General Information

Figure 1 shows a cable-stayed bridge that is used by motorcycles, bicycles and pedestrians.

Cable-stayed bridge.
Cable-stayed bridge over a river
Type Single-span cable-stayed bridge
Main span ≅ 140 m
Deck width ≅ 2 m
Girder Steel twin I-girder
Pylon Reinforced concrete (A-longitudinal shaped)
Stay cable arrangement Radial (two cable planes)

Anchorage Failure

Figure 2 shows half main span.

Half main span.
Half main span of a cable-stayed bridge

The numbers indicate the position of a girder anchorage. Figure 3 shows half main span without anchorage 2.

Half main span without anchorage 2.
Cable-stayed bridge with a failed girder anchorage

The failure (on one side only) did not cause a progressive collapse. Figure 4 shows a further view of the bridge without anchorage 2.

Main span without anchorage 2.
Girder deformation of cable-stayed bridge without a girder anchorage

Figure 5 shows a schematic partial three-dimensional view of an anchorage.

Girder anchorage using a multi-bent round bar

The anchorage consists of a multi-bent steel round bar and 2 nuts. Figure 6 shows a side view of the failed anchorage.

Failed anchorage.
Failed girder anchorage

The top region of the multi-bent round bar failed. Figure 7 shows a schematic partial three-dimensional view of the unfailed and failed anchorage.

Unfailed Failed
 Unfailed girder anchorage; failed girder anchorage
  • What are some possible failure reasons?
    What are the main structural consequences?