钢筋混凝土动态粘结滑移声发射特性试验

发布时间：2018-04-24 08:43

本文选题：声发射 + 粘结滑移　；参考：《应用声学》2017年04期

【摘要】：为研究不同加载速率下钢筋混凝土粘结-滑移损伤破坏过程中的损伤特征,对钢筋混凝土粘结试件进行了0.01 mm/s～10 mm/s四种不同速度的拔出试验。采用实时动态的声发射监测技术对整个试验过程进行监测,对试验过程中的声发射信号进行声发射振幅-振铃计数特性及功率谱峰值频率特性分析。结果表明,随着滑移速率的增加,声发射振幅-振铃计数拟合曲线变缓,在0～50 k Hz和100～150 k Hz频率范围内的声发射事件比重分别减小和增加。损伤过程的声发射特性对钢筋混凝土粘结滑移损伤演化规律的研究具有重要的价值。
[Abstract]:In order to study the damage characteristics of reinforced concrete during bond-slip damage under different loading rates, four pull-out tests with 0.01 mm/s~10 mm/s were carried out. The real time dynamic acoustic emission monitoring technique is used to monitor the whole test process. The acoustic emission signal is analyzed by analyzing the characteristics of the acoustic emission amplitude-ring counting and the peak frequency characteristic of the power spectrum. The results show that with the increase of slip rate, the fitting curve of AE amplitude-ring count becomes slower, and the proportion of AE events decreases and increases in the frequency range of 0 ~ 50 kHz and 100 ~ 150 kHz, respectively. The acoustic emission characteristics of the damage process are of great value to the study of the damage evolution law of reinforced concrete bond-slip.
【作者单位】：金陵科技学院建筑工程学院;河海大学土木与交通学院;
【基金】：国家自然科学基金项目(51178162)
【分类号】：TU528

【相似文献】