1. Fillet weld between deck plate and trough rib
1-1. Crack propagates into deck Plate
1-2. Crack propagates into bead
2. Fillet weld between transverse rib and trough rib
3. Butt weld connection of trough rib
4. Fillet weld between vertical stiffener and deck plate
If Crack 1-1 penetrates a deck plate, it threatens not only to cause damage on
pavement but also to deteriorate serviceability and safety to the traffic. What is worse is
that Crack1-1 is invisible until it causes visible damage on the pavement. Therefore PWRI
has given priority to investigate this type of fatigue crack. Crack1-2 is also problematic
because the number of this type of crack is increasing, it is fast growing, and it tends to