Preliminary Experimental Study Of Coda Wave In Reinforced Concrete T-beam

Nondestructive testing technology for its characteristics of fast,efficient service in decades in civil engineering field,this article introduces a new method for nondestructive testing,coda wave interferometry,traditional acoustic detection technology is dependent on the direct wave,and the coda wave for medium with high sensitivity,faint change can occur in the concrete structure of small changes to reflect,to detect the change of the direct wave can’t detect.Based on foreign research as a breakthrough point,this paper deeply analyzes the several foreign scholars in coda wave interferometry technology theory and experimental research,and introduce the coda wave principle in detail.Reference the experiment device of scholars both at home and abroad,to our country existing acoustic-waves-monitor instrument research and comparison,establish the test device.Several groups of temperature and stress test of three different types of concrete structures,repetition and refinement of the experimental process,and the problems in the process of experiment are described in detail and solutions,The research object in the coda wave time domain,using the correlation coefficient to describe the similarity degree of two waveforms,process the data by MATLAB software,set up a time domain method of data processing,And in dealing with the stress of the beam data,discovered the symmetric loading,wave velocity changing with symmetrical load symmetry,preliminary observed the coda wave interferometry’s wave velocity space differences,and provide the basis for subsequent research data and reference for the test program.This paper has done research in domestic is a relatively new content,also make an attempt to nondestructive testing technology.This article from the concrete structure of the coda wave experimental research results of the data can be seen that the coda wave test results with the international basic close to the results,experimental results of this paper can study for the back end of potter scientific research workers to provide some new ideas.