With the continuous improvement of the social economy and the improvement of science and technology, the application of steel structures has become more and more common. The so-called steel structure refers to a building structure consisting mainly of steel products, consisting of steel beams, steel columns, and steel trusses made of steel and steel plates. What do you know about the characteristics of steel structures? Steel structure installation process is what? Let's take a look with Xiaobian.

Steel structure installation

Steel features

The steel structure system has the comprehensive advantages of light weight, industrial manufacturing, quick installation, short construction period, good seismic performance, rapid investment recovery, less environmental pollution, and high degree of industrialization, and has more unique advantages compared with reinforced concrete structures. On a global scale, especially in developed countries and regions, the application of steel structures in various projects is extremely widespread, such as steel bridges, steel plants, steel gates, various large-scale pipeline containers, high-rise buildings, and tower rails.

Steel structure installation process

1. According to the normal installation sequence and process requirements, prefabrication and assembly of steel structures on steel platforms must ensure the quality of welding production.

2. The spacing between the splice flange joints and the web joints of the profiled steel should be greater than 200mm. The splicing length of the flange plate can not be less than 2 times the board width; the splicing width of the web should not be less than 300mm and the length should not be less than 600mm.

3. For welding convenience, ensure the welding quality, as far as possible on the column, the beam on the ribs, connecting plates, plates, pick beams, etc. on the ground steel platform according to the size of the construction drawings welding.

4. Prefabricated steel components on steel platforms should not only be manufactured in accordance with the construction drawings and specifications, but also the changes in the processability and installation dimensions of on-site installation.

Steel structure installation

Steel installation points

1. Friction coefficient: where F is the force for initial slipping of the test piece as measured by the anti-slip test, and nf is the number of friction faces, which is the sum of the measured values ​​of the pretensioning force of the high-strength bolt tightening corresponding to F.

2. Torque factor: d is the nominal diameter of the high-strength bolt (mm), M is the applied torque value (NM), and P is the bolt pre-tightening force. 10.9 high-strength large hexagon bolt connection must ensure that the average torque coefficient K is 0.110 ~ 0.150. The standard deviation should be less than or equal to 0.010.

3, early twisting torque: In order to reduce the impact of the steel plate deformation in the bolt fastening process, can be used to tighten the secondary tightening to reduce the mutual influence between tightening bolts. The high-strength bolts are screwed for the first time, so that the axial force should be 60% to 80% of the standard axial force.

4. Final twisting torque: The final tightening torque of the high-strength bolt is the final twisting torque. Considering the loss of various prestresses, the final twisting torque is generally 5% to 10% greater than the theoretically calculated torque value according to the design pretension.

The above features about the steel structure and the installation process of the steel structure are briefly introduced here. We hope to help you. For more information, please visit this website. Stay tuned.

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