Yesterday membrane structure membrane structure is made of high-strength film material and a reinforcing member (steel, steel columns or cable) have some pre-tensile stress a certain way to make it through some kind of internal space to form the shape of the structure as a cover, and can withstand spatial structure of a certain form of external loads, and its shape is very graceful and flexible. Membrane structure since the 1990s, the rise in our country, with its novel and simple form, the material properties of high strength and very light weight, established its important role in the building structure, and its related research and application by many researchers attention and favor. China Academy of Building Research Professor sky recalled the 10 years of development and the process of membrane structures established in China Steel Association membrane structure of the Commission. Blue said that with the membrane structure is widely used in our country, the industry urgently needs a trade organization to manage, organize academic exchanges, and then Japan, Australia have established a membrane structure association. According to the Association blue membrane structure introduced in view of the prevailing conditions, insight that the most convenient and fast way is a professional organization established on the basis of a membrane structure Steel Association China Branch of the spatial structure. December 6, 2002, the Commission CISA membrane structure was established, the meeting discussed and adopted the membrane structure CISA Committee regulations. Blue said the development of the film industry's structure inevitably mixed, many units can not distinguish between the level of enterprise technology, "trial membership level membrane structure system" is the idea CISA committee established at the beginning of the film, there's structure. However, in China, the industry is qualified by the government, and in many times with the competent departments to reflect the situation to no avail, CISA membrane structure committee with reference to foreign trade association experience, the proposed level of membership management practices, and actively supported enterprises. Since its start in May 2003 enterprise-class membership qualification membrane structure work, as of now, CISA membrane structure level committee has 79 members, including level 12, two 26, three 41. Because of the need for regular membership levels re-evaluation, the members are in accordance with higher standards to improve the management level and technical level, so that the membrane structure CISA industry management committee can be effective. According to Liu Yi introduction, CISA membrane structure committee was set up under the initiative of the blue sky. Membrane structure today many people know the "Water Cube" represents the membrane structure, in fact, as the 2008 Olympic Games opening and closing ceremonies stadium "Bird's Nest" is also a representative of the membrane structure of the project. Served as deputy director of the 2008 Project Construction Headquarters Office of the Gang to help China Steel Structure Association given during the Olympic construction projects expressed heartfelt thanks. Gang said the Beijing Municipal Commission of Housing and Urban-Rural Development will support the development of steel industry. According to Professor of Civil Engineering Department of Shanghai Jiaotong University Gong Jinghai, as early as the 1960s and 1980s, flat air-supported roof membrane structure in the United States, Japan, Canada and other countries (regions) has been widely used due to its high roof vector resulting in lower accumulation of rain and snow, causing partial or whole collapse accident. Since then, people with a high Oya make rain and snow fall classes quickly cylindrical or spherical inflatable membrane structure, and has been widely used.龚景海 said that due to the inflatable membrane structure is the only building materials using the free - air as a support structure, with the following seven characteristics compared with other structures in the form of inflated membrane structure: first, the economy. Inflatable membrane structure and low cost, especially for large-span, poor geological conditions of the situation more price advantage. Inflatable membrane structure is only free air as the supporting structure, eliminating the cost of conventional rigid support structure; basis inflatable membrane structure is only exposed to the buoyancy of the film body, the foundation bearing capacity without any requirements. And the unit cost does not change with the increasing of the span is large space most economical solution. Membrane material itself has a self-cleaning, high-strength, durability, fire resistance and other properties, according to the choice of different membranes, the age between 10 years to 30 years, using the term endometrial material is maintenance free; Even in the course there are local damaged, repair is easy and no fee. Second, short construction period. Membrane structure from design to construction only one month to two months to complete, and most are done in the factory, on-site installation takes 10 to 15 days. Third, the large span large spaces. Currently, the membrane structure can be made 300 m (length) × 150 m (width) × 50 m (H) of continuous large column-free space, from golf driving range to cover a large area of ??several football fields. Fourth, can be moved as a whole. Inflatable membrane structure is very easy to remove and install, easy to move a whole. Fifth, airtight performance. Film material is cloth, polyester coating and the surface layer, and therefore the membrane material itself has a good air tightness and water tightness. Used with dust, toxic gases, such as storage warehouse and processing plant, with good environmental performance. Sixth, energy saving and environmental protection. The film is a material with a certain light transmittance, can not use artificial lighting during the day; using bilayer plus membrane structure consisting of insulating material with good insulation properties, is a conventional building energy consumption of about 1/3. Membrane material itself can be recycled in the process of construction and demolition almost no construction waste and environmental pollution. Seventh, modern fashion. Membrane structure from the membrane material to a high technological content design, installation, known as the 21st-century building, representing the high-tech building; membrane structure stylish, elegant and modern, can often get unexpected architectural landscape effect. As the inflatable membrane structure has unique advantages over other forms of incomparable architectural structure, currently in China is widely used in sports, exhibitions, cultural, industrial, agricultural and military fields. Membrane structure tomorrow China Steel Structure Association branch chairman Zhang Yigang spatial structure through the 2012 Yeosu Korea World Expo 2012 London Olympics, the World Cup stadium construction in 2014 will be held in Brazil analysts believe that the membrane structure will continue to broaden its range of applications. According to Zhang Yigang introduced, Korea Yeosu Expo International Pavilion roof symbolizes the shape of the waves and the islands of Yeosu, with steel frame supported membrane structure. Total roof 11 "islands", seven different size and shape. Among them, the youngest is 14 m × 14 米 × 5.3 meters and weighing about 95 kg; maximum of 22 m × 18 米 × 7.8 meters and weighing about 203 kg. Zhang Yigang said, "islands" on both the shape of the roof, and has vents in its interior, which took on the task of natural ventilation hall, both inside and outside of its titanium dioxide translucent PVC film. Xue Su duo made seven ideas for future work in the Third Committee of the membrane structure Steel Association Professional Committee: First, standardize and improve the level of the membrane structure membership system; second is to promote the work of project managers, project managers improve by conducting work-related training management and technical level; Third, improve technical regulations in a timely manner to carry out the preparation of project quality standards; Fourth, to further strengthen the work of technical seminars membrane structure; five are actively training of professionals, universities and enterprises take advantage of a platform; six further strengthen the membrane structure Steel Association Committee technical advisory services to meet the needs of the industry; seven are actively cooperate with 2013 Branch of China Steel Association spatial structure of the 20th anniversary activities, and the establishment of special venue membrane structure, summing up the historical exchange membrane structure, development future.