抄録
In the design of welded steel bridges, the fatigue strength of welded joints must be considered first of all. But in our country, there are no design specifications for welded steel bridges in which the fatigue strengths are taken into consideration.
For the purpose of contributing to the design of welded steel bridges, the author has performed the fatigue tests on butt welded and fillet welded joints.
This paper is a report on the test results, including (1) the author's emperical formulas for the endurance limits of the joints; (2) the allowable endurance limits for the same joints for our present welding technique, considering differences between shop and field welding and highway and railway bridges; and (3) the comparison between (2) above and the allowable endurance limits specified in other countries.
