1 Foreword

 

Starting from the architectural form of our country, the curtain wall industry has developed rapidly in recent years. People have gradually improved the overall aesthetics of the building. They pursue more characteristics and require the building to highlight the characteristics of the design. There are many large-span and high-end buildings. The style of the building and the structural space system are gradually strengthened. In this situation, the simple aluminum profile is not enough to meet the force performance of the curtain wall in the limited installation space. The combination of steel and aluminum curtain wall, to ensure the stability of the building has a very important role, and the quality of the steel and aluminum structure itself is very light, strength, cost is low, suitable for a variety of projects.

 

2 Advantages of curtain wall design of steel and aluminum structure

 

In the design of curtain wall support structure, in order to meet the stress requirements, save the amount of aluminum profile and reduce the cost, steel and aluminum composite cross-section rods are often used, the exposed part is aluminum alloy profile, and the concealed part, that is, the main stress part, is steel profile, thus achieving the purpose of beautiful appearance, small cross-section, strong bearing capacity and low engineering cost.

 

Starting from the nature of the material, the aluminum alloy profile has good appearance effect, strong applicability and durability, and the strength value of the aluminum alloy is generally set at 85.5MPa, and the elastic modulus can reach 70000MPa, which is an ideal material for curtain wall design. The steel has high strength and elastic modulus of 2100000MPa, which is generally more than three times that of aluminum alloy profiles. The load-bearing requirements also have good development prospects, and the decoration and durability are slightly worse than aluminum. The use of steel and aluminum combination of this complementary structure, both to ensure the appearance and increase the strength and stability.

 

3 Technical points of curtain wall design of steel and aluminum structure

 

The combination of rigid and aluminum profiles can generally be divided into two types: superimposed and combined. The so-called superposition type: that is, there is no connection between the steel profiles, and only the structure can ensure that the two are stressed at the same time. However, the combined type is different from the superimposed type. It is a combination form in which the two are closely connected by physical or chemical methods between rigid and aluminum profiles. Because of the combination of these two sections is different, so the performance after acceptance is also different, the design calculation method is also completely different, but because of the specific circumstances of the project is different, the two forms have more applications.

 

4 Problems of steel and aluminum composite materials in curtain wall design

 

At present, glass curtain wall is widely used in the design of building curtain wall, and its light sense and color have a very wide market prospect. But from the current form, there are many deficiencies in the actual project. Aluminum alloy materials and cylindrical materials are widely used in the structure of curtain walls, and there are problems in selecting materials. However, from a construction point of view, this material is less elastic and cannot withstand the effects of strong winds. Secondly, in practical applications, the application of aluminum and steel may form some so-called primary batteries, which affect the safety of the entire curtain wall, so it is necessary to avoid the phenomenon of primary batteries. Should choose some other raw materials, try to avoid the appearance of electrolyte.

 

From the design specifications and other aspects, the structural form of steel-aluminum combination lacks some market industry specifications, but the steel-aluminum combination structure has broad prospects for development. In this case, the relevant departments should try to do a good job in the relevant provisions of the application of steel and aluminum combination. At the same time, it is necessary to strengthen the formulation of various technical standards, so that standards and technical standards are combined to reduce the problems of steel and aluminum materials.

 

4 The solution of steel and aluminum combination in the design of structural curtain wall

 

The existing problems will have a certain impact on the development of curtain wall structure. Therefore, in order to fundamentally improve the quality of curtain wall design, it is necessary to strengthen the application and the audit of the application process. Curtain wall in the construction and application of the design is very strict, high security requirements. At the same time, it is necessary to establish a complete set of plans, strengthen the construction of reward and punishment regulations, create high-quality engineering change activities, and comprehensively improve the overall quality of the curtain wall structure and the management level of construction enterprises.

 

Secondly, strengthen the quality management of the curtain wall structure and select suitable materials. The quality of raw materials directly affects the quality of the curtain wall. Raw materials are the key to the construction of the whole project, and good quality is the key to the construction of the project. Relevant departments must strengthen the application of new technologies to avoid some quality problems due to the relationship between materials.

 

For example, some inert materials such as anti-corrosion gaskets can be added to some steel and aluminum structures to prevent the production of raw materials from contacting the two and avoid the occurrence of galvanic cell reactions. The steel and aluminum structure should be continuously reinforced to strengthen the stability of the curtain wall structure. In the application process, it is necessary to continuously strengthen the application of new materials and new technologies to strengthen the strength and scope of use of materials. In the design of curtain wall structure, it is necessary to enhance the firmness of the curtain wall structure, but also to enhance its ability to withstand high temperatures. Curtain wall technology itself is constantly developing, designers should continue to learn and apply, improve existing technology practices, strengthen structural innovation, and promote development in many aspects.

 

Finally, in terms of technology application, we should learn more from developed countries, adopt new methods, new ideas, learn new technologies, and strengthen our own construction. More importantly, the relevant departments should strengthen the formulation of relevant laws and regulations, and the technical testing department should strengthen the application of technical specifications, which plays an important role in improving the design and application of curtain wall structure.

 

5 Conclusion

 

In the construction of curtain wall, building materials are the foundation to ensure the stability of the building, and it is the important responsibility of the architectural designer to choose the right building materials. With the continuous development of architectural design, in the design of large span and large height curtain wall, the structure of steel and aluminum combination will gradually be favored by designers and widely used. Changing the structural design form of the curtain wall adds more color to the design of the building, and the building itself reaches a new level. Therefore, it is necessary to make full use of the characteristics of building materials, use advanced technology to simulate the overall design, enhance the reliability of material design, draw some data from the actual operation, and carry out effective data analysis, skillfully combine these materials, avoid problems, and realize the optimal combination.