博文

目前显示的是 十一月, 2022的博文

Domestic steel space frame development status

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  The construction of a   large span space frame   structure started very early in Our country, but the development speed is relatively slow at the beginning. But in recent years, with the development of network design software, the long-span network structure in China has been developed rapidly. A series of large-span spatial structures represented by the 1990 Beijing Asian Games, 1996 Harbin Winter Asian Games, 2008 Beijing Olympic Games, 2010 Shanghai World Expo, 2010 Guangzhou Asian Games and many other sports buildings symbolize the great progress made in China's architectural technology and have a great impact at home and abroad. However, we should recognize that there is still a gap between the development of China's long-span spatial structure and the international advanced level. Mainly in the form of structure is still relatively restrained, lack of innovation. Especially, the engineering practice of super-span space structure is still relatively few. n the 1960s, the

Construction technology of super-span steel dome building

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  1. General situation of   steel dome building   structure and construction difficulties The  glass dome structure  is a three-dimensional space shape, which has three-dimensional force characteristics under the action of load. Compared with the plane structure, it has the advantages of reasonable force, light weight, low cost, and can be used for large spans. It is widely used in storage bins. , Large-span factory area. Under the same span, compared with the portal steel frame or steel truss structure, the space frame dome structure can save about half of the steel consumption. However, due to the influence of the traditional design and construction concept, the use of the super-span space frame dome with a diameter of more than 100 meters is difficult. The amount of steel is generally still as high as about 120kg/m2, which not only directly affects the manufacturing cost, but also affects the construction safety of the space frame dome under such a large self-weight. Therefore, how

The type of space frame structure

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  There are many types   of plane space frame   structure s, and there are different classification methods according to different classification indicators. According to the structure, it can be divided into a double-layer space frame   and three-layer space frame . The double-layer space frame   is composed of upper and lower chords and webs; the three-layer space frame   is composed of upper and lower chords plus a middle layer of chords and webs. Generally, double-layer space frame s are used. According to the different supporting conditions, flat space frame s are divided into single-span and multi-span. The most commonly used is the single-span flat space frame , and its support forms include four-point support, multi-point support, and edge-point mixed support. The space frame   frame supported by four points should be cantilevered, generally, 1/3 of the middle span; the continuous span supported by multi-point support should be 1/4 of the middle span, which can reduce the bendi