Development thinking of prefabricated steel structure buildings

【Abstract】Since 2015, the country has successively issued a series of policies to encourage the development of prefabricated buildings. The term prefabricated building is gradually familiar to the public. In order to help everyone better grasp the relevant knowledge of prefabricated buildings and understand the related For the information, the editor organized and shared the relevant content of 'Assembly | Some Thoughts on the Development of Prefabricated Steel Structure Buildings'. Some thoughts on developing prefabricated steel structure buildings: 1. First, two misunderstandings in understanding should be clarified

1. Equating prefabricated buildings with prefabricated concrete structures (PC)

Prefabricated buildings are made of Buildings assembled from prefabricated components and parts at the construction site. The structural forms of prefabricated buildings include concrete structures, steel structures, wood structures and various types of composite structures. In recent years, many people have equated prefabricated buildings with prefabricated concrete structures (PC), not only ignoring prefabricated buildings of steel structure, wood structure and composite structure types, resulting in a greatly reduced range of prefabricated buildings that can be identified; Only focusing on the assembly of the main structure, not paying attention to the assembly of the outer protection system, interior decoration and equipment pipeline system, resulting in a poor sense of identity for prefabricated buildings. 2. All steel structure buildings are identified as prefabricated buildings. The main structure of steel structure buildings is indeed assembled, but if only the assembly of the main structure is considered, the traditional construction methods are still used for the outer protection and interior installation systems, resulting in The advantages of good construction quality and high construction precision of steel structure buildings have not been fully exerted and cannot be called prefabricated steel structure buildings. Only attaching importance to the research and development of steel structures, ignoring the research and development of matching external protection and interior parts, this is the main reason for the slow development of prefabricated steel structure houses! Second, the development of prefabricated steel structure buildings should strengthen prefabricated wall panel parts At present, the main structure technology in steel structure buildings is relatively mature, while the research on the matching outer protection and inner partition wall technology is relatively lagging behind; the outer walls and inner partition walls of block masonry are not suitable for steel structure buildings. It is also not in line with the development direction of prefabricated buildings. 1. Exterior wall panels The prefabricated exterior protection systems that are widely used in steel structure public buildings include curtain walls, PC hanging panels, etc.; but due to their relatively high cost, they can only be used in high-end residential projects. Only by strengthening the research and development of composite external wall panels and their connection technology, can the current situation of a large number of block masonry in steel structure houses be changed, so as to avoid common problems such as external wall cracking and water seepage. In order to promote the popularization and application of prefabricated outer protection systems in residences, it is necessary to strengthen the research and development of products that integrate outer protection and insulation, decoration, or products that combine outer protection and insulation (such as ALC slats + insulation in one piece) The connection technology of external wall panels and steel structures is developed, and the connection nodes have the ability to adapt to steel structure buildings under the action of earthquake or wind load. 2. Inner partition walls in steel structure buildings should preferably use lightweight partition boards; commonly used ALC strips, light steel structure building gypsum boards, glass fiber reinforced cement boards, etc., should further strengthen the integration of research and development Products and their connection technology to steel structures. 3. The development of prefabricated steel structure housing should give full play to the advantages of its construction quality and construction period. 1. Good construction quality and high construction precision. Steel structural components are composed of various profiles, which are easy to manufacture, highly industrialized, and have high processing precision; the on-site assembly adopts bolt or welding connection, which can ensure the precision of construction, and is the most suitable for the outer wall and the outer wall. The installation and decoration of the inner partition wall provides convenience. The quality systems of steel structure processing and manufacturing enterprises and installation enterprises are relatively sound, and the construction quality of steel structure buildings is easy to guarantee. Steel structural components belong to green building materials, which are not only less polluting, but also recyclable. 2. The construction speed is fast, which can effectively shorten the construction period. The steel structure components are all factory-produced and assembled on site. Generally, each floor takes 2 to 3 days, and the construction speed is very fast; the outer retaining wall and the inner partition wall are integrated by the factory. The chemical wall panels are transported to the site for assembly, which can not only ensure the quality of the outer protection and the inner partition wall, but also greatly shorten the construction period. 3. Good seismic performance. Compared with traditional concrete buildings, steel structure buildings are lighter in weight, coupled with good ductility and strong plastic deformation ability of steel structures, so the safety and reliability of steel structure buildings under large earthquakes are greatly improved; especially suitable for high Kindergartens, schools and hospitals in the intensity area are key fortified buildings.

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