基于声振法的钢管混凝土脱空检测技术试验研究

Experiment Study on The Detection for Void at Interface of Concrete-filled Steel Tube Based on Acoustic and Vibration

基于声振原理,研究了瞬态冲击作用下钢管混凝土脱空检测技术。提出了根据声振信号时域与频域图形中能量衰减快慢,振幅、峰值变化等特征对钢管混凝土脱空状况进行判别的方法。通过模型试验分析,证明了该方法的可行性与有效性。展望了今后进一步的研究方向,即可结合其他方法对钢管混凝土脱空程度作出精确定量分析。

Based on principles of acoustic- vibration, study the detection for void at interface of concrete-filled steel tube under transient impulse. And a practical method to judge the disengaging condi- tion is proposed, it works according to the attenuation speed of energy, the amplitude and the changes of peaks in time domain and frequency domain graph of sound and vibration signals. Then through the model test analysis, the feasibility and effectiveness of the method is demonstrated. Finally, some topics which are worth studying further are proposed, that can be combined with other methods to analyse the disenga- ging value accurately and quantitatively.