混凝土与钢纤维混凝土双轴拉伸与拉压作用的试验研究

对素混凝土与钢纤维混凝土在双轴拉伸与拉压应力作用下的性能进行了试验研究。试验结果表明：混凝土双轴拉拉伸强度低于单轴拉伸强度，在双轴拉压区段抗压强度随拉应力的增加而降低，钢纤维的掺入（掺量不太高）对混凝土的破坏形态影响不很明显，但使混凝土限拉应变有所增加，同时给出了混凝土在双轴拉伸与拉压区段实用的极限强度准则。

Behavior of Plain Concrete and SFRC under Biaxial Tension and Biaxial Tension-Compression

Thin plain concrete and SFRC(Steel Fibre Reinforced Concrete)plates under biaxial tension and biaxial tension-compression were studied experimentally The test results indicate that the strength of concrete under biaxial tension is less than under uniaxial tension,and that under combined compression and tension,the compressive strength decreases as the tensile stress increases The addition of fibers has an insignificant effect on the failure mode of concrete But the limit tensile strain of concrete increases when fibers present A strength criterion under biaxial tension and biaxial tension-compression is recommended for practical application