中文摘要：

通过对不掺硅灰的新型超高性能混凝土的单轴压缩和单轴拉伸试验研究,获得了UHPC轴压应力-应变曲线和轴拉荷载-位移曲线。试验表明相比普通混凝土,UHPC轴压应力-应变曲线具有较长的线性段,UHPC具有良好的受压变形性能;UHPC开裂后裂缝间的钢纤维开始发挥作用,轴拉应力随裂缝宽度的增大和钢纤维的拔出而逐渐减小。基于试验并结合已有研究成果,建立了UHPC单轴受压和单轴受拉的本构方程,可供设计参考。

英文摘要：

Based on uniaxial compression and uniaxial tension tests of a new kind of ultra- high performance concrete which mixes had no silica fume,the axial compression stress- strain curves and axial tension load- displacement curves were obtained.The test results show that UHPC has excellent ability of compression deformation and which axial compression stress- strain curve has a longer linear segment than ordinary concrete.The steel fibers begin to bear tensile stress after UHPC cracking,the axial tensile stress decreases gradually with the opening of crack width and the increasing quantities of pulled- out of steel fibers.Finally based on the test and existing research,the UHPC axial compression and tension stress- strain constitutive are established,which can be used as a reference for design,