space frame processing for the space frame production of each process has extremely strict requirements, from the space frame design you need to understand the structural characteristics of the steel structure of the space frame to carry out, its later space frame processing production, are required for the characteristics of the space frame steel structure to strictly control the control, then for the characteristics of the space frame steel structure how much do you know? Here we introduce the main characteristics of steel structure space frame.
1, the material is uniform, more in line with the mechanical calculation assumed just because of the scientific control of smelting and rolling process, its internal structure is more uniform, close to a variety of same-sex, in line with the ideal elastic-plastic body. Therefore, the uncertainty of the calculation is small, and the calculation results are more reliable.
2, plasticity, toughness good plasticity: the steel structure will not suddenly break due to overload under normal conditions, there is a more obvious deformation before destruction, easy to be found. Just a good plasticity can reduce the local peak stress, so that the stress distribution changes slowly. Good toughness: steel structure is suitable for working under dynamic load, so it is more advantageous to use steel structure in earthquake zone.
3, take construction steel, wood and reinforced concrete as an example, respectively calculate their density and strength ratio. From the comparison of the α values of the three materials, it can be seen that the α value just now is the smallest. This shows that, as a load-bearing material, the strength is higher and the weight is lighter. Therefore, the use of just in engineering structures can save materials. If the three materials of reinforced concrete, ordinary steel and cold-formed thin-wall type are used to design a plane truss with the same span and the same load, the reinforced concrete roof truss is the heaviest, the ordinary rigid roof truss is lighter (about 1/3 to 1/4 of the weight of the reinforced concrete roof truss) and the cold-formed thin-wall steel roof truss is the lightest (only 1/10 of the weight of the reinforced concrete roof truss).
Through the example of roof truss design, it can be seen that the same use of steel, such as the form of steel (ordinary steel and cold-formed thin-wall rigid), the weight of the designed structure will also be very different. The light weight of the steel structure and the small foundation load can reduce the cost of the foundation project, and also reduce the workload of hoisting and transportation. Due to the high strength of steel, steel structures are suitable for large-span, high-rise structures, and heavy structures that carry a lot of load. However, the strength of the material is often not fully utilized, because in the design of the component, the section required by the strength condition is small, and the section required by the stability condition or stiffness condition is larger.
The development of structural space frame construction is very rapid, especially the standing of landmark high-rise buildings in some big cities, which has opened a new page for the development of steel structure space frame engineering.
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