Industrial building light steel structure design

The construction of industrial buildings is gradually developing towards the trend of intelligence, large-scale and high-rise, the traditional cement structure and wood structure can no longer meet the demand, while the light steel structure, as an emerging technology, has been widely favored for its many advantages such as high plasticity and strong compressive resistance, and its effective application can not only reduce the self-weight of the building body, but also improve the safety and stability of the building. Light steel structure has become an indispensable technical means in the construction of industrial buildings, and has become an inevitable demand for the further development and application of subsequent construction technology.

1 Overview of industrial building light 

Compared with the concrete casting construction, light steel structure using space, construction speed, to make up for the traditional concrete cast-in-place construction inefficiency, pollution and other defects, and can be combined with the actual adjustment of strength, is now widely used in engineering construction. The structure applies a large number of steel skeleton, bolts, etc. in the construction, only need to simply splice assembly to complete the foundation construction work, will be applied in some industrial building construction, can effectively shorten the construction period, and can ensure the strength, space in line with the use of demand.

2 Analysis of industrial building light steel structure system

Industrial building light steel structure system includes main structure, secondary structure, roof structure and wall structure, all components are pre-designed, which will be analyzed in detail below.

2.1 Main Structure

Light steel structure is more flexible, lighter in weight and better in performance than traditional steel structure, and can be used in various buildings in combination with relevant technical measures. From the analysis of the main structure, single-span column legs can be hinged, and the span is controlled at 21~36 m; multi-span consider steel frame moment envelope to determine the size of steel beam and steel column variable cross section and select splicing nodes, and set swing columns in combination with the main body requirements, and steel frame beams are spliced near the anti-bending point, so as to ensure stability.

2.2 Secondary structure

The secondary structure material of light steel structure is mainly cold-formed thin-walled section steel, etc. In the design of purlins and wall beams of substructure, the structure type needs to be combined with the actual selection. Sub-structure can be divided into C-shaped or Z-shaped, of which C-shaped substructure is a simple support, cold-formed thin-walled steel plus corner brace composition, the application of relatively low stiffness; Z-type is a continuous support, the cross-sectional conditions of the bearing capacity is much larger, the span > 6 m purlins set tie, the use of thin-walled angle steel for tie can play a very good anti-overturning effect, the design must focus on this.

2.3 Roofing system

There are differences in the design of light steel structure and normal steel structure, and the constraints are very different. In the roofing system, load values must be considered, for which structural deformation and long/slender ratios need to be calculated in advance, and the relationship between the roof and the overall structure is subsequently determined. Light steel roofing system can be divided into screw exposed type, concealed buckle type and locking seam type, in practice, you can choose 0.6 mm thick color composite pressure-type steel plate as insulation and waterproof layer, under the steel plate can be laid under the glass fiber to bear the roof load, this way has gradually become mainstream.

2.4 Wall system

The wall system is also an important part of the light steel structure of industrial buildings, which needs to be carried out in accordance with the corresponding technical regulations in the design process, and can be combined with the actual choice of pressed steel plates or composite panels to ensure the rationality of the design. The pressed steel plate is mostly placed vertically, and usually requires a layer of inner board to be laid on the inside, and fiber wool can be placed for heat preservation, with better overall aesthetics; the composite board is mostly placed horizontally, requiring waterproof treatment at the vertical connection, and the external wall surface needs to be lapped vertically every 6~9 m, suitable for industrial buildings with higher requirements.