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试验研究了三向受压碳纤维混凝土的力学、电学性能及力电关系。对连接在直流回路中的碳纤维混凝土试件施加单调及循环荷载,处于三向受压状态的试件所受荷载与其电阻同步变化。用同批试件做单向受压试验,对比发现,在相同的轴向压力下,有围压和无围压的碳纤维混凝土的力电效应具有相似的变化趋势,即荷载增大,电阻下降;荷载减小,电阻上升。不同点是,在单调及循环荷载作用下,三向受压混凝土电阻变化率比单向受压混凝土的大,而且电阻幅值更为稳定。
The mechanical, electrical properties and force-electricity relationship of three-direction CFRP were experimentally studied. Monotonous and cyclic loads were applied to the carbon fiber concrete specimens connected to the DC link. The load on the specimen under three-direction compression changed in synchronism with the resistance. The same batch of specimens with one-way compression test, the comparison found that under the same axial pressure, with confining pressure and no confining pressure of the carbon fiber reinforced concrete electrical effect has a similar trend, that is, the load increases, the resistance decreases Load decreases and resistance increases. The difference is that under monotonous and cyclic loading, the rate of change of resistance of concrete subjected to three-dimensional compression is larger than that of unidirectional concrete, and the resistance amplitude is more stable.