低强橡胶混凝土单轴受压本构关系的试验研究

Experimental Study on Constitutive Equation of Crumb Rubber Concrete Subject to Uniaxial Compression

对低强橡胶混凝土进行了单轴压缩试验,研究了橡胶掺量和橡胶粒径对混凝土轴心抗压强度的影响,提出了橡胶混凝土强度计算公式.根据实测的应力-应变曲线特点提出了以A为本构参数的单轴受压本构方程.研究发现,A随着橡胶掺量的增加而减小,随着橡胶粒径的减小而减小.最后给出了A的计算公式.

Uniaxial compressive experiment for cruml rubber concrete（CRC） was conducted. The test results show that the uniaxial compressive strength of CRC decreases with the increase of crumb rubber contents. The influence of the size of the crumb rubber on the compressive strength was also investigated. The calculation formula for the strength estimation of CRC is presented. Based on the stress-strain curves, the constitutive equations are established including a parameter A. The constitutive parameter A decreases with the increase of crumb rubber contents, and with the decrease of the size of the crumb rubber. The calculation formula for estimation of value A is established.