Detailed explanation of point-supported glass curtain wall

Do you know the detailed interpretation of point-supported glass curtain wall? The supporting structure of point-supported glass curtain wall has three structural forms: steel structure, pull rod type and cable type. If the steel pipe is used to transport natural gas, chemical raw materials, water and steam, the pressure of the medium in the pipe will produce tension at the weld, which requires high welding strength. Let's get to know each other.

Detailed explanation of point-supported glass curtain wall

Point-supported glass curtain wall is also called point-connected glass curtain wall and point-connected glass curtain wall. The point-supported glass curtain wall is made of transparent white glass, which makes the outdoor and indoor space transparent. The structural system only has simple structures such as tie rods and steel cables, and there is no frame structure to block the line of sight. The whole space is bright, open and transparent. Suitable for large public buildings, such as the waiting hall of traffic building, large shopping malls, opera houses and other cultural buildings, as well as the lobby of hotels and luxury restaurants.

1, point-supported glass curtain wall structure

There are two structural forms of point-supported connection glass curtain wall, one is through connection, and the other is back bolt connection.

Through connection type. Its overall structure is that the stainless steel barge joint passes through the round hole in the glass to connect with the curtain wall bracket, and the stainless steel barge joint and the curtain wall bracket bear the load of the glass and become the main connectors and stress parts. The barge joint is exposed outside the glass. Penetrating glass curtain wall can be divided into submerged type and floating type.

(1) countersunk head type. The glass is fixed by countersunk head bolts, and the barge mouth sinks into the outer surface of the glass, which is smooth and beautiful. The glass hole is a conical hole, which is complicated to process. The thickness of glass should not be less than10mm.

(2) floating head type. The glass is fixed with floating head bolts, and the barge joint is exposed on the glass surface.

(3) Back bolt connection. Its structure is that the stainless steel barge joint does not penetrate the glass, but penetrates about 60% of the thickness of the glass. From the outside, there is no connecting fulcrum member, which is very integral.

2. Supporting structure of point-supported connection glass curtain wall

The supporting structure is the most important stress component of point-supported glass curtain wall, which transfers the wind load, temperature difference, self-weight and earthquake load on the glass surface to the main structure. The supporting structure must have sufficient strength and rigidity, and must be reliably connected with the main structure, and the curtain wall shall not be damaged due to the deformation of the main structure.

When calculating a single beam structure, the deflection of the material is generally controlled. As long as the deflection calculation is qualified, its stress calculation will also be qualified. Trusses and grid structures generally control structural stress, and as long as the stress meets the requirements, their deflection can meet the requirements. The single-beam structure mainly uses the bending properties of materials, that is, the elastic modulus e of materials. Because the E of various steels is basically the same, and Q 195 and Q235 are relatively low-cost materials, Q235 and Q 195 can be selected. Truss structure mainly uses the tensile and compressive properties of materials, that is, the strength of materials, so choosing materials with high allowable strength will greatly reduce the amount of steel used. It not only reduces the cost, but also improves the aesthetics of the project. Therefore, middle and high strength materials such as Q345 and Q355 are selected.

If the steel pipe is used to transport natural gas, chemical raw materials, water and steam, the pressure of the medium in the pipe will produce tension at the weld, which requires high welding strength of the weld. At the same time, there will be a small amount of composition difference between the weld metal and the base metal of the steel pipe, and there will be electrode potential difference, which will cause electrochemical corrosion, so the weld is a test point of the fluid transportation pipeline. However, steel pipes used for supporting structures are based on their tensile, compressive and bending properties. Therefore, there is no requirement for welding seamless pipes, and the cost of welded pipes is low. As far as possible, welded pipes are preferred for large structures.

For stone, hidden frame, decorative surface and aluminum-plastic curtain wall, sunlight can't penetrate the surface material of curtain wall, the temperature difference between supporting structure and main body of building structure is basically the same, and the thermal expansion coefficient of steel structure and concrete structure is basically the same. So the problem of thermal expansion and cold contraction can be completely ignored. However, for point curtain wall, most of the glass is transparent, and sunlight can shine on the supporting structure through the glass, resulting in a large temperature difference between the supporting structure and the building structure, resulting in temperature difference stress, so the temperature difference effect must be considered.

The detailed interpretation of point-supported glass curtain wall is here. Point-supported glass curtain wall system is widely used abroad for its good permeability, safety and beautiful architectural performance. With the development of building materials production technology and the rise of modern architectural art modeling in China, the point-supported glass curtain wall, a new architectural form, has also developed rapidly in China. Glass curtain wall appears in different styles of buildings, so it also produces different curtain wall structure systems.