基于压电陶瓷的钢管混凝土柱早期强度监测

发布时间：2018-05-09 15:49

本文选题：压电陶瓷 + 智能骨料　；参考：《压电与声光》2016年06期

【摘要】：为研究钢管混凝土柱内部早期强度的增长规律,该文在现有混凝土早期强度监测技术基础上,提出一种基于压电智能骨料的早期强度检测方法。制作钢管混凝土柱试件,通过在钢管混凝土柱内部预埋智能骨料作为传感器和激励器,发射和接收信号,对混凝土早期强度增长过程中传感器采集到的数据进行分析,结果表明,传感器接收信号的电压幅值随着混凝土早期强度的增加而减少,混凝土早期强度在初始的1周内以较快的速度增长,1周后增长速度减慢,28d后强度为1个定值。与此相应,传感器接收信号电压幅值在初始1周内以较快的速度下降,随后下降速度减慢,最后达到稳定,电压幅值变化曲线与早期强度变化曲线相似。利用压电智能骨料能对混凝土早期强度发展过程进行有效监测。
[Abstract]:In order to study the growth rule of early strength in concrete-filled steel tubular columns, this paper presents an early strength detection method based on piezoelectric intelligent aggregate based on the existing early strength monitoring technology of concrete. The concrete filled steel tube (CFST) column specimen is made. The data collected by sensors during the early strength growth of concrete are analyzed by using intelligent aggregates embedded in CFST columns as sensors and exciters to transmit and receive signals. The results show that the voltage amplitude of the received signal decreases with the increase of the early strength of the concrete, and the early strength of the concrete increases at a relatively fast rate in the first one week, and then slows down after one week, and the strength after 28 days is a fixed value. Accordingly, the voltage amplitude of the received signal of the sensor decreases at a faster rate in the first one week, then slows down, and finally reaches stability. The voltage amplitude variation curve is similar to that of the early intensity change curve. Piezoelectric intelligent aggregate can be used to monitor the early strength development of concrete.
【作者单位】：长江大学城市建设学院长江大学结构工程与防灾研究所;长江大学基本建设处;武汉大学;
【基金】：国家自然科学基金资助项目(51378077) 湖北省自然科学基金(创新群体)资助项目(2015CFA029) 湖北省教育厅科技计划重点基金资助项目(D20131205)
【分类号】：TU755.7

【相似文献】