Method for detecting steel tube void of concrete filled steel tube (CFST) arch bridge by utilizing transient impact method
A technology of steel pipe concrete and impact method, which is applied in the generation of ultrasonic/sonic/infrasonic waves, and the use of sound waves/ultrasonic/infrasonic waves to analyze solids, etc., which can solve the problems of ultrasonic detection sensitivity and signal-to-noise ratio deterioration, difficult identification, component damage, etc. , to achieve the effect of simple operation and accurate and reliable judgment results
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[0040] See figure 1 , The method for detecting the void of steel pipe of a concrete-filled steel tube arch bridge using the transient impact method is characterized in that it includes the following steps:
[0041] The first step. Layout of measuring points: A plurality of measuring points are set along the axial direction on the top of the concrete-filled steel tube to be tested, and an acceleration sensor 101 is placed on each measuring point;
[0042] Step 2. Set an excitation point on the outer wall near the head end or the tail end of the concrete-filled steel tube, use the excitation device 102 to strike the excitation point horizontally, and measure the acceleration response signal of each measurement point through the acceleration sensor 101; and, A force sensor is arranged in the excitation device 102, so that the vibration point is tapped horizontally by the excitation device 102, and the value of the impact force is measured by the force sensor to quantify the impact forc...
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