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Analysis of the architectural characteristics of steel structures
In steel structure engineering, Junzheng Steel's structural engineering technology is mainly made of steel, and consists of steel beams, steel columns, steel trusses and other components made of steel and steel plates. Welds, bolts or rivets are used between each component or component. The connected structure is one of the main types of building structures.
结构 The structure made mainly of steel is one of the main types of building structures. Steel is characterized by high strength, light weight, good overall rigidity, and strong deformation capacity, so it is particularly suitable for building large-span, ultra-high, and ultra-heavy buildings; it has good homogeneity and isotropy, and is an ideal elastomer. , Which best meets the basic assumptions of general engineering mechanics; the material has good plasticity and toughness, can have large deformation, and can well withstand dynamic loads; the construction period is short; it has a high degree of industrialization, and can be specialized in production with a high degree of mechanization. In the future, steel structures should study high-strength steels to greatly increase their yield point strength. In addition, new types of steels, such as H-shaped steel (also known as wide-flange steel), T-shaped steel, and profiled steel plates, are rolled to adapt to large-span structures. And the needs of super high-rise buildings.
In addition, there is a heat-resistant bridge light steel structure system. The building itself is not energy-efficient. This technology uses clever special connectors to solve the problem of cold and hot bridges in the building. The small truss structure allows cables and water pipes to pass through the wall for construction. Decoration is convenient; extremely energy-efficient is the only building system in the world to build 7-story residential buildings with cold-formed thin-walled steel.
Advantages and disadvantages of steel structure
1. High material strength and light weight
Steel has higher strength and higher elastic modulus. Compared with concrete and wood, the ratio of density to yield strength is relatively low. Therefore, under the same load conditions, the steel structure has a small cross-section, light weight, easy transportation and installation, suitable for large spans, high heights, and heavy loads Structure.
2, steel toughness, good plasticity, uniform material, high structural reliability
Suitable to withstand shock and dynamic loads, with good seismic performance. The internal structure of the steel is uniform, which is close to an isotropic homogeneous body. The actual working performance of steel structures is more in line with calculation theory. Therefore, the steel structure has high reliability.
3. High degree of mechanization in steel structure manufacturing and installation
Steel structural components are easy to manufacture in factory and assembled on site. The factory mechanized manufacture of steel structure components has high precision, high production efficiency, fast construction site assembly, and short construction period. Steel structure is the most industrialized structure.
4. Good sealing performance of steel structure
Because the welded structure can be completely sealed, it can be made into high-pressure vessels, large oil tanks, pressure pipes, etc., which have good air tightness and water tightness.
5.Steel structure is heat resistant but not fire resistant
When the temperature is below 150 ° C, the properties of the steel change little. Therefore, the steel structure is suitable for thermal workshops, but when the surface of the structure is exposed to heat at about 150 ° C, it is necessary to protect it with a heat shield. When the temperature is between 300 ° C and 400 ° C. The strength and elastic modulus of the steel are significantly reduced. When the temperature is around 600 ° C, the strength of the steel tends to zero. In buildings with special fire requirements, steel structures must be protected with refractory materials to improve fire resistance.
6. Poor corrosion resistance of steel structure
Especially in the environment of moist and corrosive media, it is easy to rust. Generally, steel structures need to be derusted, coated with zinc or paint, and regularly maintained. For offshore platform structures in seawater, special measures such as "zinc block anode protection" are used to prevent corrosion.