Novel composite steel keel-large plate structural system and construction method

Abstract

The invention discloses a novel composite steel keel-large plate structure system and a construction method.The composite steel keel-large plate structure system comprises a steel framework and concrete, firstly, the steel framework required in a construction scheme is formed by splicing profile steel, and then the concrete is poured; the steel framework is in a grid shape formed by splicing and overlapping steel keel connectors and straight steel keels or arc steel keels, and all the parts are connected in a welding mode or a bolt mode or the like. The construction method comprises the following steps: firstly, determining to adopt an elastic plate assumption mode to carry out construction drawing design, carrying out concrete-large plate plane arrangement according to the span of the basement, and carrying out arrangement on a construction site. And finally, concrete pouring is conducted. The invention provides the construction method which can be quickly constructed and is reasonable in design, high in stability, low in construction technology and high in economic index.

Description

technical field [0001] The invention relates to the technical field of building structure design and construction, and in particular provides a novel composite steel keel-slab structure system and a construction method. Background technique [0002] With the rapid development of my country's economy and the acceleration of urbanization, high-rise buildings with basements have become a common trend. According to the "Code for Design of Concrete Structures", calculated as a one-way slab, the thickness of the floor slab should have an aspect ratio greater than 2.0, and the slab thickness should not be less than about 1 / 30 of the length of the short side, and the thickness of commercial and roof slabs should generally not be less than 120mm. In addition, when the basement roof is used as the embedded end, the "Code" requires that the thickness is not less than 180mm. When it is not used as an embedded end, its thickness shall not be less than 160mm. At the same time, according...

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Problems solved by technology

However, considering the quality of the project, the ductility of the floor is poor, and the section of the column is much smaller than that of the slab, so a huge concentrated force is generated at the junction of the slab and the column.

At present, the punching shear force of the resisting column in the reinforced concrete floor slab is insufficient, so the failure of the column-slab joint becomes the main construction hazard in the project

[0004] In addition, in order to meet the clearance requirements, engineering designs are generally made of wide flat beams or no beams. The wide flat beams are not satisfactory in terms of force, and there are serious safety hazards without beams.

Therefore, the design industry mainly adopts the method of adding haunches to strengthen the slab-column joints or setting hidden beams to change the path of slab load transmission; however, there are certain difficulties in the construction process of adding haunches to large slabs, and the middle slab part is more convenient when the formwork is erected , but the height of the steel pipes added to the sloping plate is different, and it is more troublesome for the formwork reinforcement construction

And there are a lot of inclined boards, more wooden squares will be cut off, and wooden squares also have certain periodic difficulties

[0005] To sum up, the existing technology still lacks a composite concrete-steel skeleton slab and its construction method that can be quickly constructed, reasonably designed, strong in stability and high in economical indicators.

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