玄武岩纤维布的力学性能和强度利用率研究
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摘要
针对不同生产厂家、不同编织方式、不同单位面积质量的玄武岩纤维布,开展市场抽样并分成10个试验组。对其进行复合材料拉伸性能试验,获得抗拉强度、弹性模量、伸长率及应力-应变关系等力学性能参数。随后采用其中单向、双向布各一组进行外包加固素混凝土柱的轴压试验,重点分析破坏时环向断裂应变与材性试验极限应变的比值。研究表明:单向布的力学性能及质量稳定性良好且优于双向布,双向布的抗拉强度标准值较单向降低了25%左右;玄武岩纤维布强度利用率随着层数的增加而增加,与编织方式无关;1层、2层加固素混凝土方柱的有效应变系数分别约为21%、40%,加固圆柱分别约为31%、48%。
For different weaving methods,different mass per unit area,different manufacturers of basalt fiber fabricreinforced( BFRP),the sampling survey was conducted and 10 experimental groups were made. The tensile strength,elastic modulus,elongation and stress-strain relationship of BFRP composites were obtained by tensile tests. Then two groups of unidirectional and bidirectional fabric composites were selected and used for the axial compression test of confined concrete cylinders. The results showed that: the mechanical properties and quality stability of unidirectional fabric was well and superior to that of bidirectional fabric. The standard tensile strength of bidirectional fabric composite was 25% lower than that of unidirectional fabric. With same layers,the effect of weaving method had little effect on the strength efficiency of composite materials,and the strength efficiency increased with the increase of confined layers. The efficiency strain factors of single-layer and double-layer of basalt fiber fabric composite confined concrete square columns were 21% and 40% and confined concrete cylinders were 31% and 48%.
For different weaving methods,different mass per unit area,different manufacturers of basalt fiber fabricreinforced( BFRP),the sampling survey was conducted and 10 experimental groups were made. The tensile strength,elastic modulus,elongation and stress-strain relationship of BFRP composites were obtained by tensile tests. Then two groups of unidirectional and bidirectional fabric composites were selected and used for the axial compression test of confined concrete cylinders. The results showed that: the mechanical properties and quality stability of unidirectional fabric was well and superior to that of bidirectional fabric. The standard tensile strength of bidirectional fabric composite was 25% lower than that of unidirectional fabric. With same layers,the effect of weaving method had little effect on the strength efficiency of composite materials,and the strength efficiency increased with the increase of confined layers. The efficiency strain factors of single-layer and double-layer of basalt fiber fabric composite confined concrete square columns were 21% and 40% and confined concrete cylinders were 31% and 48%.
引文
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[14]贡金鑫,魏巍巍.工程结构可靠性设计原理[M].北京:机械工业出版社,2007:68-161.
[15]LAM L,TENG J G.Design-Priented Stress-Strain Model for FRP-Confined Concrete[J].Construction and Building Materials,2003(6):471-489.
[16]LAM L,TENG J G.Ultimate Condition of Fiber Reinforced Polymer-Confined Concrete[J].Journal of Composites for Construction,2004,8(6):539-548.
[17]李涛,黄镜渟,周安,等.玄武岩纤维复材布加固素混凝土方柱轴压性能研究[J].工业建筑,2018,48(2):182-187.
[18]LUDOVICO M D,PROTA A,MANFREDI G.Structural Upgrade Using Basalt Fibers for Concrete Confinement[J].Journal of Composites for Construction,2010,14(5):541-552.
[2]中国国家标准化管理委员会.结构加固修复用玄武岩纤维复合材料:GB/T 26745-2011[S].北京:中国标准出版社,2011.
[3]中华人民共和国住房和城乡建设部.工程结构加固材料应用安全性鉴定规范:GB 50728-2011[S].北京:中国建筑工业出版社,2011.
[4]吴刚,魏洋,蒋剑彪,等.玄武岩纤维与碳纤维加固混凝土矩形柱抗震性能比较研究[J].工业建筑,2007,37(6):14-18,69.
[5]OUYANG L J,GAO W Y,ZHEN B,et al.Seismic Retrofit of Square Reinforced Concrete Columns Using Basalt and Carbon Fiber-Reinforced Polymer Sheets:a Comparative Study[J].Composite Structures,2017,162:294-307.
[6]JIANG S,ZENG X,SHEN S,et al.Experimental Studies on the Seismic Behavior of Earthquake-Damaged Bridge by Using BFRPBars with External BFRP Sheets Jacketing[J].Engineering Structures,2016,106:317-331.
[7]中华人民共和国住房和城乡建设部.纤维增强复合材料建设工程应用技术规范:GB 50608-2010[S].北京:中国计划出版社,2011.
[8]王明明,杨勇新,何新波,等.玄武岩纤维片材拉伸强度标准值的确定[C]//第十八届玻璃钢/复合材料学术年会论文集.北京:2010:96-99.
[9]中国国家标准化管理委员会.定向纤维增强聚合物基复合材料拉伸性能试验方法:GB/T 3354-2014[S].北京:中国标准出版社,2014.
[10]赵红,周兆懿.纤维密度测定方法的研究进展[J].中国纤检,2013(1):63-66.
[11]HODGKINSON J M.Mechanical Testing of Advanced Fibre Composites[M].New York:CRC Press,2000:43-74.
[12]李龙,段跃新,李超,等.双轴向经编织物T700/BMI6421复合材料力学性能[J].复合材料学报,2011,28(6):98-103.
[13]MARGARET P,RICHARD F,RONALD Z.Results of an Interlaboratory Study of the ASTM Standard Test Method for Tensile Properties of Polymer Matrix Composites D3039[J].Journal of Testing and Evaluation,2005(1):27-31.
[14]贡金鑫,魏巍巍.工程结构可靠性设计原理[M].北京:机械工业出版社,2007:68-161.
[15]LAM L,TENG J G.Design-Priented Stress-Strain Model for FRP-Confined Concrete[J].Construction and Building Materials,2003(6):471-489.
[16]LAM L,TENG J G.Ultimate Condition of Fiber Reinforced Polymer-Confined Concrete[J].Journal of Composites for Construction,2004,8(6):539-548.
[17]李涛,黄镜渟,周安,等.玄武岩纤维复材布加固素混凝土方柱轴压性能研究[J].工业建筑,2018,48(2):182-187.
[18]LUDOVICO M D,PROTA A,MANFREDI G.Structural Upgrade Using Basalt Fibers for Concrete Confinement[J].Journal of Composites for Construction,2010,14(5):541-552.