土木工程领域所用环氧树脂基碳纤维与工业化生产的碳纤维复合材料中的碳纤维存在状态有一定的差别,即土木工程领域的环氧树脂基碳纤维束内部部分碳纤维实际常处于无环氧树脂基状态.对无环氧树脂基的碳纤维束的力-电性能进行了系统的试验研究,试验结果表明,无环氧树脂基碳纤维束的电阻变化率随应变增大而线性增加.对无环氧树脂基的碳纤维束的破坏过程进行了分析,揭示了断裂碳纤维丝与非断裂碳纤维可能存在搭接和不搭接两种状态,在单根碳纤维丝强度服从Weibull概率分布的基础上,建立了能够描述上述两种状态的变结构碳纤维束的力电本构关系模型.通过计算结果与试验结果的比较,验证了所建立模型的正确性.
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