A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Detection and Repair of Fatigue Damage in Welded Highway Bridges
The report contains the findings of an extensive laboratory evaluation of the fatigue behavior of welded steel bridge members. This report combines the results of two studies. NCHRP Project 12-15, Detection and Repair of Fatigue Cracking in Highway Bridges, demonstrated that either peening the weld toe or applying a gas tungsten arc remelt process can be successful in improving fatigue strength in the laboratory. Two state-of-the-art reports completed as part of this study are included in Part II of this report. Existing methods of nondestructive inspection are described in Appendix A, and their reliability and adaptability for detection of fatigue cracks in welded highway bridges are evaluated. Typical existing and currently designed welded bridge details are reviewed in Appendix B and those most susceptible to fatigue crack growth are classified. NCHRP Project 12-15(2), Retrofitting Procedures for Fatigue-Damaged Full-Scale Welded Bridge Beams, included further work on peening and the gas tungsten arc remelt process; this study also (1) demonstrated the applicability of these methods in the field, (2) provided new test data on the low stress-range behavior of full-size bridge beams, and (3) examined the fatigue strength of beams with cracks at the ends of transverse stiffeners. Recommendations based on the tests of full-size beams were used to modify the fatigue provisions of the AASHTO Standard Specifications for Highway Bridges during 1978.
Detection and Repair of Fatigue Damage in Welded Highway Bridges
The report contains the findings of an extensive laboratory evaluation of the fatigue behavior of welded steel bridge members. This report combines the results of two studies. NCHRP Project 12-15, Detection and Repair of Fatigue Cracking in Highway Bridges, demonstrated that either peening the weld toe or applying a gas tungsten arc remelt process can be successful in improving fatigue strength in the laboratory. Two state-of-the-art reports completed as part of this study are included in Part II of this report. Existing methods of nondestructive inspection are described in Appendix A, and their reliability and adaptability for detection of fatigue cracks in welded highway bridges are evaluated. Typical existing and currently designed welded bridge details are reviewed in Appendix B and those most susceptible to fatigue crack growth are classified. NCHRP Project 12-15(2), Retrofitting Procedures for Fatigue-Damaged Full-Scale Welded Bridge Beams, included further work on peening and the gas tungsten arc remelt process; this study also (1) demonstrated the applicability of these methods in the field, (2) provided new test data on the low stress-range behavior of full-size bridge beams, and (3) examined the fatigue strength of beams with cracks at the ends of transverse stiffeners. Recommendations based on the tests of full-size beams were used to modify the fatigue provisions of the AASHTO Standard Specifications for Highway Bridges during 1978.
Detection and Repair of Fatigue Damage in Welded Highway Bridges
J. W. Fisher (author) / H. Hausammann (author) / M. D. Sullivan (author) / A. W. Pense (author)
1979
95 pages
Report
No indication
English
Detection and repair of fatigue damage in welded highway bridges
| TIBKAT | 1979
Engineering Index Backfile | 1959
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