Hello everyone,
I am currently designing a steel box girder, which includes longitudinal stiffeners in both the upper and lower flanges. The longitudinal stiffeners are welded on, with no transition radius. In the upper flange, two longitudinal stiffeners run continuously along the entire length of the beam, while three terminate midway along the girder. In the lower flange, five longitudinal stiffeners run continuously along the entire beam length.
I am analyzing the box girder for the fatigue limit state and have used Category E as per AASHTO to check the allowable stress at the termination point, where the three longitudinal stiffeners in the upper flange end. While I believe strongly that Detail Category E is appropriate, I wanted to know which detail category you typically use in similar cases.
Additionally, if your structure does not meet the fatigue limit state requirements for Detail Category E, what adjustments do you recommend? I do not have the option to include a transition radius to improve the detail category.
I would appreciate any insights you can provide.
Regards
I am currently designing a steel box girder, which includes longitudinal stiffeners in both the upper and lower flanges. The longitudinal stiffeners are welded on, with no transition radius. In the upper flange, two longitudinal stiffeners run continuously along the entire length of the beam, while three terminate midway along the girder. In the lower flange, five longitudinal stiffeners run continuously along the entire beam length.
I am analyzing the box girder for the fatigue limit state and have used Category E as per AASHTO to check the allowable stress at the termination point, where the three longitudinal stiffeners in the upper flange end. While I believe strongly that Detail Category E is appropriate, I wanted to know which detail category you typically use in similar cases.
Additionally, if your structure does not meet the fatigue limit state requirements for Detail Category E, what adjustments do you recommend? I do not have the option to include a transition radius to improve the detail category.
I would appreciate any insights you can provide.
Regards
