Steel structure design steps

The high compressive strength of raw materials, plastic deformation and ductility of stainless steel sheet and other decorative materials such as concrete, diamond and wood, compressive strength is much higher. Therefore, it is especially suitable for prefabricated components and steel structures with large span or very large load. Stainless steel sheet also has the characteristics of plastic deformation and ductility. Plastic deformation is good, the structure is not easy to break due to overweight under the general standard; Good ductility, the structure of the driving force load adaptability. Excellent energy absorption and ductility also give the steel structure excellent seismic grade characteristics. On the other hand, because of the high compressive strength of stainless steel plate, made of prefabricated members of small section and thin wall, force must reach the requirements of stability, compressive strength sometimes can not be fully used. Material symmetry, and the assumption of structural mechanics calculation is more consistent with the internal mechanism of stainless steel plate is close to the homogeneity and anisotropy, and in a certain degree of ground stress is basically completely malleable. Therefore, the concrete bearing capacity of the steel structure and the numerical value of the mechanical foundation are more suitable. The quality of stainless steel sheet can be strictly controlled in the whole process of smelting and cold rolling, and the scope of material fluctuation is small. The production and manufacturing of steel structure is simple, the engineering construction cycle time is short, the raw materials commonly used in steel structure are simple and successful, the production and processing is relatively simple, and can apply the actual operation of machinery and equipment, therefore, a lot of steel structure is generally made of prefabricated components in the systematic metal material structure factory, with high accuracy. Prefabricated components in the construction site assembly, can choose to add simple general anchor bolts and high strength bolts, sometimes can also be assembled in the road and electric welding welding into a large module to lift again, in order to reduce the construction cycle time. In addition, the completed steel structure is also relatively easy to carry out transformation and structural reinforcement, the structure connected with screws can also be based on the need to carry out relocation.

Steel structure, there are low layer and double layer. The low level is generally no more than 3 floors, used for a single villa; Double floors are used for apartment buildings. Over 9 floors is high-rise housing. The 10-12 floor is also known as the garden house. Seismic code GB5001 one to two floors below and 12 floors above the house clearly put forward different provisions. Housing steel structures are generally not suitable for more than 12 stories. There is a significant correlation between the seismic grade characteristics of structures and the shape perception of structure layout. The structure layout is not regular, and it is easy to be damaged during earthquake disasters. Besides the malleable design scheme, the elastoplastic solid layer migration check is also needed. Therefore, the arrangement of structures should conform to the rules of shape perception as much as possible. The layout plan of housing steel structure should be standard and symmetrical. The general layout of housing steel structure is irregular, mainly the irregular plan. For example, the plan looks irregular, L-shaped, etc., especially the reference points of the supporting frame column, which are significantly different. If the large malleable horizontal offset of the building exceeds 1.2 times of the centroid horizontal offset, it is attributed to the irregular plan. In this case, the equipment of the supporting frame column should be adjusted.