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Design style is flexible and abundant In the case of the same beam height, the opening of the steel structure can be 50% larger than the opening of the concrete structure, making the building layout more flexible.
The light weight of the structure is lighter than the self-weight of the concrete structure, and the reduction of the structure's own weight reduces the internal forces of the structural design, so that the foundation structure treatment requirements of the building structure are low, the construction is simple, and the construction cost is reduced.
High structural stability Highly hot-rolled H-shaped steel structure, scientific and reasonable structure, good plasticity and flexibility, high structural stability, suitable for building structures subjected to vibration and shock loads, strong ability to resist natural disasters, especially Applicable to some buildings with multiple earthquake zones. According to statistics, steel structures dominated by H-shaped steels have suffered the least damage in the world with more than seven devastating earthquake disasters.
Increase the effective use of the structure area Compared with the concrete structure, the column area of ​​the steel structure is small, which can increase the effective use of the building area, depending on the form of the building, can increase the effective use of the area of ​​4-6%.
Compared with welded H-shaped steel, the provincial workers can save labor and materials, reduce the consumption of raw materials, energy and labor, have low residual stress, and have good appearance and surface quality.
Easy to machine, easy to connect and install, easy to remove and reuse.
Environmental protection using H-shaped steel can effectively protect the environment, specifically in three aspects: First, compared with concrete, dry construction can be used, resulting in less noise, less dust; Second, due to reduced weight, foundation construction less soil, The destruction of land resources is small, in addition to a substantial reduction in the amount of concrete, to reduce the amount of stone to open the mountain, is conducive to the protection of the ecological environment; Third, after the expiration of the service life of the building structure, the amount of solid waste generated after the demolition of the structure is small, the recycling value of scrap resources high.
High degree of industrialization High degree of industrialization of hot-rolled H-shaped steel structure, high degree of industrialization, ease of mechanical manufacturing, intensive production, high precision, easy installation, easy to guarantee quality, can be built into a real housing production plant, bridge production plant, industrial Factory production factory. The development of steel structures has created and stimulated the development of hundreds of new industries.
The construction speed of the project is small, and it is suitable for all-weather construction and is affected by the weather conditions. The construction speed of the steel structure made of hot-rolled H-shaped steel is about 2-3 times of the construction speed of the concrete structure, the capital turnover rate is doubled, the financial cost is reduced, and the investment is saved. Taking the “Jinmao Building†in Pudong, Shanghai, the “highest building in China†as an example, the main body with a body of up to 400m in length completed the structural capping in less than half a year, while the steel-concrete structure required a two-year duration.
The high-frequency current is used to locally heat the metal surface and weld it under external force. Without any welding wire or flux, it can be continuously mass-produced.
Advantages 1. High dimensional accuracy of cross-section Due to the use of high-quality steel coils, the shape accuracy of the cross-section after welding is excellent, making it easier to assemble the structure. 2. Excellent cross-section performance The ratio of the thickness of the flange plate to the web can be increased, compared with the rolled steel. Than, under the same weight can be made of greater bending performance, higher cross-section performance of the components; in the same cross-section performance, the member is lighter. 3 cross-section size can be customized according to user requirements in large quantities, can be specified by the user The cross-section size produces.4. The metallurgical structure of the welded joints homogeneously dissolves the material of the web material and the flange plate material.
use:
Railway station canopy, steel structure plant, public building, steel structure residence, airport exhibition hall, light rail subway guardrail, industrial equipment support, greenhouse and farm, livestock farm, membrane structure and network structure construction project.
High-frequency welding H-shaped steel has good mechanical properties and strong anti-bend ability. It can save 10% to 15% of metal compared to common I-beams under the same load, and can reduce the structure weight by 30% to 40% on the bridge. Reduce 15% -20%. Compared with hot-rolled H-section steel, the wall is light and thin, with better cross-section characteristics and superior to the traditional steel type. The dimensional accuracy is high and can be customized according to specified requirements; the production specifications are more flexible and complete to meet the needs of users; the delivery cycle is short. Easy installation and construction.
Benefit Analysis:
The use of high-frequency welding light-weight H-beam steel materials to develop light buildings: 1, shorten the construction period 30-50%, can speed up capital turnover, saving interest; 2, increase the indoor use area of ​​more than 5%, reduce space loss, than conventional construction Reduce the overall cost by about 20%; 3, due to the light weight of the structure, the basic cost of the building is greatly reduced; 4, the production and installation are convenient, and the factory production can be realized; 5. The amount of steel saved, compared with the hot-rolled steel, saving The amount of steel is 10-30%, and the social benefits are very significant.
Compared with I-beams, the structural strength is high, and the section modulus is large. When the bearing conditions are the same, 10-15% of the metal can be saved.