General Information

Figure 1 shows a single-lane road beam bridge that is used by not heavy vehicles.

Beam bridge.
Beam bridge over a river
Main span ≅ 10 m
Girder Prestressed concrete beam/reinforced concrete solid slab

Solid Slab Sector

Figure 2 shows a schematic three-dimensional view of the bridge.

Beam bridge.
Three-dimensional drawing of a beam bridge with a passing place

The bridge has eight equal spans and a passing place (spans 4 and 5). The girder of span 4 consists of a solid slab, while the girder of the remaining spans consists of a prestressed concrete beam. The girders are supported by three- and four-pile bents; the latter are installed in the passing place sector. Figure 3 shows the passing place sector, while figure 4 shows a side view of it.

Beam bridge with solid slab sector.
Passing place of a single-lane beam bridge
Beam bridge with solid slab sector.
Side view of a passing place
  • What are some possible reasons for the solid slab span?

    • Figure 5 shows a side view of spans 3 and 4.

    Prestressed beam and solid slab.
    Prestressed concrete M-beam girder and RC soild slab girder

    The height of the prestressed beam (hb) is greater than the thickness of the solid slab (hs).

  • Is the load capacity of spans 4 and 5 the same?

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