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Looking forward to the development of building curtain wall?
Looking forward to the development of building curtain wall, what is the specific content? Zhong Da Consulting will answer your questions below.

China building curtain wall starts from 1978. After nearly 30 years of development, especially the rapid development in the early 1990s, China has developed into the world's largest producer and user of curtain walls. 2 1 In the first five years of the century (200 1 -2005), the building curtain wall in China continued to develop rapidly.

In 2005, China produced (used) building curtain walls of about 4 150 square meters, accounting for about 80% of the world's 55 million square meters. By the end of 2005, China has installed about 200 million square meters of building curtain walls, accounting for more than half of the world's 325 million square meters. A number of large curtain wall enterprises have grown up in China, some with an annual output of over 6,543,800 square meters, and some with an annual output of 2,500,000 square meters. Their equipment level greatly exceeds that of well-known foreign curtain wall enterprises. Domestic curtain wall manufacturers have been able to provide various types of curtain walls for different buildings, and through competition with internationally renowned curtain wall enterprises, they have contracted large-scale foreign projects. Domestic enterprises occupy about 80~90% of the domestic market, and overseas companies (including Hong Kong, Macao and Taiwan companies) occupy less than 20% of the market. In recent years, various new levels of domestic architecture have provided a solid foundation for the development of building curtain walls. During the development of building curtain wall for more than 20 years, China has trained a large number of curtain wall technical talents, with doctors and masters as the backbone. They not only successfully designed curtain walls for many large-scale projects, but also made many significant achievements in the field of curtain wall testing and theoretical research. This team of thousands of people is distributed in curtain wall production enterprises, professional testing institutions (testing centers), universities and research institutes. They are the backbone of curtain wall technology in China.

After more than 20 years' severe test, the quality of building curtain wall in China, Xiamen 99 14 typhoon, the gust wind speed reached 46m/s, and it hovered in Xiamen for more than 8 hours. In Xiamen, more than 70,000 street trees collapsed, outdoor billboards almost fell out, and more than 70% of bus shelters were blown down, but the main structure of the curtain wall was intact, and only a few glass plates were damaged by flying sand and stones and billboards. Some fans were torn off because they were not closed or because of the quality of the lock, and several aluminum plates in the corner fell off. The 400T-m tower crane of Xiamen Convention and Exhibition Center was dumped and scrapped, and the tens of thousands of m2 stone curtain walls installed in the Convention and Exhibition Center were intact. In 2004, Typhoon Yunna landed in Zhejiang, causing huge losses. However, in Taizhou, located in the center of the typhoon, only a few pieces of glass were broken and some aluminum plates fell off.

Although the building curtain wall was developed from abroad and spread to China, we have accumulated rich experience in production and use because of the large number of building curtain walls produced and used in China. Thousands of physical performance tests and seismic tests have been carried out during the construction of these building curtain walls, revealing the inherent laws of building curtain walls. On the basis of summing up production experience and scientific experiments, we have carried forward the tradition of cooperative management in Industry-University-Research, which has been formed in China. In addition to curtain wall manufacturers and professional testing institutions (testing centers) summarizing production experience and testing results, many domestic research institutes and universities (including affiliated research institutes) have conducted multidisciplinary research on building curtain walls, upgraded the above production experience and testing results to scientific theories, put forward a large number of research reports, and developed a large number of new technologies, new testing methods, new processes and new theories (design principles). China is a country that systematically studies and tests the seismic performance of building curtain walls in the world, and has formulated the only national standard "Shaking table test method for seismic performance of building curtain walls". Our country has carried out a series of tests on the cable system of cable-strut structure, and obtained a large number of test parameters, which makes our country have a systematic understanding of the mechanism of cable-strut structure and self-balancing cable-strut structure. Wuhan Lingyun and Huazhong University of Science and Technology jointly carried out the thermal measurement of the double curtain wall model house, Zhongshan Sheng Xing and South China University of Technology jointly carried out the thermal and aerodynamic research and software development of the double curtain wall, Shenzhen Fangda and Huazhong University of Science and Technology jointly carried out the thermal performance research of the double curtain wall, Shenzhen Sanxin and Shenzhen Engineering Institute jointly carried out the transparent single curtain wall and the solar control coated single glass curtain wall. The continuous solar radiation thermal measurement records of three model houses with double-layer transparent glass curtain walls for one year (365 days) reveal the system parameters of the influence of solar radiation on double-layer (single-layer) curtain walls, which makes the research and development of double-layer curtain walls in China more in-depth and systematic than other countries that developed double-layer curtain walls earlier. Great progress has been made in the development of new technology of building curtain wall in China. The prestressed parallel cable net glass daylighting roof (54m×30m) of Shenzhen Citizen Center Museum is the first prestressed cable net roof structure without concave curve in the world. The hyperboloid metal glass roof of the National Grand Theatre, the large all-glass roof of the greenhouse of Beijing Botanical Garden, the 82,000 square meter point-supported glass curtain wall of Baiyun Airport and the 90m×60m single-layer cable net glass curtain wall of the new Poly Building are all the best in the world.

