Looking forward to the development of architectural curtain walls?

Looking forward to the specific content of the development of building curtain walls, Zhongda Consulting will answer the questions below.

my country's architectural curtain walls started in 1978. After nearly 30 years of development, especially the rapid development in the early 1990s, by the beginning of the 21st century, our country has developed into the world's number one curtain wall manufacturer. Great powers and great powers of use. In the first five years of the 21st century (2001-2005), my country's architectural curtain walls continued to develop rapidly.

In 2005, my country produced (used) approximately 4,150 square meters of building curtain walls. That year, the production (usage) of building curtain walls accounted for about 80% of the world's 55 million square meters. By the end of 2005, my country had installed the most About 200 million square meters of building curtain walls have been constructed, accounting for more than half of the world's total of 325 million square meters. A number of large-scale curtain wall companies have grown up in our country, some of which have an annual output of more than 1 million square meters, and some of which have reached 2.5 million square meters. Their equipment level greatly exceeds that of well-known foreign curtain wall companies. Domestic curtain wall manufacturers have been able to provide various types of curtain walls required for various buildings, and have contracted large-scale foreign projects by competing with internationally renowned curtain wall companies. Domestic companies account for about 80-90% of the domestic market, while overseas companies (including companies from Hong Kong, Macao and Taiwan) occupy less than 20% of the market share. In recent years, various new levels of domestic construction have provided opportunities for the development of building curtain walls. Solid foundation. In the development process of architectural curtain walls for more than 20 years, our country has cultivated a large number of curtain wall technical talents. This talent team is composed of doctors and masters. They have not only successfully designed the curtain walls of many large-scale projects, but also conducted curtain wall experiments and theoretical research. There are many significant achievements in the field. This team of thousands of people is distributed in curtain wall manufacturing companies, professional testing institutions (testing centers), universities, and scientific research institutes. They are the backbone of my country's curtain wall technology.

The quality of my country's building curtain walls has been severely tested for more than 20 years. Xiamen City Typhoon No. 9914, with gust wind speed of 46 meters/second, hovered in the Xiamen area for more than 8 hours, and 70,000 street trees in Xiamen City were downed. Many trees and outdoor billboards almost fell off, and more than 70% of the bus shelter was blown down. However, the main structure of the curtain wall was intact. Only a few glass panels were damaged by the impact caused by flying sand and rocks and the collapse of the billboard, and some of them were opened. The fan was not closed or was torn off due to the quality of the lock. A few aluminum plates fell off at the corners. The 400T-m construction tower crane of the Xiamen Convention and Exhibition Center fell over and was scrapped. However, the tens of thousands of m2 stone curtain walls that have been installed in the Convention and Exhibition Center are intact. In 2004, Typhoon Yunna made landfall in Zhejiang, causing huge losses. However, in the urban area of ??Taizhou, located at the center of the typhoon, only a few windows were broken and some aluminum plates fell off.

Although the architectural curtain walls were developed and introduced to our country from abroad, because our country has produced and used such a large number of architectural curtain walls, it has accumulated rich experience in production and use. When constructing these architectural curtain walls, Thousands of physical performance tests and seismic tests have been carried out to reveal the inherent laws of building curtain walls. On the basis of summarizing production experience and scientific experiments, we have carried forward the tradition of coordinated cooperation between industry, academia and research that has been formed in our country. In addition to curtain wall manufacturers, In addition to summarizing production experience and test results by professional testing institutions (testing centers), many scientific research institutes and universities (including affiliated research institutes) across the country have conducted multidisciplinary research on building curtain walls, and have upgraded the above production experience and test results to Scientific theories, a large number of research reports, and a large number of new technologies, new detection methods, new processes and new theories (design principles) have been developed.

Our country is the country in the world that conducts systematic research and seismic tests on the seismic performance of building curtain walls, and has formulated the world's only national standard "Shaking Table Test Method for the Seismic Performance of Building Curtain Walls"; our country has conducted A series of tests obtained a large number of test parameters, which enabled my country to have a systematic understanding of the mechanism of tensioned cable-rod structures and self-balancing cable-rod structures; Wuhan Lingyun and Huazhong University of Science and Technology jointly conducted thermal measurements on a double-layer curtain wall model house. Zhongshan Shengxing and South China University of Technology jointly conducted research and software development on double-layer curtain wall thermal engineering and aerodynamics, Shenzhen Fangda and Huazhong University of Technology jointly conducted research on the thermal performance of double-layer curtain walls, Shenzhen Sanxin and Shenzhen Jianke The institute jointly conducted one-year (365 days) continuous solar radiation heat measurement records of three model houses of transparent single-layer curtain wall, solar control coated single-layer glass curtain wall, and double-layer transparent glass curtain wall, revealing the impact of solar radiation on double (single) layer curtain walls. The system parameters make our country's research and development of double-skin curtain walls more in-depth and systematic than other countries that developed double-skin curtain walls earlier. Our country has made great progress in the development of new technologies for building curtain walls. The Shenzhen Civic Center Museum (54m×30m) prestressed parallel chord cable net glass lighting roof is the world's first prestressed glass lighting roof without concave curves that was independently developed by our country. The stress-cable roof structure, the hyperboloid metal and glass roof of the National Center for the Performing Arts, the large all-glass roof of the Beijing Botanical Garden greenhouse, the 82,000 square meter point-supported glass curtain wall of Baiyun Airport, and the 90m×60m single-layer cable mesh glass curtain wall of the New Poly Building are all world-class innovations. The best in the world, it marks that our country's architectural curtain walls have begun to enter a new stage of China's creation.

