A combination grid

Abstract

The invention relates to the field of building structures. The technical problem to be solved of the invention is to overcome the defects in the prior art and provide a novel combined net support structure, which is used for fulfilling the aims of simple design computation, convenience for construction, high waterproofness, capability of bearing high loads and the like. The combined net support structure comprises a net support upper chord, a lower chord and a web member, wherein the upper end of the web member is connected with the lower side of the upper chord; and the lower end of the web member is connected with the lower chord. Improvements are that: the upper chord comprises an integral concrete plate and a steel structural beam; the steel structural beam is embedded into the integral concrete plate, and is at least partially arranged on the outer side of the lower surface of the integral concrete plate; and the lower chord and the web member have steel structures, and are connected with the lower side of the integral concrete plate through hollow ball gaps.

Description

technical field [0001] The invention relates to the field of building structures, in particular to a combined network frame. Background technique [0002] The application of the country-combined network frame began in the 1980s, and then it has developed rapidly, and its application range has also expanded to the field of multi-story and high-rise building floors. The upper chord of the composite grid is composed of concrete slabs, and the lower chord and web members are composed of steel structures. The upper chord concrete slab is composed of a slab 11 made of concrete, a rib beam 12 and a cross beam 13. The concrete slab is integrated with the steel structure by welding the rib beam embedded parts 14 and the steel structure nodes 15, such as figure 1 and figure 2 shown. [0003] The biggest advantage of the combined grid structure is that its upper chord plate also serves as maintenance and load-bearing functions, and the material properties of steel and concrete have...

AI Technical Summary

Problems solved by technology

However, the combined grid has inevitable disadvantages: the design and calculation are complicated, and the construction is difficult

[0004] In terms of construction, its complexity lies in the following three aspects: First, because the concrete slab is composed of slabs, rib beams and cross beams, the concrete slab is generally a triangular slab, such as figure 1 and image 3 As shown, formwork is difficult to make when prefabricating components

Secondly, when combining the concrete slab with the steel structure, due to construction errors (such as irregular concrete slab production, large welding deformation of the steel structure, error in the blanking size of the steel structure, etc.), the reserved joint between the slabs or If it is too large or too small, it will be difficult to weld concrete embedded parts and steel structure nodes, the welder's operating surface will be limited, and the quality of welds will be difficult to guarantee

Finally, after the joints are filled, the bonding between the rib concrete and the newly poured fine stone concrete is not ideal, making it difficult for adjacent rib beams to be connected as a whole through the bonding of the fine stone concrete between the gaps. There is a deviation between the calculation model and the actual structure. On the other hand, if the grid frame is used as a roof, it is easy to seep water and affect the use

Images