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Pedestrian bridges are an important part of the urban infrastructure that ensures the safety and comfort of pedestrians. They have a number of distinctive features compared to road bridges. Also, the pedestrian load itself has a significant dynamic component, which can lead to the occurrence of resonant phenomena. Composite reinforced concrete bridges are widely used among the road bridges. This is due to the possibility of including the roadway structure in the act, which increases the load-bearing capacity and reliability of the structure. The same advantages are typical for pedestrian aboveground overpasses. However, pedestrian bridges have a number of features that affect the operation of the composite reinforced concrete structure. It is well-known that the difference between bending structures in civil construction and bending structures in bridge and road construction is the ratio of the rigidness of the concrete and steel parts. The load on pedestrian aboveground overpasses is similar to the temporary load in civil buildings, adjusted for a large dynamic component. But at the same time, the spans of pedestrian aboveground overpasses are similar to the spans of road bridges. In this article, the prospects for the development of composite reinforced concrete structures of pedestrian overpasses are reviewed.

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The issue of optimizing the span structure of road bridges is considered. The proposed method is excluding reinforced concrete from stretched zones and replacing it with steel. The combined work of reinforced concrete in a compressed zone and steel in a stretched zone makes it possible to achieve the most rational solution in terms of material consumption, but leads to additional costs. The article describes the history and experience of using steel-reinforced concrete beams with the span length varying from 12 to 33 m. The advantages of the proposed structure over the typical design of non-diaphragm beam spans are confirmed. Comparison of typical and proposed cross sections of span structures is given. Advanced design of steel-reinforced concrete beams was developed, excluding monolithic seam on concrete slab, which simplifies installation and reduces the complexity of spans. Design solutions are verified by patents of the Russian Federation. Photos of steel-reinforced concrete beams and bridge structures are provided-both built and under construction.