带初始缺陷的拉挤型GFRP管轴压性能试验研究
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摘要
通过对7个管端有竖向裂缝的拉挤型GFRP管进行轴压试验,研究了管端竖向裂缝型初始缺陷的位置及长度对拉挤型GFRP管的轴压性能影响,得到了极限承载力,荷载—位移曲线和应力—应变曲线,并分析了管端裂缝长度和位置对拉挤型GFRP管极限承载力,位移及初始刚度的影响。试验结果表明:管端竖向裂缝型初始缺陷对GFRP管的破坏模式和破坏现象没有明显的影响,主要表现为脆性破坏,且初始缺陷处无明显破坏;初始缺陷的影响主要在荷载作用前期,且对试件初始刚度影响较小;裂缝在中间位置处对试件的极限承载力的影响比裂缝在管端角部试件的极限承载力的影响大。
Based on the axial compression experiment of 7 pultrusion GFRP tubes with vertical cracks,the influence of the location and length of initial defect of pipe ends vertical cracks on the axial performance of pultrusion GFRP tubes was studied,and the ultimate bearing capacity,the load-displacement curve and stress-strain curve were acquired. Meanwhile,the impact of the length and position of pipe end cracks on the ultimate bearing capacity,displacement and initial stiffness of the pultrusion GFRP tubes was also analyzed. The experimental results showed that the initial defect of vertical fracture type of pipe end had no obvious impact on the failure mode and failurephenomenon of GFRP pipes,which was mainly embodied as brittle failure,and the initial defect had no obvious failure. The impact of initial defect was mainly in the early stage of loading and had lesser impact on the initial stiffness. The influence of cracks on ultimate bearing capacity in the middle of the pipes was greater than that in the corner of cracks.
Based on the axial compression experiment of 7 pultrusion GFRP tubes with vertical cracks,the influence of the location and length of initial defect of pipe ends vertical cracks on the axial performance of pultrusion GFRP tubes was studied,and the ultimate bearing capacity,the load-displacement curve and stress-strain curve were acquired. Meanwhile,the impact of the length and position of pipe end cracks on the ultimate bearing capacity,displacement and initial stiffness of the pultrusion GFRP tubes was also analyzed. The experimental results showed that the initial defect of vertical fracture type of pipe end had no obvious impact on the failure mode and failurephenomenon of GFRP pipes,which was mainly embodied as brittle failure,and the initial defect had no obvious failure. The impact of initial defect was mainly in the early stage of loading and had lesser impact on the initial stiffness. The influence of cracks on ultimate bearing capacity in the middle of the pipes was greater than that in the corner of cracks.
引文
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[8]刘小艳,王新瑞,刘爱华,等.海洋工程中GFRP筋耐久性研究进展[J].水利水电科技进展,2012,32(3):86-89.
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[11] CARLOS G,DVILA,CHIARA B. Fatigue life and damage tolerance of postbuckled composite stiffened structures with initial delamination[J]. Composite Structures,2017,161(2):73-84.
[12]李忠学.初始几何缺陷对网壳结构静、动力稳定性承载力的影响[J].土木工程学报,2002,24(1):11-14.
[13]王林,李峰,田冀锋.初始缺陷对耐压圆柱壳结构极限承载力的影响[J].江苏科技大学学(自然科学版),2009,23(1):1-4.
[14]张云发,章青,袁锋华,等.混凝土初始缺陷对其弯曲性能的影响研究[J].混凝土,2015,12(1):41-44.
[15] QIN X,XU Q J. Statistical analysis of initial defect between concrete layers of dam using X-ray computed tomography[J].Construction and Building Materials,2016,125(10):1101-1113.
[16]中华人民共和国国家质量监督检验检疫总局,中国国家标准化管理委员会.纤维增强塑料拉伸性能试验方法:GB/T 1447—2005[S].北京:中国标准出版社,2005.
[17]中华人民共和国国家质量监督检验检疫总局,中国国家标准化管理委员会.纤维增强塑料压缩性能试验方法:GB/T 1448—2005[S].北京:中国标准出版社,2005.
[18]中华人民共和国国家质量监督检验检疫总局,中国国家标准化管理委员会.金属材料室内拉伸试验方法:GB/T228—2002[S].北京:中国标准出版社,2002.
[2] LEES J M. Behavior of GFRP adhesive pipe joints subjected to pressure and axial loadings[J]. Composites Part A,2005,37(8):1171-1179.
[3] HASHIM S A,NISAR J A. An investigation into failure and behavior of GFRP pultrusion joints[J]. International Journal of Adhesion and Adhesive,2013,40(1):80-88.
[4]钱鹏,冯鹏,叶列平. GFRP管轴心受压性能的试验研究[J].天津大学学报,2007,40(1):19-23.
[5]谢攀,许顺德.足尺寸GFRP管约束混凝土轴压试验研究[J].混凝土,2012,24(8):74-77.
[6]李文,张璇,那昱.中空GFRP管—混凝土—钢管组合柱的轴心受压性能研究[J].徐州工程学院学报(自然科学版),2017,32(2):18-25.
[7] ROHAM R,BEHZAD M. Simulation of the long-term hydrostatic tests on Glass Fiber Reinforced Plastic pipes[J]. Composite Structures,2016,136(2):56-63.
[8]刘小艳,王新瑞,刘爱华,等.海洋工程中GFRP筋耐久性研究进展[J].水利水电科技进展,2012,32(3):86-89.
[9]张婧,江小龙,石晓彦,等.具有初始缺陷的裂纹加筋板剩余极限强度分析[J].哈尔滨工程大学学报,2016,37(7):915-922.
[10]王志滨,陶忠,韩林海.初始缺陷对薄壁方钢管混凝土轴压力学性能的影响分析[J].工业建筑,2006,36(11):19-22.
[11] CARLOS G,DVILA,CHIARA B. Fatigue life and damage tolerance of postbuckled composite stiffened structures with initial delamination[J]. Composite Structures,2017,161(2):73-84.
[12]李忠学.初始几何缺陷对网壳结构静、动力稳定性承载力的影响[J].土木工程学报,2002,24(1):11-14.
[13]王林,李峰,田冀锋.初始缺陷对耐压圆柱壳结构极限承载力的影响[J].江苏科技大学学(自然科学版),2009,23(1):1-4.
[14]张云发,章青,袁锋华,等.混凝土初始缺陷对其弯曲性能的影响研究[J].混凝土,2015,12(1):41-44.
[15] QIN X,XU Q J. Statistical analysis of initial defect between concrete layers of dam using X-ray computed tomography[J].Construction and Building Materials,2016,125(10):1101-1113.
[16]中华人民共和国国家质量监督检验检疫总局,中国国家标准化管理委员会.纤维增强塑料拉伸性能试验方法:GB/T 1447—2005[S].北京:中国标准出版社,2005.
[17]中华人民共和国国家质量监督检验检疫总局,中国国家标准化管理委员会.纤维增强塑料压缩性能试验方法:GB/T 1448—2005[S].北京:中国标准出版社,2005.
[18]中华人民共和国国家质量监督检验检疫总局,中国国家标准化管理委员会.金属材料室内拉伸试验方法:GB/T228—2002[S].北京:中国标准出版社,2002.
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