Detailed Introduction of Steel Frame Structure
Steel frame structure refers to a structural system that uses beams and columns to support load-bearing and resist lateral forces in the longitudinal and transverse directions. It is generally applicable to small low-rise buildings and large high-rise buildings. And because steel is a very strong building material, steel frame structure is the first choice for factory buildings, warehouses and other load-bearing requirements. The 1-inch steel rod can hang 2000kg-20T heavy objects for translation and lifting at any position without causing damage to the frame. At the same time, another feature of the steel frame structure that is popular with people is that it is extremely flexible. In the face of natural disasters such as heavy snow, strong winds and strong earthquakes, the steel frame structure transforms the force it receives into its own deformation. Any breakage will counteract the impact of the force on the frame without being torn instantly like cement. Another important feature is the plasticity of the steel frame. It means that the steel frame will deform to a certain extent when subjected to a strong external force. The long-term failure of the steel structure allows users more time to respond or escape.
Based on the above characteristics, the ability of steel structure to resist natural disasters is much better than that of concrete buildings, which is why it can be used as the preferred type of construction for many people.
While considering steel structure construction, we also need to pay attention to the negative characteristics of steel, that is, the strength of low-carbon steel (a common building material) will generally decrease at 500 degrees Celsius (930 degrees Fahrenheit), so professional steel structures The manufacturer will take this into full consideration and spray fire-resistant coatings during the casting of steel components. Avoid accidents in which the steel frame structure collapses due to overheating.
Common places for steel frame structure
1. Large-span public buildings: The steel structure is light in weight and strong in load-bearing. Large-span column-free structures can be used, such as: large-span stadiums, baseball fields, indoor skating rinks, etc.
2. High-rise buildings: short construction period, light weight and high strength. For example: high-rise office buildings, exhibition halls, etc.
4. Agricultural buildings: high ability to prevent diseases and insect pests, strong wind and earthquake resistance. For example: cow shed, pig pen, etc.
Steel frame structure construction
The first is the processing of steel frame components. After we receive the corresponding design orders, after the design drawings, when you ask us to perform the production and processing of prefabricated buildings. We will process the relevant components in the factory workshop according to the corresponding drawings, and complete most of the processing work in the factory. This can greatly save the on-site installation time of steel structure buildings, and it also means that a large amount of on-site construction costs can be saved.
The second is the bolted link delivered to the site. When our building components are delivered to the site, the work required on site is to bolt the components according to the drawings. This is the most optimized construction plan on the whole, because many construction work is done off-site, and off-site processing can well eliminate the impact of environmental factors. This effectively speeds up the construction progress. Ensure that the project is on schedule. According to the cycle of our construction, it is generally about 60 days.
Steel structure frame type
KAFA has a variety of options for steel structure buildings. Our common frame options are column-support system, pure frame system, and frame-support system
1. Column-support system
When the number of layers and height of the steel frame structure is large. When load-bearing, wind load, and earthquake are the main factors that endanger the section of prefabricated building columns, it is generally necessary to arrange supports between frame columns. Provide tension between the pillars to ensure the stability of the structure. When subjected to strong winds and strong earthquakes and heavy snow to form lateral and longitudinal pressure on the frame, it can effectively increase the frame rigidity and improve the safety of the building.
2. Pure framework system
During the construction process, due to the functional requirements, when the number of floors and height of the steel structure frame is small, the inter-column support is often not installed. Usually, columns with larger cross-sections are used to construct prefab buildings to withstand strong winds, heavy snow, and strong earthquakes. Horizontal force and longitudinal force reduce the force between layers. This intermediate method is generally used to build a large-span column-free support system.
3. Frame-support system
1. Flexible support and rigid support
Cross bracing is a standard bracing system for roofs, side walls and gables in light steel structure buildings. There are two types of cross supports: flexible support and rigid support. The flexible support members are galvanized steel wire ropes, round steel, strip steel or angle steel. Due to the relatively large length and slenderness of the members, they can hardly be compressed. Under the action of a longitudinal load in one direction, one is pulled, and the other is out of work. When designing a flexible support, pretension can be applied to the wire rope and round steel to offset the pressure generated by its own weight, so that the weight of the member can be ignored in the calculation. The rigid support member is a square tube or a round tube, which can withstand tension and pressure
2.The center support
The steel frame-center support system is one of the commonly used dual lateral force resistance systems for high-rise steel structures. It is currently used in high-rise building structures as an economic, green, and effective seismic structure system.
The eccentric support is relative to the central support, that is, the axis of the support member does not converge with the axis of the beam and column, but a part of the beam section is specially set aside as an energy-dissipating beam section, which is mostly used in areas with high seismic fortification intensity. .