目的 利用压电智能骨料对钢管混凝土柱的混凝土浇筑密实性进行检测,实现混凝土密实性的定量评判.方法 将智能骨料作为基本的检测元件埋置在构件内部,每相邻两块智能骨料之间构成一个检测对.采用一发一收互动法,在试件中发射并接收信号,以欧式距离作为密实性的评价指标,比较同一检测对中的两个智能骨料所接收到的对方发射信号的差异程度,判断这位于两个骨料间的混凝土是否存在不密实.结合实际工程,对试验结果进行了验证.结果 根据欧式距离D3和D6数值偏大,推断出隔板位置密实性较差,这一结果得到了传统超声检测方法的验证.结论 笔者提出的方法具有良好的有效性和可靠性,能有效地检测出钢管混凝土的不密实性,应用于实际工程切实可行.%A new method was proposed in the paper to detect the density of concrete filled steel tube columns. The smart aggregate was the basic unit to be buried into concrete. The two adjacent units were used as a detecting pair. Launch-receive interactive method was employed to launch and receive signals. Euclidean distance was applied as the measurement of density to decide the signals difference in a detecting pair to e-valuate whether the specimen was defective. At last,a proving test in situ was conducted. The experimental data can be concluded that the density in the location of specimen clapboard is worse. The result is agreed with traditional ultrasonic detection method. The results showed that the proposed method was effective to detect the density of concrete filled steel tube,and it is possible to be used in civil engineering.
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