General Information
Figure 1 shows a truss bridge that is used by motorcycles, bicycles and pedestrians.
| Main span | ≅ 45 m |
| Type | Through truss bridge |
| Truss material | Steel |
| Truss height | ≅ 3 m |
| Deck width | ≅ 3 m |
Bent Caps Connections Failures
Figure 2 shows a schematic lateral view of the bridge.
The vertical alignment consists of one horizontal and two inclined sectors. The continuous through truss is supported by two abutments, two pile bents, and two cantilever piers. The truss-to-bent caps and truss-to-pier caps connections are shown in figures 3 to 5.
The bottom chord is partially embedded in the bent cap, and a crack under the bottom chord region is noticeable.
Bent cap 2 is shorter than bent cap 1 (h1 > h2), and the bottom chord is connected to a steel bearing, which is detached from the bent cap.
The bottom chords are partially embedded in the pier caps, and no cracks are observable.
Truss Members
Figure 6 shows a side view of a truss sector.
The arrangement of the web members consists of zig-zag diagonals with verticals. Upper and bottom chords are made of H-profiles, the verticals are made of circular hollow profiles, and the diagonals are made of a built-up section that consists of two side-by-side placed U-profiles that are joined by intermittent welding, as shown in figure 7.
