Steel structure factory roof characteristics

The roof of the steel structure factory building is generally relatively flat, because the steel structure factory building is usually relatively flat, and the area is relatively large, and it will not be said that there are some uneven or strange designs. The practicability of the uneven steel structure factory building is very poor, because the area of the steel structure factory building is generally larger than that of the ordinary factory building, so the uneven factory building structure

The body is not conducive to the application of steel structure workshops. It is precisely because of this that the roofs of many steel structure factories are designed to be flat, because the roofs of steel structure factories are still serving steel structure factories in essence. 

The heat dissipation of steel structure workshop roofs is generally better, this is also because the work performed in steel structure workshops is generally the kind of work that generates relatively large heat, such as some glass manufacturing or some light industries, This kind of steel structure factory building needs a lot of power support. When using a lot of electricity, it will generate a lot of heat. Therefore, when designing the roof of a steel structure factory building, it is generally considered to use materials with better heat dissipation , In addition, there are generally more people in steel structure workshops, so it is necessary to consider heat dissipation and ventilation from every angle as much as possible, because human breathing will produce carbon dioxide.

Principles to be Followed in Choosing Appropriate Space Frame Engineering Design Form

       There are many different forms for the design of space frame processing engineering, but depending on the environment, the selected form may be different. The following are the basic principles to be followed in the selection of space frame processing engineering:

1. Large-span space frame processing engineering: three-way cross space frame and triangular pyramid space frame are preferred;

2. Plane cross truss system: If the plane shape is square or close to square, it is better to adopt the orthogonal and upright form. When the plane shape is rectangular, the orthogonal and oblique form should be adopted. It is not recommended to adopt the oblique and oblique form.

3. The space frame of the quadrangular pyramid system is evenly loaded and has the best rigidity; the space frame is placed upright to save steel, which is convenient for lighting and ventilation, and the oblique and star shape are conducive to giving full play to the strength of the material.

4. When the planar shape is trigonal, hexagonal or circular, the triangular pyramid system space frame is the first choice. Among them, the triangular pyramid space frame has the highest rigidity, followed by the evacuated triangular pyramid, but it saves materials and has a simple structure, and the honeycomb shape has the worst rigidity. It should be combined with peripheral supports when selecting.

5. Selection of support mode: Peripheral support is suitable for large and mid-span space frames; point support is flexible in layout, suitable for factories and warehouses with large column spacing, and mixed support is suitable for hangars or assembly workshops. The selection of the space frame processing project is not a random choice. It should be considered according to many factors such as the environment and function of the site, so as to ensure that the space frame building can play its due value.

Metal arched roof slot connection method

According to the principle of differential division, a ring can be divided into several small units, and the difference between the width of each unit of each unit and the B2 is ΔB. This difference is processed into a wedge -shaped slot and connects two equal width plates together. This method is called a groove connection method. This method can be used to zero, and it is difficult to turn it. The use of existing ordinary equipment and technology can solve more complicated problems. Not only is it easy and feasible, but also reasonable, improve the utilization rate of materials and reduce waste. The inner arc length is the total length of the division, and the actual external width of the selected board type is divided into unit B2, and the corresponding outer circular unit arc length is B1. Selected wide straight boards, only one-way bending can meet the styling requirements. The difference between the internal and external units is Δb = B1-B2. The gap between the two boards can be suppressed into large, small cover grooves according to the selected plate -shaped ripple forming size. Pull tightly by pulling rivets on the side of the waves, or pull rivets at the valley. This method is applied in the engineering practice in recent years, and has achieved good social and economic benefits. The following is based on two typical projects to explain the choice of different shapes and different board types in detail, and the design and construction methods of the cover slot are also different.

After the above introduction, it can be seen that it can be seen that the groove connection method has great advantages at the hyperbolic level. The SAFS steel structure believes that this practice can be promoted and applied. It is particularly applicable to ordinary mid -range materials such as ordinary pressure steel plates. For high -end materials such as aluminum plates or aluminum alloy plates, direct forming method can also be used. The cost of such engineering is generally relatively high, the strength of the board is low, and it is easy to mold.

Main Factors of Steel Structure Damage and Its Reinforcing Technical Measures

 The main factors of steel structure damage are:

(1) Insufficient bearing capacity of the structure caused by load changes, extended service, and changes in codes and regulations;

(2) The component is deformed, twisted, disabled, dented, etc. due to various accidents, resulting in weakening of the section of the component, warping of the rod, cracking of the connection, etc.;

(3) Deformation, cracking and warping of components or connections caused by temperature difference;

(4) The cross-section of steel structural members is weakened due to corrosion caused by chemical corrosion and electrochemical corrosion;

(5) Others include mistakes in design, production, and construction, and illegal use and operation during the service period.

