混凝土柱中石墨水泥砂浆试块的压阻特性研究

Study on the Piezoresistivity of Graphite Cement Mortar Block Embedded in Concrete Column

将石墨水泥砂浆(GCC)试块(40mm×40mm×40mm)预埋混凝土柱(100mm×100mm×300mm)中,利用四电极法研究了其在混凝土柱受到不同幅值循环荷载和单调加载作用下的压阻特性。研究结果表明,GCC试块体积电阻的变化率与混凝土柱的受力状态呈现良好的对应关系。

The piezoresistivity of graphite cement-based composites（GCC） block（40mm × 40mm× 40mm） embedded in the concrete column（100mm× 100mm× 300mm） which is subject to different amplitudes of cyclic loading and monotonic loading are studied by four-electrode method, and the feasibility using GCC block to monitor stress and strain state of concrete column is also discussed. The results show that there is good corresponding relationship between the volume resistance change rate of GCC block and the compressive stress of concrete column.