What is a curtain wall?

Curtain wall is the external wall enclosure of the building, which is not load-bearing and hangs like a curtain, so it is also called hanging wall. It is a kind of light wall with decorative effect commonly used in modern high-rise buildings. The building envelope, which is composed of structural frames and panels, does not bear the load and function of the main structure.

definition

Curtain wall is the external wall enclosure of the building, which does not bear the load of the main structure and hangs like a curtain, so it is also called hanging wall. It is a kind of light wall with decorative effect commonly used in modern high-rise buildings. The building envelope, which is composed of structural frames and panels, does not bear the load and function of the main structure.

Curtain wall is an external wall construction method that uses all kinds of solid, light and beautiful building materials instead of traditional masonry or window-wall combination. It is a functional and safe external wall construction method that surrounds the periphery of the main structure and makes the whole building beautiful. In short, it is to put a beautiful coat on the building. The scope of curtain wall mainly includes the external wall, lighting roof (cover) and awning of the building.

Curtain wall for building: it is composed of panels and supporting structure systems (supporting devices and supporting systems), and has certain displacement capacity or deformation capacity relative to the main structure, and does not assume the role of the main structure.

trait

1, curtain wall is an independent and complete overall structural system;

2. Curtain walls are usually used on the outside of the main structure and generally cover the surface of the main structure;

3. The curtain wall has a certain micro-motion ability relative to the main structure on the plane.

history

Architectural decorative curtain wall has been used in building engineering as early as 150 years ago (1mid-9th century). Due to the limitation of materials and processing technology at that time, the curtain wall could not meet the requirements of absolute water tightness, air tightness, resistance to various natural external forces (such as wind, earthquake and temperature), thermophysical factors (thermal radiation and condensation), sound insulation and fire prevention.

Since the 1950s, due to the rapid development of building materials and processing technology, various types of building materials have been successfully developed, such as the invention of various sealants and the appearance of other sound insulation and fire-proof filling materials, which have well solved the index requirements of the building periphery for curtain walls and gradually become a new trend of contemporary exterior wall architectural decoration.

Nowadays, curtain walls are not only widely used in the external walls of various buildings, but also in the internal walls of buildings with various functions, such as communication rooms, TV studios, airports, major stations, gymnasiums, museums, cultural centers, hotels, shopping malls and so on.

In the future, due to the combination of curtain wall technology and technology, in response to the global call for energy conservation and emission reduction, intelligent curtain walls, such as solar photovoltaic curtain walls, ventilation and breathing curtain walls, and wind and rain sensing intelligent curtain walls, will show the unique charm of buildings.

development trends

1, from heavy to light plates and structures (natural stone is 25mm thick, and new material is the thinnest 1mm).

2. There are fewer kinds of plates and richer colors (at present, there are nearly 60 kinds of plates used in external walls, such as stone, ceramic plate, glass-ceramics, high-pressure laminated plate, cement fiber silk plate, glass, inorganic glass fiber reinforced plastic, clay plate, ceramic guard plate and metal plate).

3, higher safety performance

4. More flexible, convenient and fast construction technology

5. Higher waterproof performance prolongs the life of curtain wall (from closed curtain wall to open curtain wall).

6. Environmental protection and energy saving (the metal decorative insulation board commonly used in European and American construction markets now consists of aluminum-zinc alloy carved veneer with colored paint, polyurethane insulation layer and glass fiber cloth; Considering both decorative and thermal insulation functions, the finish 10- 15 years does not fade and the overall service life can reach 45 years; )

2 function introduction editing

perform

1, resistance to wind pressure deformation

2, rainwater leakage (water tightness)

3. Air permeability (air tightness)

4. In-plane deformation (earthquake resistance)

5, thermal insulation (insulation)

6. Sound insulation

7. Lightning protection law

8, fire prevention

9. Environmental protection

10, sound absorption

1 1, beautiful and decorative.

12, energy saving

superiority

1, light weight

Compared with the same area, the quality of glass curtain wall is about painted brick wall1/kloc-0 ~112, marble and granite facing wet construction wall115, and concrete hanging board1/. In general buildings, the mass of internal and external walls is about 1/4 ~ 1/5 of the total building weight. The use of curtain wall can greatly reduce the weight of the building, thus reducing the cost of foundation engineering.

2. Flexible design

The artistic effect is good. Architects can design various shapes according to their own needs, which can present different colors, coordinate with the surrounding environment and cooperate with lighting. , so that architecture and nature can be integrated and the oppressive feeling of high-rise buildings can be reduced.

3. Strong earthquake resistance.

Flexible design, strong wind and earthquake resistance, is the best choice for high-rise buildings.

4. System construction

Systematic construction is easier to control the construction period and takes less time.

5. Modernization

It can improve the novelty and sense of science and technology of buildings, such as photovoltaic energy-saving curtain wall, double-layer ventilation duct breathing curtain wall and other designs that match intelligent technology.

6. Easy to update and maintain

Because it is built on the outer structure of the building, it is very convenient to maintain or update.