Fatigue behaviour of web penetration details with a slit in steel girder

Fatigue cracking in steel girder web penetration details is so dangerous that it can break steel girders. Since a number of highway bridges with such web penetration details may exist in Japan, it is of urgent importance to grasp these fatigue strength properties. The purpose of this study is to clarify fatigue behaviour of steel girder web penetration details with a slit through fatigue tests of specimens which have steel girder web penetration details with a slit.