Prefabricated light steel fireproof load-bearing combined wall structure

Abstract

The invention discloses a prefabricated light steel fireproof load-bearing combined wall structure which is formed by fixedly connecting sandwich wallboard units on two sides and a light steel joist framework unit at the middle. Each sandwich wallboard unit comprises an A-side wall board and a B-side wall board; and an autoclaved aerated concrete slat (3) and thermal insulation cotton (2) are spaced between the A-side wall board and the B-side wall board. The light steel joist framework unit is formed by fixedly connecting a cold-formed steel upright (5), a cold-formed steel guide rail and an autoclaved aerated concrete short column (8) of which the thickness is equal to the height of a web of the cold-formed steel upright. Adjacent sandwich wallboard units on the same side are inserted into an autoclaved aerated concrete butt-joint slat (9) through grooves (13) in the long sides thereof to realize splicing. The sandwich wallboard units and the light steel joist framework unit are connected through self-tapping screws to realize wall splicing. By adopting the structure disclosed by the invention, full prefabrication can be realized, the structure is light, and the steel consumption is reduced; and moreover, the structure has the characteristics of thermal insulation, sound insulation and fire resistance and is suitable for a load bearing wall system of a multi-story building.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and in particular relates to a form and structure of a prefabricated and assembled light steel composite wall that meets the load-bearing, fire prevention and sound insulation requirements of a multi-storey steel structure building. Background technique [0002] Compared with the traditional reinforced concrete structure, the steel structure has the characteristics of green environmental protection, good seismic performance, fast construction speed, and recyclable materials. With the rapid development of the national economy, my country's steel output has leapt to the first place in the world, and the domestic steel structure industry has also developed rapidly. However, compared with developed countries, the proportion of steel structure buildings in my country's steel output is still significantly low. Significant gaps still exist. my country is in the stage of rapid industrializatio...

AI Technical Summary

Problems solved by technology

Although this type of combined wall structure can meet the fire protection requirements of multi-layer structure load-bearing walls in my country's "Code for Fire Protection Design of Buildings" GB50016, there are the following problems: (a) There are two layers of wall panels on both sides of the cold-formed steel joist skeleton 1, a layer of thermal insulation cotton blanket construction in three processes, time-consuming and cumbersome; (b) The thermal insulation cotton density is required to be high and the compressibility is small, which increases the construction cost of the combined wall structure, and the vertical construction of the thermal insulation cotton blanket itself That is, there are certain difficulties and the operability is not strong; (c) There must be two rows of self-tapping screws penetrating to the flange of the cold-formed steel keel column at the seam of the same layer of wall panels, so the width of the flange of the cold-formed steel keel column High requirements; (d) If a fire breaks out in the room on the side where the composite wall is located, the joints of the wall panels on the fire side will be open, and the fire resistance of the composite wall structure will be significantly weakened

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