ATTEN: Manager Liu
ADD: Longhua Development Zone, Jing County, Hengshui City, Hebei Province
High-rise steel structure building is a reflection of the economic strength and scientific and technological level of a family, and is often regarded as an important landmark building of a city. In super-high-rise buildings, some or all steel-bonded trusses are often used. The development of super-high-rise buildings reflects the improvement of science and technology level, material industry level and comprehensive technology level of our buildings. Since the 1980s, more than 80 high-rise steel structures have been built and under construction in China, with a total area of 6 million square meters and a steel consumption of more than 600,000 tons. Floor slabs and roofs of high-rise and super-high-rise buildings have great plane stiffness. They are plane lateral resistant members of vertical steel columns and shear walls or cylinders, which can coordinate the deformation of steel columns and vertical members. More than 10 high-rise steel buildings have been built and built in Beijing and Shanghai. For example, Shanghai Global Financial Center 101 floors, 492 meters high, 65,000 tons of steel, Zhongguancun Financial Center building area 110,000 square meters, 150 meters high, 150,000 tons of steel.
In the future, there will be 2 million square meters to 3 million square meters of high-rise steel structure construction in China every year, with a steel consumption of about 450,000 tons. In recent years, with the sustained development of large-span space steel structures, space structures such as space trusses and latticed shells have continued to develop in large quantities, not only for civil buildings, but also for industrial buildings, Airport gymnasiums, theatres, museums and so on. To develop new materials, structures, new technologies, new joints and new technologies for space steel-bonded structures, and to realize wind and seismic engineering construction of large-span and Super-large-span space steel structures. Looking forward to the future, we should open up and develop new, applicable and beautiful space steel structures in key and hot scientific and technological fields, and have the characteristics of medium-sized building structures in terms of scope of use, structural type and installation and construction methods. For example, hangzhou, Chengdu, Xi'an, Changchun, Shanghai, Beijing, Wuhan, Jinan, Zhengzhou and other airport terminal buildings, hangars, meeting centers and other buildings are all made of circular steel tubes and rectangular steel tubes as space trusses, arch frames and cable-stayed grid trusses. Their novel and modern style makes them the landmark of their central cities. Architecture of ambition.
According to the statistics of the Spatial Structure Branch of China Steel Structure Association, the production of latticed trusses and latticed shells has been in a steady state. 1500 trusses and latticed shells will be built every year, about 2.5 million square meters, and about 70,000 tons of steel will be used. The cable and membrane structures are at the stage of development and the consumption is not very large. Experts expect that they will increase at a rate of 20% annually. With the vigorous development of China's economic construction and the continuous improvement of people's living standards, according to actual needs, we will study, design, manufacture and install 150-200 meters, or even 200 meters long-span and super-span space steel structures in our school. Relative to the heavy steel structure, the light steel structure has the types of portal frame, arch corrugated steel roof structure, etc. The span of the building with steel quantity (excluding steel quantity) is not more than 40 meters per square metre, and the span of the building with steel quantity is more than 70 meters per square metre. The single or multi-span structure can be used, and the single-storey structure can also be used for the second storey. Or three-storey buildings, arch corrugated steel roof structure span is generally 8 meters, the weight per square metre is only 20 kg, an annual increase of about 1 million square metres, 40,000 tons of steel.
Portal frame and arch corrugated steel roof have corresponding design and construction regulations, special software and general atlas. Since the 1990s, the development of steel-bonded tendons has been very rapid. Especially, the construction of a high-rise building representing the city has opened a new page for the steel structure. If the world's third tallest Jinmao Building has been completed, it is now in operation. It is understood that the world's highest level of Shanghai Pudong Global Financial Center, 460 meters high, with a construction area of 310,000 square meters, is now accelerating construction. The foreign-invested Dalian Presidential Building, with 95 floors, is under intensive preparation and will rank among the highest in the world after completion. The development of light steel structure is in full swing, especially in the construction of industrial plant. It can be seen from the substantial increase in the number of steel structure manufacturing and construction enterprises. For example, the number of steel structure manufacturing and construction units in Shanghai has developed from dozens to more than 400 now, only Baosteel in Shanghai.