Hainan Steel tells you: What are the advantages of steel construction projects occupy in Civil Engineering

First, the characteristics of the steel construction of civil engineering

(1), intensity: Generally speaking, the role of structural member to withstand or effect is the ability to accommodate the intensity data to the resolution. Can take advantage of relevant national standards to determine the functional structure of steel components, these criteria are listed in steel construction materials that can be used, such as the construction of steel structure to meet the CSA standard ASTM standardA992 / A992M or cAN / CSA G40.20 / C40.21 and other relevant standards requests.

(2), stiffness, vibration and deformation parameters applicability to the resolution by the stiffness of the component, and then by the stiffness of the structural system to decide: actual stiffness structural system and its distribution member and the adapter member to decide. But briefly speaking, rigidity member by the geometric section properties and the elastic modulus material information to the resolution, the elastic modulus of the steel structure is usually 200GPa. The compressive strength of concrete density is usually in the range of 20 ~ 40Gpa its elastic modulus the amount is usually in the range of 20 ~ 28GPa; even for high-strength concrete, its elastic modulus, but also between 40 ~ 45GPa, shows that the steel structure of steel and concrete is about five times ten times, so rigid steel structure has a significant advantage.

(3) Ductility: Ductility refers to a certain kind of materials in the process of drawing the plastic deformation without fracture. Normally ductility is lagging energy of structural design, especially the more major seismic design parameters, construction of earthquake survivors was directly dependent on the main structure frame through large inelastic deformation of. Steel structure can be said to be currently the most widely used, one of the best engineering data toughness.

(4), toughness: A measure of the energy absorbed before fracture data and indicators plastic deformation capacity is toughness. Expanding it to resist unstable crack notch site. The toughness of the steel structure is usually expressed in the manufacturing, installation and use of the process can withstand relatively large industrial deformed steel structure is one of the main features. It is because of the toughness of the steel member before it reduces the possibility of cracks in bending, shearing, punching, forging, drilling and other manufacturing processes. Fracture toughness of the steel structure is necessary to have a meet, especially for alternating loads as well as by the impact load of construction structure is more to have this feature. Hainan Steel

(5) Overall: From the foregoing, either from the stiffness, strength still is in terms of ductility, the steel structure is better than concrete and steel structure can be relatively easy to construct a construction have exotic form, usually steel construction systems to provide the best design flexibility and maximum space utilization. Another strong point is the steel structure: it is still an ideal cantilever construction system. The appropriate use of fasting as well as member web steel bracket holes, to provide passage for the pipeline and other supply lines, only reducing the height of the floor, and increased aesthetic appeal.

Second, the steel structure construction means Highlights

The whole construction process of the steel structure is more complex, and the construction of different requests on the details there are big differences. Listed here are three points briefly described.

(1), the selection and Cohesion: steel is usually divided into plates, profiles, fabricated metal products and pipe four categories. Civil engineering construction of the steel usually used the usual low-alloy steel, high carbon steel structure and generally carbon steel, carbon steel, plastic is relatively low, but the intensity is relatively high hardness. In steel construction, the column cross-section is usually more for the box-shaped cross section or wide flange "workers" shape, in addition to "ten" shaped cross-section and so on; beam welding or the majority is rolling "H" section steel beam, if requested it is possible to fit a special section in front of the main means of welded joints to do test welding technology, set welding material and the lattice parameters. Between the beam and the beam convergence between beams and columns, it is possible to take high-strength bolts or welding convergence of convergence, pay attention to the accuracy of the convergence of high-strength bolts holes.

(2), stacking steel components and selection means mechanical Location: Under normal circumstances the device configuration of the land area should be 1.5 times the area of ​​construction. In accordance with the order means the water from the yard supporting transit transport to the site of the steel members to choose handling machinery to mechanically disposed within the radius of gyration. If because of transport caused by deformation member at the construction site should be corrected. Devices are typically constructed of steel is chosen tower cranes, boom length have enough coverage, and lifting capacity to meet the appropriate and meet a variety of requests for different lifting Gao bit member. Rope capacity but also to meet the requests of lifting height; the lifting speed grades to meet the means to meet the request.

(3), paint technical processes: primary treatment. First, clean the surface of the metal, and then do rust. Processing technology first brush with a wire brush repeatedly beat, then fine emery cloth polished so that the surface bright, smooth, and then use cotton or gauze to polish the rust powder and floating ash clean under. If severe surface corrosion, use a wire brush and shovel handle, large areas of corrosion is able to cope with a grinder to clean up. After drying putty to polished smooth and clean. If stacked too long, we have to do it again brushing. Hainan Steel

Phosphate primer coating. Phosphate primer coat and phosphate solution includes two parts. Brush finish. When brushing paint brush to many reasons, the oil flow does not fall either, full uniform, bright color consistency.

Third, the main use of steel construction elements

(1), box-type concrete pillars: box-concrete columns inside the box in the middle column joined the bulkhead play a supporting role, filling high-intensity (C50) in the box column grade concrete, so the information on the formation of two Mechanism work together mutually assistant, and then eradicated under load role in its strength has not yet reached its limit when first produced a relatively large deformation this situation. Its strengths are the following three points: the construction of simple and convenient operation. Outstanding seismic features. Strong bearing capacity. Construction beams are used in factories after processing, transportation to the site before loading, so, not only saves the workload of the construction site, but also greatly reduce the construction period.

(2), the lateral force resisting concrete simple support structure: elevators, stairs reinforced concrete core wall formed at a position, as a shear force resistance to lateral support and improve the structural stability, optimizing lateral stiffness, improve seismic features play an active effect.

(3), in-situ reinforced concrete floor: the use of steel frame as a support beam under the wing edge template material support, capped bamboo, then design the laying of reinforced concrete pouring C30. Save the template material and shorten the construction period.

(4), energy saving composite wall panels: In a certain sense, especially siding panels more important than the structural system. Since the main function of home construction is achieved by wall panels. Prefabricated wallboard factory production, on-site equipment, basically canceled the wet work.

(5) Energy efficient heating methods senior residence steel structural system: energy home energy consumption can be reduced not only help protect the environment, but also to make life greatly reduced cost of ownership. According to the survey, people's awareness of energy-efficient homes is deepening, and there is more than seventy percent of people expressed their willingness to buy energy-saving homes. Based on this, this project is also fully expect the use of energy-saving technologies.

(6), the main steel structure lifting the basement garage of the use of research based on the characteristics of the following two aspects, to lift part of the three-dimensional garage equipment: ① basement floor of this project is relatively high. ② urban development needs in terms of the number of parking spaces. Three-dimensional multi-level parking facilities can be said to be a new type of equipment, it is excellent because it can save space, less investment, flexible layout and automated layout mode. Hainan Steel

IV Conclusion

In summary, the steel structure by virtue of its own hard, high endurance advantage gained widespread use in civil engineering, and won the user's sure, but also makes use of these tectonic models built from single to cross, diversified , from the characteristics of the development point of view, which has a broad space for development.