Assembly structure and assembly joint of steel pipe concrete combined truss

Abstract

The invention provides an assembly structure and assembly joint of a steel pipe concrete combined truss. The assembly structure comprises at least one main limb steel pipe, at least one steel pipe concrete joint and at least one joining pipe. Each steel pipe concrete joint comprises a steel pipe joint body composed of a chord member and at least one web member. The chord members and the web members are filled with concrete. A pipe opening of each web member is arranged on the wall of the corresponding chord member and communicates with the wall of the corresponding chord member mutually. First connecting plates are arranged at the two pipe openings of each chord member. More than one bolt hole is formed in each first connecting plate. A second connecting plate is arranged on the other pipe opening of each web member. More than one bolt hole is formed in each second connecting plate. The main limb steep pipes are connected with the first connected plates in a locking mode through bolts. The joining pipes are connected with the second connecting plates in a locking mode through bolts. Concrete pouring holes are formed in at least any one of the first connecting plates and the second connecting plates. The transporting, mounting and detaching difficulty of equipment is reduced greatly, the construction period is shortened significantly, the construction cost is reduced, economy and high efficiency are achieved, the application range is wide, and the industrialization degree is high.

Description

technical field [0001] The invention relates to the technical field of prefabricated assembly structures in civil engineering, in particular to an assembly structure and assembly nodes of a steel pipe concrete composite truss. Background technique [0002] The traditional steel pipe truss is mainly composed of the main limb and the attached pipe, and the connection between the main limb and the attached pipe is usually welded. Before welding, it is necessary to use wire cutting to cut out intersecting lines at the end of the pipe according to the geometric characteristics of the main limb and the pipe to complete the welding. Limited by on-site construction conditions, welding often needs to be completed in the factory, so the workload is heavy, the production cost is high, and the processing cycle is long. Low. For large-scale truss structures, due to the cross-section and self-heavy weight of the rods, the requirements for hoisting machinery are very high, and many weldi...

AI Technical Summary

Problems solved by technology

Limited by on-site construction conditions, welding often needs to be completed in the factory, so the workload is heavy, the production cost is high, and the processing cycle is long. Low

For large-scale truss structures, due to the cross-section and self-heavy weight of the rods, the requirements for hoisting machinery are very high. A lot of welding work needs to be carried out before or during the hoisting on site, so welding is difficult and the quality is difficult to guarantee

[0003] When the traditional steel pipe truss is stressed, the failure mode of the member is mostly the buckling of the truss node or the cracking of the weld at the joint between the main limb and the pipe attachment. The shear stiffness of the truss is small, the bearing capacity is low, and the mechanical properties of the material have not been obtained. Full play; if the traditional steel pipe truss is corroded or partially damaged, its maintenance is difficult, costly and difficult to replace

At the same time, the fire resistance of the node area is poor, and once damaged, it is easy to cause the failure of the whole truss

[0004] For traditional steel pipe concrete trusses, steel pipe trusses are usually made first, and then concrete is poured on site, which is bound to be detrimental to energy conservation and environmental protection

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