Method for positioning sound emission crack source of reinforced concrete member based on corrected wave velocity

• Main Authors: WANG JIACHEN, ZHOU QI, LAN TAO, MEN JINJIE, GUO LINYING
• Format: Patent
• Language: Chinese; English
• Published: 14.01.2020
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention provides a method for positioning a sound emission crack source of a reinforced concrete member based on a corrected wave velocity. The method comprises the steps of: performing four-point bending loading on the reinforced concrete member, performing a lead cutting test, and collecting a sound emission signal by using a sound emission tester; calculating the propagation speeds of sound emission waves in the concrete member in different crack development phases; calculating the corrected sound wave emission wave velocity by considering the influence of the number, the maximum width and the maximum depth of cracks generated in a stress process of the reinforced concrete member on the propagation speeds of sound emission waves; and positioning the positions of the cracks in thereinforced concrete member based on the corrected wave velocity depending on a time difference positioning method. The method provided by the invention is simple and convenient in calculation process,clear in physical meaning