Various bridges Structural forms Advantages and disadvantages

The main forms of bridges are: girder bridges (simply supported girders, continuous girders, rigid bridges), arch bridges (simple system arches, i.e., bare arches, combined system arches), suspension bridges (i.e., cable-stayed bridges), and combined bridges (cable-stayed bridges, combined system arch bridges, etc.).

The advantages of beam bridges are relatively clear forces, construction process is mature, the disadvantage is that the cross-section size is larger, consumables (if the span is large).

Arch bridges have the advantage of beautiful appearance, bearing capacity potential, the disadvantage is the requirement of good foundation conditions (with a large horizontal reaction force), high stability requirements (if the span is large), the construction is more complex (bracket construction, steel pipe concrete arch bridge is much better).

Suspension bridge has the advantage of beautiful appearance, magnificent, the disadvantage is that the rigidity is smaller, anchorages on the foundation requirements are higher (also have a large horizontal force).

The advantage of the combined system bridge is to combine the advantages of a variety of bridge force, the point of truth is that the force is generally not clear enough, not suitable for hand calculations (now the electric calculator does not matter).