Steel Structure

Steel structure bridge is a form of bridge, which means that the main load-bearing part of the superstructure of a bridge is made of steel. Steel structure Bridges are the same as Bridges, which are air roads across rivers, lakes and ocean obstacles, among which long-span Bridges are mostly prestressed steel concrete Bridges and steel structure Bridges. The structure of a steel bridge consists of the main bridge along its longitudinal direction. The span between the piers is called the span, the section of the main bridge spanning the main navigable hole is called the main span, and the span is the side span.

What is the steel structure, with the scientific research language, the steel structure should be made of stainless steel plate as the main structure, which is now one of the key structural types of building engineering.Steel structure is made of steel beams, steel columns, steel tube trusses and other components made of steel grains and carbon steel plates. The structure of each component or component is welded by electric welding, anchor screws or rivets in the middle.Features：1, steel toughness, good plasticity, uniform material, high structural reliability, suitable for bearing impact and dynamic load, with good seismic performance. The internal structure of steel is uniform, which is close to isotropic uniform body.2, the material strength is high, its own weight is light, the steel strength is high, the elastic modulus is also high. Compared with concrete and wood, the ratio of density and yield strength is relatively low, so under the same stress conditions, the steel structure has small section, light weight, easy transportation and installation, and is suitable for the structure with large span, high height and heavy load.3, the steel structure sealing performance is good, because the welded structure can be completely sealed, can be made into air tightness, water tightness are very good high-pressure vessels, large oil pools, pressure pipelines and so on.

Bridge Steel bridge, the main bearing structure of the rigid structure of the bridge. The beam and the leg or pier (platform) body form a rigid connection. Due to the consolidation of pier beams, the whole beam and pier are stressed, and the pier not only bears the vertical pressure caused by the load on the beam, but also bears the bending moment and horizontal thrust. The structure can be divided into portal rigid frame bridge, inclined leg rigid frame bridge, T-shaped rigid frame bridge and continuous rigid frame bridge. The main beam of steel structure bridge generally needs to bear positive and negative bending moments, and the cross section should adopt box section. The force of the main beam of continuous steel structure bridge is basically the same as that of continuous beam, and the cross section form and size are basically the same as that of continuous beam.

What is the steel structure, with the scientific research language, the steel structure should be made of stainless steel plate as the main structure, which is now one of the key structural types of building engineering.Steel structure is made of steel beams, steel columns, steel tube trusses and other components made of steel grains and carbon steel plates. The structure of each component or component is welded by electric welding, anchor screws or rivets in the middle.Features：1, steel toughness, good plasticity, uniform material, high structural reliability, suitable for bearing impact and dynamic load, with good seismic performance. The internal structure of steel is uniform, which is close to isotropic uniform body.2, the material strength is high, its own weight is light, the steel strength is high, the elastic modulus is also high. Compared with concrete and wood, the ratio of density and yield strength is relatively low, so under the same stress conditions, the steel structure has small section, light weight, easy transportation and installation, and is suitable for the structure with large span, high height and heavy load.3, the steel structure sealing performance is good, because the welded structure can be completely sealed, can be made into air tightness, water tightness are very good high-pressure vessels, large oil pools, pressure pipelines and so on.

Truss structure is a beam component, it is composed of a number of small cross-section of the "hollow girder", is a statically determinate structure. Because its cross section can be done very high, it has a large bending ability, and the deflection is small, which can be suitable for a larger span than the solid belly beam, and save material, small weight, not stupid.

The grid structure is generally composed of roughly the same lattice or smaller units (repeats). Often used in roof construction. Usually the flat space grid structure is called the grid. The mesh is generally double-layer (to ensure the necessary stiffness), and in some cases can also be made into three layers, and the mesh shell has single and double layers. The flat grid is relatively simple in design, calculation, construction and construction, so it is a good form for the application of large, medium and small span roof system.