What are the advantages and disadvantages of Steel Fabricated Buildings
Steel Fabricated Buildings are becoming more and more popular among people. Their good strength and toughness, lighter weight and good connection make their seismic resistance far beyond the traditional brick-concrete houses. They are roughly as follows:
1. Good shock resistance and poor fire resistance
The same bearing capacity, the steel structure has the smallest section; the same section, the steel structure has the largest bearing capacity. Lightweight steel structure houses are light in weight, and their structural weight is only 1/5 of the weight of traditional brick-concrete structures, which greatly reduces the load received during earthquakes and has high safety. However, the strength of steel is degraded at high temperatures, and the steel structure heats up quickly in a fire, so the exposed part of the steel structure is relatively poor in fire resistance at high temperatures.
Second, prevent insects, moisture, and environmental protection, but pay attention to rust prevention
The steel is protected by deep-layer galvanization, which can prevent corrosion and termites, and can automatically repair the damage of the coating. The treatment of the foundation and foundation of the steel structure is relatively simple, an independent foundation can be used, and a moisture-proof layer is set in the main body and the foundation, and the moisture-proof effect is greatly enhanced. At the same time, light steel structure houses use external heat insulation. The thin-walled light steel structure is warm in winter and cool in summer. Therefore, the steel structure house adopting new wall materials can increase the energy-saving efficiency by 50%. In addition, the steel structure is light in weight, and the dry construction is pollution-free and noise-free, and the steel structure All materials can be recycled, which is very environmentally friendly.
However, steel structure buildings need to pay attention to rust prevention. Especially in areas with high air humidity, anti-rust treatment must be done.
3. It is convenient for space design, but the technical difficulty is relatively high
Steel structure residences use the high strength of steel materials and adopt large-bay column grid layout. At the same time, the material size and thickness are various, which provides designers with a great deal of design whether considering cost or efficiency. The space provides users with the possibility to change the structure according to different purposes. You can arrange your own living space according to your preferences, especially the large overhangs and large bays to create an extraordinary architectural effect.
However, the steel structure residential system is an intricate technical body, which involves supporting systems such as wall materials, roofing materials, kitchen and bathroom systems. There are many requirements for new materials: the structure of light steel houses is equipped with materials such as heat insulation, and new lightweight building materials will generally be adopted. Especially for the external wall structure system, if the traditional wall method is used, the various advantages of the overall assembly of the steel structure house are greatly reduced.
Four, steel frame with reinforced concrete floor slab
The steel structure frame is connected by high-strength bolts, which does not affect the overall strength but also enhances the toughness. When encountering an earthquake, it can absorb the energy of vibration, but enhance its seismic performance. And bolted connection is less prone to rust than welding, which can effectively prevent the contact from disconnecting! Although steel structure houses rely on steel beams and columns for load-bearing, the floor and roof can still be made of reinforced concrete. One is to reduce the tremor when walking, enhance the strength and bearing capacity of the floor, and the second is to have a better waterproof effect!
5. High cost and fast construction speed!
Generally, H-shaped steel is used, which is about 55~65KG/㎡ based on the building area. Some designs are conservative and use a larger amount of steel. If the construction unit package design is adopted, the steel consumption can basically be controlled at 45~50KG/㎡. The profiles of light steel structure houses are mass-produced in the factory, and the skeleton is assembled in the factory and assembled on site. Only 1 on-site guide and 7 or so workers are required to complete the construction of the skeleton of a house within the normal design time.