Welded Repair of Cracks in Steel Bridge Members

摘要

The results of a literature survey on the occurrence of cracking in steel bridge members and repair methods used are documented and presented in the report. In addition, the experience of U.S. bridge operators who were interviewed is presented, and the scope for welded repair is reported. Experimental work included the repair of I beams that had been fatigue-cracked in the laboratory. The welded repairs that were carried out included repairs under dynamic loading and also under conditions of restricted access out of doors. Fatigue testing of the repaired beams showed no decrease in fatigue life. A practical user's manual for repair by welding is included as an appendix to the report.