Building Material Prefab House Light Steel Structure Steel Structure

steel structure

Steel structure is mainly composed of steel material structure, is one of the main building structure types. Structure is mainly made of steel and steel plate, steel column, steel truss girder artifacts, such as weld is required between each components or parts, bolt, or rivet connection. Because of its weight is lighter, and the construction is simple, widely used in large factories, stadiums, high-rise, and other fields.

Steel is characterized by high strength, light weight, good integral rigidity and deformation ability, is used for construction of large span and super high, super-heavy buildings is suitable; Homogeneous and isotropic materials is good, is a ideal elastic body, the most in line with the general engineering mechanics basic assumption; Material plasticity and toughness, good can have large deformation, can bear dynamic load; Short construction period; Its high degree of industrialization, high mechanization degree of specialization of production can be performed. Steel structure should be the high strength steel, greatly improve the yield point strength; In addition to new varieties of rolling steel, such as the h-beam steel) (also called wide flange and t-shaped steel and pressed steel plate so as to adapt to the needs of the long-span structure and high-rise building. There are no thermal bridge light steel structure system, building itself is not energy efficient, this technology use clever special fittings to solve the construction problems of hot and cold bridge; Small truss structure make the cable from the wall and fluctuation conduit crossing, convenient construction decoration.

1 material high strength, light weight in their own right Steel, high strength, modulus of elasticity is high. Compared with concrete and wood, the density and the ratio of yield strength is relatively low, so in the same stress under the condition of the steel structure component cross section is small, light weight, easy to transport and install, suitable for large span, high altitude, carrying heavy structure. 2, steel toughness, good plasticity, uniform texture, structure, high reliability Suited to withstand shock and dynamic load, good seismic performance. Homogeneous steel internal organization structure, and is nigh unto isotropic plasmids. Steel structure of the actual performance compared with theory calculation. So the steel structure has high reliability. 3, steel structure manufacture installation high mechanization degree Steel structure components are easy to manufacture, site assembly in the factory. Mechanization of factory manufacture steel structure component products of high precision, high efficiency, site assembly speed, short time limit for a project. Steel structure is one of the most industrialized structure. 4, steel structure, sealed performance is good Due to the welding structure.

Steel structure in use process will be affected by various forms of action (load and uneven settlement of foundation and temperature), so the requirement of steel should have good mechanical properties (strength, plasticity and toughness) and processing performance (cold and hot machining and welding performance), to ensure the structural safety and reliability. Many different kinds of steel, meet the requirements of the steel structure is just a few, such as the Q235 carbon steel, low alloy steel in l6Mn, 20 mn vanadium steel used for high strength bolt (20 MNV), etc.

Performance index 1, strength the strength of the steel index by the elastic limit sigma e, the yield limit of sigma y, and tensile limit sigma u, when the design based on the yield strength of steel, high yield strength can reduce the weight of the structure, save steel, reduce cost.Tensile strength sigma u is able to withstand the maximum stress of steel damage ago, at this time the structure of the lost performance by plastic deformation is very big, but the structure deformation is big but not collapse, satisfy the requirement of structure under severe earthquake resistance.'sigma u/sigma the size of the y value, can be seen as the steel strength parameters.2, plastic steel plastic stress exceeds the yield point, generally refers to has significant plastic deformation without fracture properties.The main indicators of steel plastic deformation ability is elongation delta and reduction of area bits.3, cold bending performance of cold bending steel performance is measured by steel bend produces plastic deformation at room temperature to the crack resistance ability.Cold bending properties of the steel is made of cold bending experiments to test steel under bending.