Method for determining fatigue resistance of all-welded truss bridge

The invention belongs to the field of fatigue analysis of a welded steel structure bridge, and especially relates to a method for determining fatigue resistance of an all-welded truss bridge. The method comprises the following steps: determining a fatigue curve of researched fatigue detail by employing a theoretical method, examining the fatigue curve by an experiment method, correcting the fatigue curve at the fatigue detail, and finally arranging to obtain the fatigue resistance at the fatigue detail. The combination of the determining method and the effect analysis of the fatigue load effect can be used for anti-fatigue design and fatigue life evaluation of the all-welded truss bridge. A technical scheme of the invention is characterized in that compared with the pure theoretical method, the precision of the analysis result in the invention is high, compared with a pure testing method, the investment of a whole work process is less, so that the method is the fatigue resistance assessment method which has the advantages of accuracy and economy.