FATIGUE OF STEEL BEAMS BY SIMULATED BRIDGE TRAFFIC

A review of field measurements on bridges under traffic showed that a family of Rayleigh probability-density curves can represent the frequency of occurrence of stress ranges of different magnitudes in actual bridges. A particular histogram for a bridge can be approximated by a particular curve from the family. Each curve is defined by: (1) The modal stress range, S sub rm; and (2) a parameter S sub rm, which is a measure of the width of the probability-density curve. Different combinations of S sub rd, which is a measure of the width of the probability-density curve. Different combinations of S sub rm and S sub rd were included. The variable-amplitude data can be related to the constrant-amplitude data by using an effective stress range to represent the variable-amplitude spectrum. The effective stress range is the constant-amplitude stress range that would result in the same fatigue life as the variable-amplitude spectrum, and may be taken as the root-mean-square stress range of the spectrum or calculated from Miner's law.

• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Schilling, C G
  • Klippstein, K H
• Publication Date: 1977-8

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 1561-75
• Serial:
  • Journal of the Structural Division
  • Volume: 103
  • Issue Number: ST8
  • Publisher: American Society of Civil Engineers

Subject/Index Terms

• TRT Terms: Amplitude (Physics); Bridge construction; Bridge foundations; Bridges; Construction; Fatigue (Mechanics); Simulation; Stresses; Traffic
• Uncontrolled Terms: Steel beams
• Subject Areas: Bridges and other structures; Construction; Highways; Operations and Traffic Management;

Filing Info

• Accession Number: 00164891
• Record Type: Publication
• Report/Paper Numbers: ASCE 13123
• Files: TRIS
• Created Date: Nov 23 1977 12:00AM