FATIGUE EVALUATION OF HIGHWAY BRIDGES USING ULTRASONIC TECHNIQUE

This paper presents an innovative approach for the evaluation of fatigue performance of highway bridges. The proposed method is a combination of analytical and experimental approaches. The steps include identification of critical components and ultrasonic stress measurements using a portable fatigue loading indicator which can be left unattended in the field under normal traffic. Miner's rule is used to compute an effective constant amplitude stress which is applied to estimate the cumulative damage for a given period of time in-terms of equivalent 10 ksi constant amplitude stress cycles. A prototype instrument has been built and tested. This paper describes the methods used by a fatigue loading indicator and discusses some of the preliminary testing results.

• Corporate Authors:

  Technomic Publishing Company, Incorporated

  851 New Holland Avenue, Box 3535
  Lancaster, PA  United States  17604
• Authors:
  • Petro, S H
  • Gangarao, H V
  • Halabe, U B
• Conference:
  • Structural Materials Technology. An NDT Conference.
  • Location: San Diego, CA
  • Date: 1996-2-20 to 1996-2-23
• Publication Date: 1996

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 110-115

Subject/Index Terms

• TRT Terms: Amplitude (Physics); Analysis; Evaluation; Experiments; Fatigue (Mechanics); Fatigue (Physiological condition); Field tests; Highway bridges; Loads; Prototypes; Stresses; Ultrasonics
• Old TRIS Terms: Analytical method; Fatigue loading; Stress cycle; Test results
• Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00725863
• Record Type: Publication
• Files: TRIS
• Created Date: Sep 13 1996 12:00AM