Roads and Bridges - Drogi i Mosty
10, 1-2, 2011, 121-140

Ultrasonic testing of stresses with longitudinal wave – experimental application to evaluate truss bridge

Jacek Szelążek Mail
Institute of Fundamental Technological Research Polish Academy of Sciences, Warsaw
Piotr Gutkiewicz Mail
Institute of Fundamental Technological Research Polish Academy of Sciences, Warsaw
Sławomir Mackiewicz Mail
Institute of Fundamental Technological Research Polish Academy of Sciences, Warsaw

Abstract

Paper presents ultrasonic testing of stress changes in elements of steel structure. Basis of ultrasonic method are explained, formulas to calculate stress values based on changes of measured time of flight of ultrasonic pulses are given. Stress evaluation was based on both elastoacoustic effect and deformation of element under test. Ultrasonic probeheads used in measurements and measuring device are described. Results of stress monitoring in two elements of steel railroad bridge are presented – in I-section girders and diagonal truss member. Stress changes registered during passages of rail vehicles of various mass, traveling across the bridge with various velocities, in both directions are presented. Readings taken with two channel equipment during passage of cargo train showed asymmetry of stresses in both girders.

Full Text:

PDF

Ultrasonic testing of stresses with longitudinal wave – experimental application to evaluate truss bridge

  
Szelążek, Jacek; Gutkiewicz, Piotr; Mackiewicz, Sławomir. Ultrasonic testing of stresses with longitudinal wave – experimental application to evaluate truss bridge. Roads and Bridges - Drogi i Mosty, [S.l.], v. 10, n. 1-2, p. 121-140, apr. 2011. ISSN 2449-769X. Available at: <>. Date accessed: 28 Feb. 2024.