An Impact‐Echo Experimental Approach for Detecting Concrete Structural Faults

Citations Over TimeTop 20% of 2021 papers

Abstract

For the current problem of detection of grouting defects in posttensioned prestressed concrete members, the paper takes a single‐layer arrangement of prestressed pipes as the object of study. The influence law of the main factors such as pipe material, defect size, defect critical surface location, and prestressing reinforcement location on the results of the impact‐echo method for detecting concrete grouting defects was studied. Firstly, the ABAQUS finite element software was used to simulate these factors to obtain the influence law on the detection results, and a modal test was conducted to verify them. The results show that the impact‐echo method can effectively test the location of defects and the degree of burial depth, and the pipe material influences the test results, and the impact of corrugated metal pipe is smaller and more accurate than the PVC pipe. In addition, the greater the plate thickness frequency drift rate, the larger the transverse size of the defect, so the plate thickness frequency drift rate and the measured defect depth are combined to quantitatively determine the depth of the defect.

Related Papers

• → CHOICES BETWEEN POSITIVE AND NEGATIVE REINFORCEMENT DURING TREATMENT FOR ESCAPE‐MAINTAINED BEHAVIOR(2001)78 cited
• → Review on Reinforcement-concrete Bonded Anchorage(2022)1 cited
• → REINFORCEMENT OF INHIBITION(1983)9 cited
• → Echo: Echo: The Adolescent; Echo: The Woman(2004)
• → The Effect of Vicarious Reinforcement on Inappropriate Behavior in an Elementary School Classroom(1975)