The upper structure of steel arch bridge is mainly composed of arch ring, suspension rod (or arch column), tie rod, bridge beam and other components.

• Section form of main arch ring: steel box arch, steel pipe arch, steel truss arch
• Space posture of two arch ribs: parallel arch ribs, basket arch ribs, butterfly arch ribs
• Position of carriageway system: upper bearing type, middle bearing type and lower bearing type arch bridge
• Layout of boom: parallel vertical boom, inclined boom, mesh boom

Steel arch bridges have both composite system arch bridges and simple system arch bridges. There are several kinds of combined system arch bridges, such as tie arch, loser arch, lange arch and other combined system arch bridges.

Steel arch can be designed into truss arch, box arch, plate arch. Many truss arch bridges are built in foreign countries, and more than ten steel box arch bridges are built in China. Truss arch bridge is an important form of rigid arch bridge with large span.

The main arch of truss arch bridge along the span direction: equal height, variable height.

• Layout of arch rib truss
• Arch axis
• Vector span ratio
• The selection of the height of the vault and arch foot
• Boundary conditions
• Bar section form
• Bar section area

The main load-bearing members of the structure mainly bear axial pressure, but also bear part of the bending moment, and the eccentric compression members are mainly compressed.

Section forms: box, pipe, truss type. Trussed arch rib has light weight, greater span capacity and good economy.

It is a force transfer component, which transfer the deck load to the arch rib of the bearing member, the boom is mainly an axial tension member.

Types: The rigid boom is made of multi-purpose steel pipe or section steel and can withstand pressure. The flexible boom is made of high-strength steel wire bundle or steel strand, which can only be stretched, convenient construction and beautiful appearance.

For the non-thrust arch, the thrust of the arch is borne by the tie rod, and the tie rod bears the larger axial tension.

Types: rigid tie rod, flexible tie rod.

To ensure the transverse stiffness and stability of the two arch ribs and withstand the transverse horizontal forces acting on the arch ribs, bridge deck and boom, it is necessary to set the transverse supports.

The cross brace can greatly improve the out-of-plane stiffness and torsional stiffness of the whole bridge, but basically do not improve the in-plane stiffness.

• Iconic Landmarks
• Highway Overpasses
• Railway Bridges
• Pedestrian Bridges

• Strength and Durability
• Long Spans
• Rapid Construction
• Versatility and Adaptability

• Arch Shape: The most prominent feature of steel arch bridges is their arch-shaped design.
• Steel Construction: Steel arch bridges are constructed using steel as the primary material.
• Deck and Roadway: The bridge deck is the surface that carries the load of vehicles, pedestrians, and other traffic.