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Structural characteristics of Steel Truss Pedestrian Bridge
Advantages of Steel Truss Pedestrian Bridges
● Double-Row Single-Layer Bailey Bridge
● Double-Row Single-Layer Reinforced Bailey Bridge
● Double-Row Single-Layer Bailey Bridge
● Double-Row Single-Layer Reinforced Bailey Bridge
● Double-Row Single-Layer Bailey Bridge
● Double-Row Single-Layer Reinforced Bailey Bridge
The main components of the Steel Truss Pedestrian Bridge include the upper chord, the lower chord and the belly bar. The form of the belly bar is divided into oblique bailey bar and straight bailey bar. Because the length of the rod itself is relatively large, although the connection between the rods may be "solid", the actual rod end bending moment is generally small, so the design analysis can be simplified as "hinged". For simplified calculations, the rods are "two-force rods" that withstand pressure or tension.
Steel Truss Pedestrian Bridges have greater under clearance than arch Bridges, and smaller spans can be built under the same clearance requirements.
The structural form of the Steel Truss Pedestrian Bridge makes it have good mechanical properties and can effectively disperse and transfer loads.
The Steel Truss Pedestrian Bridge, commonly known as the Bailey Bridge, is a prevalent structural support system utilized extensively in bridge construction and maintenance. Depending on specific engineering requirements, Bailey Bridges can be configured in various ways, including double-row single-layer and double-row single-layer reinforced types. Below are the distinctions between these two configurations:
This configuration comprises two rows of Bailey panels, interconnected by linking rods to form a stable support system. Each row typically consists of standard Bailey panels, suitable for supporting requirements under general load conditions.
Similarly, this configuration consists of two rows of Bailey panels, but with a difference in panel selection. Reinforced Bailey panels generally possess higher load-bearing capacity and enhanced structural stability. These panels may be strengthened through increased material thickness or modified structural designs to meet higher loads or stricter engineering demands.
Standard Bailey panels in this configuration have an allowable bending moment of 788 kN·m, suitable for projects like light rail viaducts, fulfilling certain load requirements.
Reinforced Bailey panels offer a higher allowable bending moment. For instance, reinforced panels in this configuration can have an allowable bending moment of 3375 kN·m. This implies that reinforced Bailey bridges maintain structural stability and safety under greater loads.
Suitable for general bridge construction and maintenance projects, meeting regular load demands and construction specifications.
More appropriate for projects requiring higher load-bearing capacity and more stable structures, such as bridges for heavy vehicle traffic or in situations with complex geological conditions and high loads.
The primary differences between double-row single-layer Bailey bridges and double-row single-layer reinforced Bailey bridges lie in the type of Bailey panels and their load-bearing capacity. Reinforced Bailey panels, through increased material thickness or modified structural designs, enhance their mechanical properties, enabling them to maintain structural stability and safety under greater loads. The choice between these types depends on specific engineering needs and load conditions.
