Problems needing attention in building steel structure workshop
Firstly, the advantages of steel structure industrial workshop are summarized.
First of all, in terms of construction speed, steel structure members can be mass-produced in factories, with simple construction and quick installation, which greatly shortens the construction period; Secondly, in terms of self-weight, steel industrial workshops can reduce the structural quality of buildings by about 30%, especially in places with low foundation bearing capacity and high seismic fortification intensity, and their comprehensive economy is better than that of reinforced concrete structural systems; Finally, from the perspective of environmental protection, the steel structure system belongs to the environment-friendly green building system, and the steel itself is a kind of high-strength and efficient material with high recycling value, and no mold construction is needed.
Second, the importance of steel structure industrial workshop drawing design
No matter what kind of project, drawings are the basis of project construction. In the design process of steel structure industrial workshop, the professional and technical personnel of the construction unit should be organized to jointly review the drawings and check the "mistakes, leaks, bumps and defects" in the construction drawings, so as to solve the problems before construction and reduce the influence of the drawings on the project quality and progress. Construction organization design should be made in the production stage and installation stage of steel structure engineering, and the production process content of steel structure should include the quality standards and technical requirements of each process and sub-item in the production stage, as well as specific measures to ensure product quality.
Third, the design principle of steel structure industrial workshop support system
In order to ensure the spatial work of steel structure workshop, improve its overall stiffness, bear and transmit longitudinal horizontal force, prevent excessive deformation of bars, avoid the instability of compression bars, and ensure the overall stability of the structure, a reliable support system should be arranged according to the structural form of the workshop, the installation of crane in the workshop, vibration equipment, span and height of the workshop, and the length of temperature section. A stable inter-column support system should be set up in each temperature section of the workshop, and it should be coordinated with the arrangement of horizontal supports on the roof. The position of the lower column support is an important factor that determines the deformation direction of the longitudinal structure of the factory building and affects the temperature stress. The lower column support should be located in the middle of the temperature section as far as possible, so that the longitudinal members such as crane beam can freely expand and contract to both ends of the section with the temperature change. When the length of the temperature section is not large, a lower column support is generally set in the middle of the temperature section. However, when the length of the temperature section is greater than 150m, two lower column supports should be set in the temperature section to ensure the longitudinal stiffness of the factory building, and their positions should be arranged within one third of the middle of the temperature section as far as possible. In order to avoid excessive temperature stress, the center distance between the two supports should not be greater than 72m.
Four, the key points of seismic design of steel structure industrial workshop.
Attention should be paid to the seismic design of steel structure industrial workshop: firstly, in the general layout, the mass and stiffness of the workshop structure should be evenly distributed, so that the stress of the workshop is uniform and the deformation is coordinated, and the adverse impact on seismic performance due to uneven structural stiffness should be avoided as far as possible. The transverse structure of the factory building should adopt a rigid frame or a frame with a certain consolidation between the roof truss and the column, so as to make full use of the mechanical performance of the steel structure and reduce the deformation of the transverse structure; Secondly, the damage of steel structure workshop is usually not caused by the insufficient strength of components, but by the instability of components, so it is particularly important to arrange the support system reasonably to ensure the overall stability of the workshop structure. Finally, under the action of earthquake, there is low cycle fatigue, and attention should be paid to its influence on the factory building when designing. The design of structural connection points should ensure that the failure of nodes does not yield before the full section of structural members, and structural members can enter plastic work, fully absorb seismic energy and exert their seismic capacity.
Verb (abbreviation of verb) Importance of heat-resistant design of steel structure industrial workshop
The fire prevention ability of steel structure industrial workshop is very poor. When the steel is heated above 100℃, the tensile strength of the steel decreases and the plasticity increases with the increase of temperature. When the temperature is about 250℃, the tensile strength of steel increases slightly, but the plasticity decreases, resulting in blue brittleness. When the temperature exceeds 250℃, the steel inclines. When the temperature reaches 500℃, the strength of steel decreases to such a low level that the steel structure collapses. Therefore, when the surface temperature of steel structure is above 150℃, thermal insulation and fire prevention design must be done (usually by painting heat resistant coatings). However, in the construction of steel structure industrial workshop, the existing problems are very complicated, and only a few outstanding problems are analyzed and studied here.
Analysis on the Embedding of Anchor Bolt in the Construction Process with Intransitive Verbs
It can be said that the firmness of anchor bolts is the foundation of the stability of steel structure industrial workshops. The accuracy of anchor bolt is related to the positioning of steel structure, and its embedding accuracy must be strictly guaranteed. The embedding accuracy of the anchor bolt is: axis displacement: 2.0mm, elevation: 5.0 mm. Before the installation of the column anchor bolt, all axes of the plane control network should be measured on the surface of the column foundation and closed to ensure the installation accuracy of the bolt, and then the outer contour line of the column should be set out according to the axes. After the installation of the bearing platform frame with steel column anchor bolts is completed, copy the required elevation to the steel pipe frame. The above are some design analysis and introduction of steel structure workshop. I hope that after reading it, it can also be well applied to the construction of steel structure factory buildings and bring help.
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