The Performance Of The Suspension Bridge

According to the rigidity of the bridge deck system, suspension bridges can be divided into flexible suspension bridges and rigid suspension bridges. The deck system of a flexible suspension bridge generally does not have stiffening beams, so the rigidity is small. Under the action of vehicle load, the bridge deck will undergo S-shaped deformation with the change of the suspension cable shape, which is not good for driving, but its structure is simple and general. Used as a temporary bridge. The deck of the rigid suspension bridge is strengthened by stiffening beams with greater rigidity. The stiffening beam can bear the vertical load with the overall structure of the bridge. In addition to the above forms, in order to enhance the rigidity of the suspension bridge, the double-chain suspension bridge and the oblique boom suspension bridge can also be used, but the structure is more complicated.

A bridge whose deck is supported on a suspension cable (usually called Dalan) is called a suspension bridge. The English name is Suspension Bridge, which means "suspended bridge", so it is also translated as "suspension bridge". In most cases, the suspension system of "suspension bridge" is made of "cable", so it is translated as "suspension bridge", but in some cases, "cable" is also made of rigid rods or key rods, so the translation "suspension bridge" cannot cover this A type of bridge. In contrast to arch ribs, the cross-section of the suspension cable only bears tensile forces. Simple suspension bridges that are only used for walking by people and animals often lay the deck directly on the suspension cables. Suspension bridges with modern vehicles are not suitable. In order to maintain a certain level of straightness of the bridge deck, the bridge deck is hung on the suspension cables with slings. Unlike arch bridges that use rigid arch ribs as load-bearing structures, they use flexible suspension cables as load-bearing structures. In order to prevent the bridge deck from deforming along with the suspension cables when vehicles pass by, modern suspension bridges are generally equipped with rigid beams (also known as stiffening beams). The bridge deck is laid on rigid beams, which are suspended from suspension cables. The suspension cables of modern suspension bridges are generally supported on two tower columns. The top of the tower is provided with a saddle-shaped support for supporting the suspension cable. The end of a suspension cable that bears a large tensile force is fixed in the foundation by anchors, and some are fixed to the end of a rigid beam, which is called a self-anchored suspension bridge.