基于声发射技术的CFRP钢管混凝土受弯破坏过程

摘要

研究了CFRP钢管混凝土在弯曲荷载作用下的破坏过程及声发射变化规律.结果显示,整个破坏过程可分为弹性段、弹塑性段、下降段和软化段四个阶段,而声发射参数变化及波形特征与试件破坏过程表现出较好的对应关系.证明了利用声发射技术能有效地监测CFRP钢管混凝土弯曲过程损伤程度和破坏历程.%The damage process and acoustic emission (AE) characteristic of concrete filled CFRP-steel tubular members under bending load was investigated.The results indicated that the loading process could be divided into four stages including elastic, elastic-plastic, descending and softening stages, and AE parameters and waveforms were showed to explain this process properly.The damage degree and the destroy course of concrete filled CFRP-steel tubular members under bending load can be supervised efficiently through AE technology.