抄録
Shearing stress concentration at reentrant corner in built-up box section is studied using an electrical analogy. In the built-up box section, for truss chord members, this corner is made usually by partial penetration groove or fillet weld at outside because of the difficulty of welding on inside corner. Therefore, a sharp reentrant corner is induced and high stress concentration may occur. In the case of partial connection, besides, the tortional rigidity is reduced and angular twist increases. The test results show that the stress concentration at weld root of partial penetration is about 2 times higher than that of the rolled section and the tortional rigidity decreases about 35% in comparison with that of fully penetrated section.
