How To Determine Whether The Structure Is Suitable For Using Steel Structure?

As is well known, steel structure grid structures are commonly used in high-rise buildings, large spans, complex structures, heavy loads or cranes, high vibrations, high-temperature workshops, high sealing requirements, and structures that require mobility or frequent disassembly. But how to determine whether the structure is suitable for using steel structure?
Throughout the entire process of steel structure design, it should be emphasized that "conceptual design" is particularly important during the structural selection and layout stage. For some problems that are difficult to make rational analysis or not specified in the specifications, the layout and detailed measures of the control structure can be determined from a global perspective based on the design ideas obtained from the mechanical relationship, failure mechanism, earthquake damage, experimental phenomena, and engineering experience between the overall structural system and subsystems.
2. Using conceptual design can quickly and effectively conceptualize, compare, and select in the early stages. The obtained structural scheme is often easy to calculate by hand, has clear concepts, is qualitatively correct, and can avoid unnecessary tedious calculations in the structural analysis stage.
At the same time, it is also the main basis for determining whether the output data of computer internal force analysis is reliable. No matter how powerful the structural software may be, solid structural concepts and mechanical analysis, as well as reliable manual computing ability, are the essential qualities
4. Steel structures usually have structural types such as frames, flat (wooden) frames, grid frames (shells), cable membranes, light steel, towers and masts.
5. Most of its theories and technologies are mature. There are also some problems that have not been solved, or there is no simple and practical design method, such as the stability of the grid shell.
When selecting structures, their different characteristics should be considered. In light steel industrial buildings, when there is a significant hanging load or moving load, it can be considered to abandon the portal rigid frame and use a grid structure. In areas with high snow pressure on the roof, the roof curve should be conducive to the sliding of accumulated snow (snow load needs to be considered within 50 degrees of the tangent line), such as using a three center circular grid shell for the limestone warehouse shed of Yadong Cement Plant. Nearly half of the total snow load is released. Similar considerations are given to areas with high rainfall.
7. When the building allows, arranging supports in the frame will have better economic efficiency than simply connecting the nodes to the frame. In buildings with a large span of roof covering, a suspension cable or cable membrane structure system with components mainly subjected to tension can be selected. In the design of high-rise steel structures, steel-concrete composite structures are often used. In high-rise buildings with high or irregular seismic intensity, the form of unfavorable seismic resistant core tube and outer frame should not be chosen solely for the sake of economy.
8. It is advisable to choose a structural system with surrounding giant src columns and a supporting frame as the core. More than half of such high-level officials in our country are the former. Disadvantageous to earthquake resistance. The key to fully utilizing material properties is to arrange the load-bearing units as much as possible towards the periphery of the structure, just like hollow bamboo, so external strength and internal weakness are important
9. The layout of the structure should be comprehensively considered based on system characteristics, load distribution, and properties. Generally speaking, the stiffness should be uniform. The mechanical model is clear. Try to limit the influence range of large or moving loads as much as possible, so that they are transmitted directly to the foundation through the line. The distribution of lateral support between columns should be uniform. Its centroid should be as close as possible to the line of action of lateral forces (wind shocks). Otherwise, the torsion of the structure should be considered. The anti side of the structure should have multiple lines of defense. For example, if there is a supporting frame structure, the columns should be able to withstand at least 1/4 of the total horizontal force independently.
10. The layout of the secondary beams in the floor plan of the frame structure can sometimes be adjusted in the direction of load transfer to meet different requirements. Usually, secondary beams are arranged along the short direction in order to reduce the cross-section, but this will increase the main beam cross-section, reduce the net height of the floor, and sometimes the top side columns may not be sufficient. At this time, supporting the secondary beam on a shorter main beam can sacrifice the secondary beam to protect the main beam and columns.
In short, buildings, gyms, opera houses, bridges, television towers, warehouses, factories, residential buildings, and temporary buildings are more suitable for steel structures.