中文摘要：

为了改善高强素混凝土的脆性破坏行为,通过钢纤维与碳纳米管的混掺试验,分别进行了空白试样和高强钢纤维碳纳米管混凝土的立方体和轴心抗压试验,得到了单轴受压应力-应变关系曲线,并由此建立了本构方程。试验结果表明：HSPC的棱柱体试件破坏形态为典型的脆性破坏;HSSFCNRC属于典型的塑性破坏。其次,两者的轴压比（轴心与立方体抗压强度之比）均随强度提高而提高,但HSPC的峰值应变、弹性模量和泊松比均比HSSFCNRC小;第三,由于HSPC的脆性和压力试验机的局限性,所采集到的下降段曲线上数据点远较后者少得多,而且后者也较前者的曲线平缓得多。这些特征指标,均说明了钢纤维与碳纳米管已有效改善了HSPC的脆性破坏行为,可为相关工程应用奠定基础。

英文摘要：

In order to improve the brittleness of high-strength plain concrete （HSPC） , the cube and axial com- pressive tests were carried out for HSPC and high strength steel fibers and carbon nanotubes reinforced con- crete （HSSFCNRC） , HSPC is transformed into HSSFCNRC by being mixed some carbon nanotubes and steel fibers, the stress-strain curves are achieved and the constitutive equations are also established. The test results show that the failure deformations of prism specimens of HSPC are typical brittle failures; while HSSFCNRC destruction process is belonging to a typical plastic damage. Secondly, the axial-pressure ratios of two kinds of concrete （the ratio of the axial and cube compressive strength） increase with concrete strength increased, but the peak strains, elastic modulus and Poisson＇ s ratios of HSPC are smaller than those of HSSFCNRC. Third- ly, because of the brittleness of HSPC and the limitations of a pressure testing machine, the data on the de- cline of the stress-strain curves are collected less than the latter, and the latter is much more gentle than the former. These characteristic indexes of the above are illustrated that the steel fibers and carbon nanotubes have effectively improved the brittle failure of HSPC. Thusly, the above results can lay a foundation for relevant en- gineering applications.