I. The primary control target has shifted to ensuring market demand for steel structures. Since the second half of last year, the continued decline in various macroeconomic indicators has caused concern and worry among decision-making departments. Statistical data show that GDP has been declining quarter by quarter for more than a year, with cumulative growth of 9.2% in 2011, a decrease of 1.2 percentage points compared to the previous year. Fixed asset investment and industrial added value have also experienced a significant decline. The actual growth rate of fixed asset investment in 2011 (excluding the price increase of investment goods) was only 16.1%, far lower than the previous growth rate of more than 20%; the industrial added value in December last year fell to...

According to a report by China News Service, Qiu Baoxing, vice minister of China's Ministry of Housing and Urban-Rural Development, stated on October 21 that China's urban construction has many shortcomings: roads and intersections all look the same, building styles are similar, landmark buildings lack cultural heritage, squares are large and impractical, historical blocks are demolished indiscriminately, flood control standards are raised blindly without regard for cultural preservation, and urban edges are dirty, messy, and unfriendly. He said, "If all towns follow the same model, that's very dangerous." Qiu Baoxing further commented: "Our next generation, standing on a tall building, looking at the Yangtze River to the north and south, will see that all towns follow the same model."

During my tenure as the Party Secretary at the Chinese Research Academy of Environmental Sciences, through several investigations, I felt that the work of the Environmental Engineering Assessment Center (hereinafter referred to as the "Assessment Center") under the Ministry of Environmental Protection was extremely important. It serves as a technical support unit for government management departments in reviewing construction projects. Construction project environmental management refers to the activities undertaken by the state to supervise and manage development and construction activities using various means to avoid or reduce the adverse impacts of these projects on the environment. It is an important component of national environmental management. Therefore, through investigations, I proposed the strengthening of the Assessment Center, to develop and expand it from its previous status as a department within the Research Academy...

In 2011, China's steel production reached a record high of 627 million tons. With unprecedented pressure to conserve energy and reduce emissions, and the advocacy of a low-carbon economy and sustainable development, steel-structured housing has received widespread attention from all sectors of society. During this year's Two Sessions, many representatives offered suggestions on promoting the development of steel-structured housing. What are the actual values of steel-structured housing? Let's do some calculations on steel structures. Achieving low-carbon construction and sustainable development of residential buildings Steel-structured housing is a green building of the 21st century and an effective way for China to reduce carbon emissions and promote sustainable development. Low-carbon construction: CO2 emissions from building steel-structured housing

Composite color-coated steel plates are classified into four categories according to the core material: polystyrene color-coated steel sandwich panel, rock wool color-coated steel sandwich panel, polyurethane color-coated steel sandwich panel, and phenolic color-coated steel sandwich panel. I. Scope of application Color-coated steel sandwich panel is a multi-functional new type of building material, which has the characteristics of heat preservation, heat insulation, sound insulation, light weight, waterproof, earthquake resistance, and decoration. It is widely used in non-load-bearing walls, roofs, ceilings of industrial and civil buildings, and load-bearing wall panels of single-layer combined houses. It is mainly used for partitions and ceilings in clean workshops of electronics, chemicals, medicine, biology, food, and hygiene. II. Specifications and performance of color-coated steel sandwich panels This color-coated steel sandwich panel,

Steel structure reticulated shell structure Steel structure reticulated shell structures are currently commonly used roof forms for large-scale stadiums, industrial plants, theaters, waiting halls and other buildings in China. This new style of structure relies on the load-bearing capacity of the steel itself, connecting steel columns together with bolted spheres to form a crisscross support, forming roof spaces of various shapes. From small meeting rooms of a few meters to industrial plants with spans of hundreds of meters, these are all suitable ranges for spatial reticulated shell structures. 1. The steel structure reticulated shell structure has a free and expansive form. It incorporates both the rhythmic beauty of classical architecture and the romanticism of modern sculptural art. Therefore,

Steel Structure Symbols 1. Function and design values of action effects F - Concentrated load; H - Horizontal force; M - Bending moment; N - Axial force; P - Pre-tightening force of high-strength bolts; Q - Gravity load; R - Support reaction; V - Shear force. 2. Calculation indicators E - Elastic modulus of steel; Ec - Elastic modulus of concrete; G - Shear modulus of steel; Nat - Design value of tensile capacity of individual anchor bolts; Nbt, Nbv, Nbc - Design values of tensile, shear and bearing capacity of a bolt; Nrt, Nrv, Nrc

I. Steel Structure Terminology 1. Strength: The ability of a member's cross-section material or connection to resist failure. Strength calculation is the calculation to prevent the failure of structural members or connections due to exceeding material strength. 2. Load-carrying capacity: The maximum internal force that a structure or component can withstand without failure due to strength, stability, or fatigue; or the maximum internal force when a plastic analysis forms a failure mechanism; or the internal force when deformation reaches a state unsuitable for continued load bearing. 3. Brittle fracture: Generally refers to the brittle fracture that occurs suddenly in a steel structure under tensile stress without any warning plastic deformation. 4. Strength standard value: National standard