摘   要：利用石墨烯智能混凝土棱柱体试块，在其中埋置电极形成沿受力方向、正交于受力方向和斜交于受力方向的电极对，在施加弹性阶段的循环荷载情况下，测试其不同方向的电阻变化趋势，对照该方向的应变变化规律，总结石墨烯智能混凝土在不同方向上的压敏响应特征。结果表明，沿受力方向、正交方向和斜交方向的电阻变化规律相似，都随压力的增加而减小，随压力的释放而增加，电阻变化率都在8%左右，这说明它们主要受体积变化的控制，然而，正交于受压方向的压敏性能也受泊松比的影响，使其电阻变化幅度变小，为7.16%。用体积变化率和应变率共同构建的压敏特征模型方程能统一描述三个方向的电阻变化率。

Abstract: Some prism specimens made of graphene smart concrete were casted, in which electrodes were imbedded to constitute three electrode pairs along forcing, transverse and diagonal directions. And then, the resistance and strain along different directions were monitored during loading a cyclic load within elastic regime on the specimens to summarize the piezoresistive characteristics along those directions. The results show that the resistance changing trends on three directions are similar, that is, they all decrease as pressure rising and increase as releasing the pressure. Additionally, the resistance changing amplitudes are all around 8%, which illustrates that their piezoresistance are controlled mainly by volume change. However, the piezoresistance on transverse forcing direction shows small amplitude, which is 7.16%, as to forcing direction due to the tensile strain generated by Poisson’s ratio. The piezoresistance model function built with volume change ratio and strain ratio can unifiedly describe the resistance changes of three directions.