中文摘要：

试验研究了聚乙烯纤维布增强聚合物（PEFRP）约束混凝土柱体的轴心抗压性能，重点分析了其破坏形态、应力一应变全曲线、峰值应力、峰值应变、变形性能等．试验结果表明：I）相对于未约束混凝土试件，PEA-L-2、PEA-L-3、PEB．L-2、PEB-L．3约束混凝土棱柱体的抗压强度分别提高了10％、35％、27％和30％，峰值应变分别提高了195％、80％、207％和182％；2）PEA-C-2、PEA-C-3、PEB-C-2和PEB-C-3约束混凝土圆柱体的抗压强度分别提高了11％、21％、37％和53％，峰值应变提高了112％、150％、159％和142％．压缩韧性指数方法能评价PEFRP约束柱的变形能力，计算结果表明：PEA对提高柱韧性指数，，效果比PEB显著，而延伸率高的PEB对改善柱后期延性效果更好．

英文摘要：

Based on the experiment on concrete columns confined with polyethylene fiber reinforced polymer （PEFRP） sheets under axial compression, the authors emphasized on analyzing failure configuration, bearing capacity, stress-strain curve and ductility. It is shown that： 1 ） comparing with the specimen without being confined, hearing capacity of concrete quadrate columns confined by PEA-L-2, PEA-L-3, PEB-L-2 and PEB-L-3 improves 10%, 35%, 27% and 30% respectively, peak strain improves 195% , 80% , 207% and 182% respectively; 2） bearing capacity of concrete circular columns confined by PEA-C-2, PEA-C-3, PEB-C-2 and PEB-C-3 improves 11%, 21%, 37% and 53% respectively,peak strain improves 112% , 150% , 159% and 142% respectively. Toughness index could be adopted to evaluate the ductility of constraint column, and the result shows that PEA is better than PEB in improving column toughness index 11 , but PEB which has high elongation rate improve column late ductility effect more apparent.