Space pipe truss structure has certain requirements on production and construction technology and its processing and production equipment, which is mainly due to its use of coherent welding nodes, so there are certain limitations in the use of space pipe truss structure. What are the important types of spatial tube truss structure?
Space pipe truss structure can be divided into rectangular pipe truss and ring pipe truss according to the sectional appearance of the member. As a prefabricated structural member, square steel pipe has the advantages of convenient vertical cutting and good bending performance of the member at the node, which is widely used in the developed countries.
Immediately welded nodes square steel pipe without stiffening plate, node plate, prompting the node building with less steel, node way more and more simple and clear, prefabricated components in the even more convenient, in the main performance of architectural art are stronger. The advantages of rectangular steel in addition to a high inertia force half warp and efficient torsion cross-section, but also has its surface and no uneven corners, in the appearance of the aerodynamics is also good.
The manufacture of round steel tube structures will be more expensive in price than the production of rectangular tube structures. If the stringers are similarly small compared to the support rods, and when the support rods are welded directly to the stringers, the tops of the support rods need to be cut along the coherent lines, and the welds at the end of the tube ends need to be shifted along the tube neighborhood in order to facilitate the electric welding. Semi-automatic or hand-made cross-wire cutting of round steel tubes will be more expensive than vertical laser cutting of rectangular tubes by many intervals.
At this stage overseas, round steel pipe is not as widely used as rectangular pipe because of the various reasons mentioned above, and the production and processing stock of goods in factories is low, so the advance preparation time for raw materials is long. In the structure, if other structures or lu-plates are placed on the chord at the upper end of the truss structure, the rectangular pipe has a very good coupling surface for supporting point such structures. Electro-welding the support point structure to a round steel tube is much more complicated than electro-welding to a rectangular tube.
Another problematic factor to keep in mind when choosing materials is that rectangular tubes are easier to transport and put in place, which is another important level at which rectangular tubes are better than round steel tubes. The more common way of space tube truss is space triangle truss. This kind of structure has beautiful shape, easy installation and stable performance. Compared with the spherical net frame, the triangular space truss structure eliminates the vertical components of the web rod, and the building types are more diversified than the space spherical net frame structure, so it is used more often.
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