Discussion on the design of steel structure industrial plant

Steel structure building is the most revolutionary new development and new application after reinforced concrete building. The characteristics of light steel structure buildings are outstanding: good seismic performance, small structure occupation area, fast construction speed, steel structure can be made into large span, large space, especially in the performance of the building scale is quite excellent.

1 The facade design is light

The building performance of the steel structure mainly has the following four aspects, namely scale, lines, colors and changes. Color -type steel plates make the light steel structures perform colorful, giving people a refreshing feeling that is obviously different from traditional reinforced concrete buildings. In the design of the steel structure industrial plant, the body shape of the plant is subject to the constraints of the process. At the same time, if the body changes are too rich, it will form a complex node treatment, thereby increasing the cost of the project. Therefore, in the design, it is commonly used to use jumping colors and cold tones, focusing on highlighting the main entrances, outer Tiangous, and Border Water, etc., which not only enriches the facade, but also reflects the magnificent momentum of modern industrial plants. Traditional reinforced concrete structure plant, the peripheral wall is brick masonry, the external renovation is coatings or tiles, supplemented by color bands. However, it is not the case for the steel structure plant with color profiled steel plate. Line is the most unique characteristic of the architectural style of light steel structure. Symmetrical lines, horizontal or vertical, make light steel structure buildings rich in smooth metal texture, reflecting a strong modern industrial atmosphere. If a large number of lighting Windows are set on the wall, the line modeling of the wall will be damaged. Meanwhile, the roof of light steel structure can use a large number of roof lighting panels to achieve uniform lighting, which is very suitable for the joint workshop popular in the non-ferrous metal industry at present. It can ensure the building lighting without damaging the line of the wall panel.

2 Thermal insulation design
Steel has very good thermal conductivity, its thermal conductivity reaches 50W/m·°C, for steel structure buildings, if not heat insulation treatment, is bound to cause a lot of energy waste and consumption, but also to meet the requirements of technology and comfort requirements. Different thickness of insulation layer is calculated for engineering projects in different climate regions.

3 roof design

The focus of the steel structure factory roof design is waterproof. The waterproof design of the roof involves factors such as roof slope, the form of gutter, and the length of the single slope roof. The slope of the roof, according to the provisions of the “Technical Specifications of Roof Engineering”, the minimum of the roof slope is 5 %. However, in actual engineering, the roof slope of some foreign steel structure companies often achieve 3 % or even 2 %. Considering that domestic steel -structured manufacturer’s technical strength, node processing, and material performance are uneven, people control the slope of the roof to 5 %. In areas with large snow, the slope should be appropriately increased. The length of the roof of the single slope mainly depends on the height of the maximum temperature difference between the project and the maximum water head formed by the rainfall. According to the collected information and engineering design experience, the length of the single slope roof should be controlled within 70m. If it exceeds 70m, it is necessary to do special research and special treatment.

The project of the aluminum processing enterprise project in the Harbin area of a certain northeast is about 3 billion, and the main workshop has a construction area of about 145,000 m2, which is a vertical and cross -joint plant. One of the difficulties in architectural design is the length of the single slope roof. Harbin is located in the severe cold area. The temperature in winter is low, and the accumulated ice and snow repeatedly freezes, which can easily cause damage to ordinary steel roofs, especially at the gutter, which causes leakage. According to past experience, there is no successful example of the Inner gutter. Determine all the design schemes adopt the outer gutter. In addition, Harbin snow is large in winter. It should be high in the high and low spans to threaten the safety of the plant. Based on the above principles, the local single -sloping roof length of the steel structure plant has reached 115m. From the situation, it can be seen that there is no such example in the severe cold area. In this way, the roof solution becomes the focus of the construction plan. For the 115M long single -sloped roof, after investigation, there are two methods commonly used in the market.

1) Double -layer color pressure -type steel plate be filling with thermal insulation cotton has a large amount of use, but the thermal expansion and contraction of color steel plates caused by large temperature differences and long slopes is difficult to solve.

2) Compound flexible steel roof system, consisting of roof color steel plate inner plates, septum layers, thermal insulation layers, and coil waterproof layers. Due to the outermost layer of flexible coils, the entire roof is a closed system, and there is no problem of thermal expansion and contraction. The cost is slightly higher than that of domestic steel manufacturers. Due to the large investment in the project, expensive equipment, continuous production, and the leakage of roofs will cause a lot of loss of the enterprise. Therefore, the roof design requires everything. After various aspects of technical reliability and economy, the final plan is composite flexible steel steel. The combination of the roof and the traditional color steel plate roof, that is, the single -slope roof with a part of the local area of more than 70m is a composite flexible steel roof system, and the short -sloping roof with a traditional color steel plate roof system.