Looking back at the development of curtain walls in my country, most of the curtain walls adopted in my country’s early days were constructed by overseas companies, and all or most of their main raw materials, aluminum and glass were imported. China’s curtain walls (building materials) Enterprises grow from scratch in competition with foreign enterprises. Foreign enterprises, with their decades of development experience and favorable conditions, compete with Chinese curtain wall enterprises with nothing (knowledge) and cannot stop Chinese curtain wall enterprises. is booming, and its market share has never exceeded 20. This is because Chinese curtain wall companies have regarded technology development as the basis of their survival from the beginning. In this way, they have mastered curtain wall technology in just over 20 years. As the situation develops, they continue to adapt to the situation and develop new products. Not only do they China has everything that is available abroad, and it can be produced in China, and it can do things that are not available abroad, and China has them. Since this process is quite short, most of China's curtain wall technicians are very young, and due to the constraints of traditional views (systems), they are not as good as foreign companies in original innovation. Most of the curtain wall varieties and technologies currently used in our country are from Imported from abroad, this is a problem that we must focus on solving in future development, that is, China must have its own original and innovative curtain wall varieties (technologies). Similarly, the main materials of curtain walls such as aluminum, glass, etc. also have similar situations as above, that is, some of the glass in the world All kinds of products can be produced in China. The equipment introduced in China are all products from the 1990s. Most of them are more advanced than abroad. However, due to slightly inferior management and technical levels, the quality and variety of products are worse than those of similar foreign companies, especially their own. If you cannot independently develop new varieties, you will be controlled by others if you rely on introduction. In the future, we should focus on improving management and technology levels, paying special attention to original innovation and independent development of new varieties and new technologies with independent intellectual property rights. Although my country has established a relatively complete technical standard system for building curtain walls, the publicity and implementation of technical standards are not in place. For example, in order to limit the harmful light reflection of glass curtain walls, the national standard "Optical Performance of Glass Curtain Walls" GB/T18091-2000 was compiled. It has been more than five years since the standard was released. Many provinces and cities, including construction management departments, environmental management departments, and courts, do not know that this national standard exists.

Curtain wall products are basically traditional industrial products or labor-intensive industries. my country has an advantage in labor costs and will have a competitive advantage worldwide in the next few years.

It has been pointed out earlier that the amount of building curtain walls in other parts of the world is about half of that in China. The development of domestic curtain wall enterprises is still based on the domestic battlefield. They can also develop abroad, such as the former Soviet Union, Asia, and Africa. If conditions permit, they can be appropriate. Entering Europe and the United States, we can capture 10-20 of the markets, which is very small compared with the domestic market. Even so, we cannot ignore foreign markets. We must know that only participating in foreign market competition is the most important way to improve our country's curtain wall technology.

The national plan is to change my country’s energy structure so that renewable energy power generation such as solar energy and wind energy will account for about 4% of the total power generation. The Ministry of Construction's "Tenth Five-Year Plan" for building energy conservation proposes to develop and utilize renewable energy sources such as solar energy, geothermal energy, groundwater, and wind energy. A total of 80 million square meters of solar buildings have been built, and 5 million square meters of buildings using other renewable energy sources. He pointed out that the glass curtain wall should develop from an energy-consuming building to a "capacity-producing" building. The use of photovoltaic power generation technology means the development of photoelectric curtain walls, so that the glass curtain walls can rely on solar energy for electricity. The glass curtain walls not only "light up" but also "power up".

In 2005, the state released the "Public Building Energy Efficiency Design Standard" GB50189-2005. The release of this standard is both a challenge and an opportunity for my country's building curtain walls. Public Building Energy Efficiency Design Standards The proposed energy-saving design requirements will increase the cost of curtain walls and reduce the amount of curtain walls. However, the state also proposes to carry out energy-saving renovation of existing building curtain walls (about 200 million square meters) and requires it to be completed by 2020 (that is, about 1,000 square meters of curtain walls will be renovated each year). Thousands of square meters), so we can predict that the amount of curtain wall usage (including energy-saving renovation) in my country from 2006 to 2020 will be between 40 and 50 million square meters.

In the 21st century, our country has joined the WTO. In the competition of economic globalization, time waits for us. We must follow the guidelines of advancing with the times and pioneering and innovating, independently innovating and developing our country's curtain wall technology. . The history of the development of architectural curtain walls in the world tells us that most new curtain walls are created by architects and finally realized by curtain wall engineers. Architects must stand at the forefront of the development trend of architectural curtain walls and lead the healthy development of this trend. Science always seeks, discovers, and understands new phenomena in the objective world, studies and masters new laws, and always pursues truth unremittingly. Science is serious, rigorous, and pragmatic. At the same time, science is creative. One of the basic attitudes of science is questioning, and the most basic spirit of science is criticism. Compared with other human activities, the basic characteristic of scientific activities, especially natural science activities, is continuous progress. Even when other aspects are regressing, science will always make progress, even if it is slow and difficult progress. This shows that Natural science activities contain the most progressive elements of mankind.

Our country’s curtain wall technology must learn from the world’s strengths, make up for China’s shortcomings, and create something new for China. Innovation includes theoretical innovation, institutional innovation, scientific and technological innovation and other innovations. Innovation includes not only major technological breakthroughs, but also medium or even small technological progress. The development of curtain walls in my country in the new century must:

1. There must be a plan. This plan must follow the requirements of producing one generation, developing one generation, researching one generation, and conceiving one generation. The short-term plan (1-3 years) ) The main content is development planning, and the medium- and long-term planning (4-10 years) is mainly for research and development, conceptual planning, which lays the foundation for the sustainable development of curtain wall technology and production. This plan is not simply a production and development plan, its core should be a scientific and technological innovation plan.

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