Distortion-Induced Fatigue in Steel Bridges: Causes, Parameters, and Fixes

Distortion-induced fatigue in steel bridges is a continuing problem for bridge engineers. Accordingly, a cumulative review and discussion of scholarly literature on this topic as well as focused analytical research aimed at studying bridge system performance when various retrofit techniques are applied to connection details are described herein. Driving forces behind distortion-induced fatigue are presented, including the effects of bridge system geometry and specific detail geometries. Retrofit techniques including positive attachement, back-up transverse stiffeners, slotted connection stiffeners, and removal of lateral brace elements were studied analytically to determine effectiveness. Results from finite element analyses are presented showing relative success of various retrofit techniques. Appropriateness of retrofit techniques under various conditions is disseminated.

[1]  John W. Fisher,et al.  DISTORTION-INDUCED FATIGUE CRACKING IN STEEL BRIDGES , 1990 .

[2]  J. M. Stallings,et al.  REMOVAL OF DIAPHRAGMS FROM THREE-SPAN STEEL GIRDER BRIDGE , 1999 .

[3]  John W. Fisher,et al.  Distortion-induced fatigue cracking of bridge details with web gaps , 1989 .

[4]  Arturo E. Schultz,et al.  Girder Differential Deflection and Distortion-Induced Fatigue in Skewed Steel Bridges , 2006 .

[5]  Terry J Wipf,et al.  RETROFIT SOLUTION FOR OUT-OF-PLANE DISTORTION OF X-TYPE DIAPHRAGM BRIDGES , 1998 .

[6]  Yuan Zhao,et al.  Fatigue Behavior and Retrofit Investigation of Distortion-Induced Web Gap Cracking , 2007 .

[7]  John W. Fisher,et al.  Identifying Effective and Ineffective Retrofits for Distortion Fatigue Cracking in Steel Bridges Using Field Instrumentation , 2006 .

[8]  Joseph W. Tedesco,et al.  Finite element method analysis of bridge girder-diaphragm interaction , 1995 .

[9]  Ron Barrett,et al.  Fatigue Enhancement of Welded Coverplates Using Carbon-Fiber Composites , 2008 .

[10]  S. Emerson,et al.  AASHTO (American Association of State Highway and Transportation Officials). 2001. A Policy on Geometric Design of Highways and Streets. Fourth Edition. Washington, D.C. , 2007 .

[11]  Donald W. White,et al.  Recommended Procedures for Simplified Inelastic Design of Steel I-Girder Bridges , 2004 .

[12]  Arturo E Schultz,et al.  Analysis of Girder Differential Deflection and Web Gap Stress for Rapid Assessment of Distortional Fatigue in Multi-Girder Steel Bridges , 2005 .

[13]  Mark D. Bowman,et al.  Fatigue Behavior of Welded Diaphragm-to-Beam Connections , 2001 .