015,43(1):33-40.PAN Zuanfeng,WANG Wei,MENG Shaoping,et al.Study on mechanical properties of hybrid PVA fibers reinforced cementitious composites[J].Journal of Tongji University(Natural Science),2015,43(1):33-40.
[6] LI Q,XU S.Experimental research on mechanical performance of hybrid fiber reinforced cementitious composites with polyvinyl alcohol short fiber and carbon textile[J].Journal of Composite Materials,2011,45(1):5-28.
[7] 张旭.高轴压比PVA-ECC柱抗震性能研究[D].长沙:湖南大学,2016.
[8] 邓明科,张辉,梁兴文,等.高延性纤维混凝土短柱抗震性能试验研究[J].建筑结构学报,2015,36(12):62-69.DENG Mingke,ZHANG Hui,LIANG Xingwen,et al.Experimental study on seismic behavior of high ductile fiber reinforced concrete short column[J].Journal of Building Structures,2015,36(12):62-69.
[9] 赵永生,王嘉伟,俞家欢,等.FRP筋增强PPECC轴压柱试验研究[J].混凝土与水泥制品,2013(5):41-45.ZHAO Yongsheng,WANG Jiawei,YU Jiahuan,et al.Experimental research on FRP reinforced PPECC axial compression column[J].China Concrete and Cement Products,2013(5):41-45.
[10] LI V C,WANG S.Flexural behaviors of glass fiber-reinforced polymer (GFRP) reinforced engineered cementitious composite beams[J].ACI Materials Journal,2002,99(1):11-21.
[11] FISCHER G,LI V C.Deformation behavior of fiber-reinforced polymer reinforced engineered cementitious composite (ECC) flexural members under reversed cyclic loading conditions[J].ACI Structural Journal,2003,100(1):25-35.
[12] 中华人民共和国国家标准.建筑抗震设计规范:GB 50011—2010[S].中国建筑工业出版社,2010.
[13] 中华人民共和国国家标准.普通混凝土力学性能试验方法标准:GB/T 50081—2002[S].中国建筑工业出版社,2003.
[14] 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 Yongzhi,ZHANG Jiwen,JIANG Lizhong,et al.A seismic behavior of concrete columns reinforced with CFRP[J].Journal of Central South University(Natural Science),2010,41(4):1506-1513.
[15] 赵鹏展.GFRP管混凝土柱-钢筋混凝土梁节点抗震性能研究[D].大连:大连理工大学,2010.
[16] 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 Lieping,HUANG Yuli.Deformability and new performance indices of flexural members[J].Engineering Mechanics,2005,22(6):28-36.
[17] 龚永智.高性能CFRP筋增强混凝土柱受压及抗震性能的研究[D].南京:东南大学,2007.
[18] MUFTI A A,NEWHOOK J P,TADROS G.Deformability versus ductility in concrete beams with FRP reinforcement[C]//Proceedings of the 2nd International Conference on Advanced Composite Materials in Bridges and Structures.Montreal:ACMBS-II,1996.
[19] 李贺东,徐世烺.超高韧性水泥基复合材料弯曲性能及韧性评价方法[J].土木工程学报,2010,43(3):32-39.LI Hedong,XU Shilang.Research on flexural properties and flexural toughness evaluation method of ultra-high toughness cementitious composites[J].China Civil Engineering Journal,2010,43(3):32-39.
[20] 蔡向荣.超高韧性水泥基复合材料基本力学性能和应变硬化过程理论分析[D].大连:大连理工大学,2010.