Introduction And Development Of Steel Bridges

Steel bridges are bridges that use steel as the main construction material. It has the characteristics of high strength and stiffness, and can reduce the beam height and self-weight compared to concrete bridges.
Introduction
Due to the isotropy, uniform texture and large elastic modulus of steel, the working conditions of the bridge are more consistent with the calculation assumptions. In addition, steel bridges are generally prefabricated in the factory and spliced at the construction site. The construction period is short, easy to process and not affected by the season. . However, steel bridges have poor fire resistance and corrosion resistance, and require frequent inspections, repairs, and high maintenance costs.
develop
A steel bridge is a bridge whose span structure is made of steel. In 1874, the United States built the world's first large steel bridge on the Mississippi River, the St. Louis Steel Arch Bridge. After World War II, steel bridge science and technology improved in the smelting of high-strength and high-quality steel and the improvement of welding technology. The application of orthotropic steel bridge decks and high-strength bolts, as well as the diversification of structural types, have made great progress, prompting the widespread adoption of long-span steel bridges. Due to the high strength and superior performance of steel, and the small ratio between apparent density and allowable stress, steel bridges have greater spanning capabilities. The manufacturing of steel bridge components is most suitable for industrialization. It is easy to transport and install, has a short erection period, and is easy to repair and replace after damage. However, steel is easy to rust and maintenance is difficult.