Cable-stayed bridge: Also called cable-stayed Zhang Qiao, it is a kind of bridge with many cables and the main girder directly pulled on the tower. It is a structural system composed of pressure-bearing tower, tension cables and curved beams. It can be regarded as a multi-span elastic supporting continuous beam with cables instead of piers. It can reduce the bending moment in the beam, reduce the building height, reduce the weight of the structure and save materials. Cable-stayed bridge is mainly composed of pylon, main girder and stay cables.
Suspension bridge: also known as suspension bridge, it refers to a bridge with cables (or steel chains) suspended from the tower and anchored at both sides (or both ends of the bridge) as the main load-bearing members of the superstructure. The geometric shape of cable is determined by the balance condition of force, which is generally close to parabola. Many suspenders are hung on the cable to hang the bridge deck. Stiffening beams are often installed between the bridge deck and the suspenders to form a combined system with cables to reduce the deflection and deformation caused by loads.
Suspension bridge structure
The structural mode of suspension bridge was invented at the beginning of19th century, and many bridges adopt this structural mode. Modern suspension bridges evolved from cable bridges. The scope of application is mainly long-span and super-long-span highway bridges, and today all long-span bridges adopt this structure. It is the main form of long-span bridges.
Suspension bridge is a bridge with cable or chain cable bearing tension as the main load-bearing component, which is composed of suspension cable, bridge tower, anchorage, suspender and deck system. The main load-bearing component of suspension bridge is suspension cable, which mainly bears tension and is generally made of steel (steel wire, steel cable, etc.). ) has high tensile strength. Because the suspension bridge can make full use of the strength of materials and has the characteristics of material saving and light weight, the span of suspension bridge is the largest among all kinds of bridges, and the span can reach 1000 meters or more. The Akashi Strait Bridge in Japan, completed in 19998, has a span of 199 1 m, which is the longest span bridge in the world. The main disadvantage of suspension bridge is its low stiffness, and it is easy to produce large deflection and vibration under load, so corresponding measures should be taken.