Looking back on the development of building curtain walls in China, most curtain walls used in China's early years were built by overseas enterprises, and all or most of their main raw materials, aluminum and glass, were imported. China curtain wall (building materials) enterprises grew up from scratch in the competition with foreign enterprises. Under the favorable conditions of decades of development experience and experience, overseas enterprises compete with China curtain wall enterprises with nothing (knowledge), but failed to stop China curtain wall enterprises from developing vigorously, and their market share never exceeded 20%. This is because the curtain wall enterprises in China regard technology development as their survival from the very beginning, so they have mastered curtain wall technology in just over twenty years, and with the development of the situation, they have been constantly developing new products to meet the needs of the situation, which can be produced not only at home, but also abroad. Because this process is quite short, most curtain wall technicians in China are very young, and because of the traditional viewpoint (system), they can't compare with foreign enterprises in original innovation. Most of the curtain wall varieties and technologies currently used in China are imported from abroad, which is the key problem to be solved in our future development, that is, there must be original curtain wall varieties (technologies) in China, as well as major curtain wall materials such as aluminum and glass. In other words, all kinds of glass in the world can be produced in China, and the equipment imported from China is products from the 1990s, a large part of which is more advanced than foreign countries. However, due to poor management and technical level, the quality and variety of products are worse than those of similar foreign enterprises, especially if they can't independently develop new varieties, they will be subject to people by introduction. In the future, we should pay attention to improving the management level and technical level, especially to original innovation and independent development of new varieties and technologies with independent intellectual property rights. Although China has established a relatively perfect 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 reflection of glass curtain wall on harmful light, the national standard "Optical Performance of Glass Curtain Wall" GB/T 1809 1-2000 has been published for more than five years, and many provinces and cities don't even know this national standard.

Curtain wall products are basically traditional industrial products or labor-intensive industries. China has an advantage in labor cost, and it will also have a competitive advantage in the world in the next few years. It has been pointed out that the consumption of building curtain walls in other parts of the world is about half that of China, and the development of domestic curtain wall enterprises is still based on the domestic battlefield, or they can go abroad, such as the former Soviet Union, Asia and Africa. If conditions permit, it can enter the European and American markets appropriately and win 10-20% of the market, which is very small compared with the domestic market. Although we can't ignore foreign markets, we should know that only by participating in foreign market competition can we improve our curtain wall.

The state plans to change the energy structure of China, so that solar energy, wind energy and other renewable energy will account for about 4% of the total power generation. The Outline of the Tenth Five-year Plan for Building Energy Conservation of the Ministry of Construction proposes to develop and utilize renewable energy such as solar energy, geothermal energy, groundwater and wind energy. A total of 80 million square meters of solar energy buildings and 5 million square meters of other renewable energy buildings have been built. He pointed out that the glass curtain wall should be developed from energy-consuming building to "productive" building. Using photovoltaic power generation technology is to develop photoelectric curtain wall, so that glass curtain wall can not only "light up" but also "electrify".

In 2005, the state issued the Design Standard for Energy Efficiency of Public Buildings (GB50 189-2005). The release of this standard is both a challenge and an opportunity for building curtain walls in China. The energy-saving design requirements put forward in the Standard for Energy-saving Design of Public Buildings will increase the cost of curtain walls and reduce the amount of curtain walls. However, the state also proposes to use the existing building curtain wall (about 200 million square meters). It is required to be completed before 2020 (that is, the renovation of about100,000 square meters per year), so that we can predict that the consumption of building curtain walls (including energy-saving renovation) in China will be between 40 million and 50 million square meters from 2006 to 2020.

2 1 century, China has joined the WTO, and time waits for no one in the competition of economic globalization. We must innovate independently and develop our curtain wall technology according to the principle of keeping pace with the times and pioneering and innovating. The history of the world building curtain wall tells us that most of the new curtain walls are created by architects and finally realized by curtain wall engineers. Architects should stand at the forefront of the development trend of building curtain wall and lead the healthy development of this trend. Science always seeks, discovers and understands new phenomena in the objective world, studies and grasps new laws, and always pursues the truth unremittingly. Science is serious, rigorous, realistic and creative at the same time. 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 feature of scientific activities, especially natural science activities, is continuous progress. Even if there is retrogression in other aspects, science will always make progress, even if it is slow and difficult, which shows that natural science activities contain the most progressive factors of human beings.

China's curtain wall technology should learn from the strengths of the world, make up for the shortcomings of China, and create a new China. Innovation includes theoretical innovation, institutional innovation, scientific and technological innovation and other innovations. Innovation includes not only major scientific and technological breakthroughs, but also moderate or even minor technological progress. The development of building curtain wall in China in the new century should be:

1. Plan according to the requirements of the production generation, development generation, research generation and conception generation. The short-term planning (1-3 years) focuses on development planning, while the medium-and long-term planning (4- 10 years) focuses on development and conceptual planning, laying the foundation for the sustainable development of curtain wall technology and production. This plan is not a simple production development plan, but its core should be a scientific and technological innovation plan.

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