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EXPERIMENT ON BEHAVIOR OF CONCRETE SHORT COLUMNS CONFINED BY POLYETHYLENE FIBER SHEET UNDER AXIAL COMPRESSION
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摘要: 试验研究了聚乙烯纤维布及其与碳纤维、芳纶纤维布混杂约束混凝土圆柱体的轴心抗压性能,重点分析了其破坏形态、承载力、应力-应变曲线和变形性能。试验结果表明:聚乙烯纤维布可显著改善混凝土柱的变形性能;它与碳纤维布混杂约束混凝土柱的承载力比单一聚乙烯纤维布约束柱提高91%,延性系数提高37%,可见,聚乙烯纤维布与碳纤维布具有良好的协同增强增韧效应。Abstract: Based on the experiment on concrete circular columns confined with polyethylene fiber reinforced polymer(PEFRP) sheets and hybrid fiber sheets of PEFRP sheet and carbon FRP (CFRP) sheet, aramid FRP (AFRP) sheet underaxial compression, it is emphasized on analyzing failure configuration, bearing capacity, stress?strain curve and ductility.Results show that PEFRP sheet can significantly improve the ductility of concrete columns; the bearing load of concretecolumn confined with hybrid sheets of PEFRP sheet and CFRP sheet is 91% larger than that of concrete column confinedonly with PEFRP sheets, and its ductility coefficient is 37% larger than that of concrete column confined only with CFRPsheets, which indicates that synergistic effect between PEFRP sheet and CFRP sheet is good.
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Key words:
- PEFRP sheet /
- hybrid /
- confined concrete /
- axial compression properties
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.Lim Yun Mook, Wu Hwai?Chung, Li Victor C. Development of FlexuralComposite Properties and Dry Shrinkage Behavior of High ?PerformanceFiber Reinforced Cementitious Composites at Early Ages. ACI MaterialsJournal, 1999, 96(1): 20-26 .滕锦光, 陈建飞, 史密斯 S T, 等. FRP 加固混凝土结构. 北京: 中国建筑工业出版社,2004: 144-185 .孙秀红, 徐向东, 徐茂波. FRP 约束素混凝土短柱轴压性能的研究. 山东建筑工程学院学报, 2005, 20(5):1-7 .吴.刚, 吕志涛. FRP 约束素混凝土圆柱无软化段时的应力-应变关系研究. 建筑结构学报, 2003, 24(5):1-9 .金熙南, 潘景龙, 刘广义, 等. 增强纤维约束混凝土轴压应力-应变关系试验研究. 建筑结构学报, 2003, 24(4): 47-53 .熊光晶, 姜.浩, 杨建中, 等. 混杂纤维复合材料及其在混凝土梁柱加固中的应用研究. 工业建筑, 2001, 31(9): 11-13 .邓宗才, 阚德新. 高强聚乙烯纤维及其混杂纤维加固混凝土结构性能试验研究报告: [ 研究报告]. 北京: 北京工业大学, 2006 -
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