There are mainly three types of reinforcement technical measures for steel structures:

(1) Cross-section reinforcement method: Reinforce with steel in part or along the whole length of the member, and connect them into a whole to make them bear common force;

(2) Change the calculation diagram: add additional supports, adjust the load distribution, reduce the level of internal force, and force the displacement of the statically indeterminate structural supports to reduce the stress peak;

(3) Prestressed cable method: use high-strength cables to reinforce weak links of the structure or improve the overall bearing capacity, stiffness and stability of the structure.

The value of large-span space frame buildings

1. The structure should be light; the lightest space frame structure can withstand high-intensity pressure. This protects the environment in terms of energy saving, land saving, material saving, etc., thereby reducing pollution and providing people with healthy, efficient and adaptable space for use.

2. The construction period should be short; generally speaking, the construction time of the space frame is much shorter than that of the traditional concrete structure building, which is also greatly improved in terms of saving time, labor and resources.

3. The ductility should be strong; generally speaking, the rigidity of steel is very strong, but after it is processed into a building, the pressure it bears will also increase to a certain extent; and its performance in mobility, designability, and easy combination will come up. See, space framed buildings are also much taller than traditional concrete buildings.

The rigidity of the space frame is relatively high, so if it is organized with steel and high-strength steel wire for a combined purpose, the modeling of the space frame is a major feature of green buildings.

In the effective service life of the building, saving resources to the maximum extent has a great effect on people's green life. From the above three aspects, the texture, construction period and ductility of space frame buildings can play a role in Green energy-saving effect combined with modern buildings.

Whether the space frame can achieve the above three points has a great relationship with the designer's design concept and the materials used. The green design concept of steel structure was introduced into the world, but the initial stage was not very smooth, so there were many The novel space frame structure is complementary to the human landscape and green buildings. The concept of lightness, speed, goodness and economy is the green development direction of the space frame building. The quality of the space frame does not depend on how much steel or The size of the volume is expressed, but the main purpose of the space frame is expressed through a reasonable amount of steel and a reasonable design form, which is the purpose of green buildings.

Problems that should be paid attention to when producing color steel plates

     The color steel plate has the properties of high mechanical strength and easy forming of steel materials, as well as good decoration and corrosion resistance of coating materials. Steel color plate is an emerging material respected in the world today. Many steel color panels play an important role in rapidly developing industrial cities, but there are often many problems in the production process of steel color panels. Today, let's talk about what problems should be paid attention to when producing steel color panels.

There are wrinkles on the edge of the steel color plate. When there is no problem with the equipment, the original existence of the substrate generally occupies a large proportion. The wrinkles of the hot-dip galvanized steel plate are mainly caused by the existing technology of the galvanizing production line and the failure of the equipment. It is generally understood It is not difficult for friends of galvanizing process to solve this problem. Judging the quality from the appearance of the steel coil: Generally speaking, the appearance requires neat winding, and there are no burrs, serrated edges, and obvious gaps on both sides of the steel coil. diverse issues.

The lines of the steel color plate are not smooth, and the paint or back paint after the product comes out has the phenomenon of paint leakage, which is called in the industry: lines. This kind of problem is generally an unavoidable problem for every manufacturer. There is a part of impurities in the paint, part of the reason for the equipment, and a proportion of the factor of the substrate.

The color difference on the surface of the steel color plate is partly related to the quality of the paint. There are also practical problems in the production process. The type of substrate also occupies a certain proportion. The steel color plate produced by the process and raw materials will appear different.

There are holes and missing coating on the surface of the steel color plate, because the quality of the substrate is defective. If the substrate has serious edge damage and gaps, and there are holes in the substrate, the painting staff will open the painting equipment according to the industry standard operation requirements and let it skip. , it is inevitable that there will be leakage phenomenon.

There is a bulging phenomenon on the wave edge or the middle of the steel color plate: the main reason is the quality problem of the substrate. The predecessor of the substrate is rolling hard, and the wave edge phenomenon caused by uneven thickness is the most, and the other is less due to equipment problems. This is the actual reason. If the substrate is not waved and painted, the general situation is: It is caused by the abnormal operation of deviation correction or other equipment.

The paint peeling off the surface of the steel color plate: the production unit should check the pressure and whether the equipment operation system is normal and good, whether the bearing is working well, and whether the pressing action of each group of steel rollers of the tile press is consistent, there will be actual interference problems. . Due to the sharpness of the pressing wheel of the new press equipment, it is easy to cause scratches on the dry film of the paint on the steel color plate. It is recommended that customers pay attention to such problems. The quality of the paint is the most important thing that depends on the quality of the product. The weather resistance, flexibility and hardness of the paint film are proportional to the inspection results of the product, which means that the quality of the paint is qualified, such as: impact and wipe resistance. Both T-bend and T-bend can reflect the actual quality problems of the paint. If there is a substandard operation within the scope of the process flow, the cause must be immediately found and substantive adjustments should be made.

Design standard for metal roof system

 The application of the metal roof plate enclosure system has a long history abroad, and its product selection and technical standard system are relatively complete.

