中文摘要：

为了研究不同种类纤维增强聚合物（FRP）管约束超高性能混凝土（UHPC）的轴压性能,对27个约束试件和3个未约束试件进行了轴压试验,测定了应力-应变曲线,探讨了FRP种类、纤维布层数（3、5和7层）等对约束效果的影响。结果表明：试件强度主要与约束比有关,而极限应变与纤维布种类、约束比均有关;约束比增加,强度和极限应变增加;应力-应变曲线与Lam-Teng模型较为接近。基于试验结果回归得到了FRP约束UHPC试件的强度、极限应变预测公式,其预测精度较高。

英文摘要：

In order to study the uniaxial compressive behavior of different types of fiber reinforced polymer（ FRP）confined ultrahigh-performance concrete（ UHPC）,27 FRP-confined UHPC specimens and 3 un-confined specimens were used for performing the uniaxial compressive tests. The stress-strain curves were obtained from the testes. The effects of FRP types and fiber sheets number on confinement effectiveness were analyzed. The test results show that the compressive strength of FRP-confined specimens mainly depends on the confinement ratios,but the ultimate strain not only depend on the confinement ratio,but also depend on the types of FRP. The compressive strength and ultimate strains increase with the confinement ratio. The Lam-Teng model represented the best fit for the stressstrain curves. Based on the test results,the new models for predicting the compressive strength and ultimate strain were proposed,and those models can more accurately predict the confinement responses of FRP-confined UHPC.