Bolt connection prefabricated assembly quadrangular pyramid space grid structure and manufacturing method thereof

Abstract

The invention relates to a spatial latticework of a quadrangular pyramid preassembled for bolt connection, which comprises quadrangular pyramid module units, a lower chord, an upper cover plate, a lower cover plate and bolts; the quadrangular pyramid module unit comprises an upper chord, a diagonal web member, a ribbed plate, a top plate of a web member and a bottom plate of the web member; the lower end of the diagonal web member is connected with the bottom plate of the web member while the upper end is connected with the top plate of the web member. The top plate of the web member is connected with the upper chord and the ribbed plate is arranged on the top plate of the web member. Different quadrangular pyramid module units are connected by the upper cover plate and the bolts on an upper chord layer, and the quadrangular pyramid module units are connected by the lower chord, the lower cover plate and the bolts on a lower chord layer. Assembled quadrangular pyramid module units are fixed on a supporting structure by nodes of a support, thus forming the spatial latticework of a quadrangular pyramid preassembled for bolt connection. The structure units of the invention realize the commercial production while the bolt connection is adopted on site to avoid the on-site welding so as to shorten construction duration and reduce construction cost, thus being applicable to spatial latticework systems of the quadrangular pyramid in various forms.

Description

Technical field [0001] The invention relates to a space grid structure adopting a quadrangular pyramid system, and more specifically, to a bolt connection prefabricated and assembled quadrangular pyramid space grid structure. Background technique [0002] Spatial grid structure has been greatly promoted and applied in industrial buildings and civil buildings due to its advantages such as light weight of structure and strong ability to span space. Among them, the space grid structure using quadrangular pyramid system is the most widely used. The commonly used quadrangular pyramid spatial grid structure generally uses bolted ball joints or welded ball joints, and steel pipes are generally used for upper and lower chords and web members. With its application in engineering, this structural system has exposed some of its own shortcomings, mainly in the following aspects: [0003] 1. The nodes and components of this structural system are made in the factory and assembled on site. Ther...

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Problems solved by technology

[0003] 1. The nodes and components of this structural system are manufactured separately in the factory, and then assembled on site, so the workload on site is heavy, the factoryization of components and the prefabrication of modular units are low, the construction period on site is long, and the construction cost is high

[0004] 2. For the quadrangular pyramid spatial grid structure with welded ball nodes, the welding workload on site is large, the welding quality is not easy to guarantee, and there are certain welding stress and deformation at the same time

[0005] 3. The quadrangular pyramid space grid structure with bolt ball joints is adopted, and invisible bolts are used on site for connection, which requires high precision of parts manufacturing, and the phenomenon of "false tightening" of bolts is likely to be caused due to on-site construction errors and other reasons, which brings certain problems. Structural safety hazard

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