In 1996, Britain officially implemented the "Technical Specifications for the Application of Voltage Metal Plate Plates" (BS 5427-1). method. In addition, the industry manual or guidance documents formulated by research institutions or industry associations in some regions and countries have important guiding significance for the design and application of the metal enclosure structure. The more influential industry standards are the series of technical documents of the metal outer surrounding structure manufacturer association in the European region and the metal building system manual of the North American Metal Building Manufacturer Association.

Our country has also continuously compiled national product standards such as "Building Voltage Steel Plate", "Aluminum and Aluminum Alloy Polying Plates", and "Metal Platform Plate for thermal insulation". At the same time, the improvement of national technical standards, the "Technical Specifications of Slope Roof Engineering" and "Technical Specifications for the Application of Voltage Metal Board" specifications will be more conducive to the application and development of metal roof technology.

Arched corrugated steel roof gable wind resistance column

The gable wind-resistant columns can be designed according to the conventional design. Under normal circumstances, the metal arch corrugated roof project should be closed. In the open or semi-open situation, due to the uncertainty of the wind load of the roof and the substructure, the connection between the metal arched corrugated roof and the substructure is generally hinged or fixed. According to the simplified calculation model, the design of the substructure is much simpler compared to the conventional structure. The ring beam, column (wall) and foundation of the lower structure are designed according to the bearing reaction force calculated by the upper arch corrugated steel roof structure analysis, and the whole structure can be simplified as a series of statically indeterminate members for analysis, calculation and design.

The arched corrugated steel roof situation is more complex and difficult to predict. At this time, part of the gable above the ring beams at both ends of the roof should be closed, and wind-resistant columns should be set up if necessary. On the one hand, it can beautify the architectural effect of the roof, and more importantly, it increases the overall stiffness of the roof and increases its wind resistance.

Such as the waterproof and anti-corrosion treatment of the arch foot point of the arched corrugated steel roof structure, the setting of the lighting belt and the ventilation cap and the node treatment, thermal insulation, lightning protection and fire prevention, etc.

Large-span Complex Steel Structure Construction Characteristics

SAFS Steel Structure Engineering Co. LTD would like to introduce the construction characteristics of large-span complex steel structures here.

Firstly, it is of a high construction difficulty. For engineering projects that apply large-span complex steel structures, they usually have the characteristics of large space ratio, large project scale, huge workload of related projects, and large amount of engineering materials and components required and so on. This shows the difficulty and complexity in engineering construction. Due to different material components, there are many differences in structure, form, size, etc., so it will be more difficult to set out in specific construction.

Secondly, it requires high installation accuracy. Under normal circumstances, the large-scale large-span complex steel structure project is mostly a project undertaken by the government, which means that the project completion degree of the project will be reflected in the society as a kind of construction level, so the requirements for the construction of related projects are numerous and strict. For example, in the installation and processing of components, the accuracy of the relevant steps must be refined within the relevant regulations, and the joint construction must be carried out in strict accordance with the national welding seam indicators, so as to ensure that the welding seam effect and installation accuracy.

Large-span complex steel structure projects have strict requirements on construction materials in modern buildings, because they involve many aspects. In order to carry out the normal orderly construction work, the quality and strength of the steel are increasingly stringent in the steel selection process.

Large-span steel structures also require prestressing technical support. In the construction industry, prestressing technology is a vital technology to ensure the quality of design and construction work. In large space and complex steel structures, prestressing technology is mainly used in cable-membrane, cable dome, and overall expansion and contraction in innovative structural buildings.

Steel structure space frame building - the pillar of future construction technology

       A new type of building system of steel structure building has the industry boundaries between the real estate industry, construction industry and metallurgical industry, and is integrated into a new industrial system. This is the steel structure building system that is generally optimistic about the industry.

Compared with traditional concrete buildings, steel structure buildings replace reinforced concrete with steel plates or profiled steels, which have higher strength and better earthquake resistance. And because the components can be manufactured in factories and installed on site. Therefore, the construction period is greatly reduced. Due to the reusability of steel, construction waste can be greatly reduced, and it is more green and environmentally friendly. Therefore, it is widely used by countries all over the world and is used in industrial buildings and civil buildings.

Take the stadium space frame as an example. The stadium refers to a 400-meter runway (including a football field in the center) with fixed road teeth. Outdoor track and field venues with more than 6 runways and fixed stands. The site area is huge, and the roof is usually a transparent semi-closed structure. The stadium space frame structure has good integrity, high rigidity and good seismic performance, and can create a large-span column-free space, which is widely used in small and medium-sized stadium projects. In large-scale stadium projects, it is necessary to form a composite structural system with other types of structures to play their respective advantages. After careful and strict anti-corrosion and fire-proof treatment, the space frame parts are basically maintenance-free within the service life, and the cost performance is very high.

At present, the application of steel structure buildings in high-rise buildings is becoming more and more mature, and it has gradually become the mainstream construction technology, which is the development direction of future buildings.