Aashto Fatigue Categories: D to E_PRIME
AASHTO LRFD fatigue detail categories A through E-prime with Constant-Amplitude Fatigue Thresholds (CAFT) in ksi and detail constant A (x10^8 ksi^3) for S-N curve fatigue design of steel bridges
| detail category | CAFT ksi (ksi) | constant A e8 ksi3 (ksi3) | detail description | notes |
|---|---|---|---|---|
| D | 7 | 22 | Base metal at short cover plate ends with welds across the plate end; base metal at connection plates welded to plate girders | Cover plate end details; significant stress concentration |
| E | 4.5 | 11 | Base metal at long cover plate ends with welds across plate end; base metal at connection detail with attachment length greater than 4 in parallel to stress direction | Long cover plate terminations; high stress concentration |
| E_PRIME | 2.6 | 3.9 | Base metal at the toe of longitudinal stiffener-to-flange fillet weld; base metal at end of cover plate on box sections; riveted and bolted connections in tension with net section failures | Lowest fatigue resistance; CAFT 2.6 ksi; very sensitive to stress range |
This is a sample. Search the full aashto fatigue categories dataset and 300+ more by creating a free account and accessing the database.
Get started for FREE