What issues should be considered when planning a steel structure in Dongguan?
Following the development of the shopping mall, the steel structure has been used to a large extent. Let's take a look at the issues that should be considered in the planning of Dongguan steel structure factory.
Modern factories are all steel structure factories. Because of their fast construction speed, light weight, good seismic performance, and environmental protection, they have been widely recognized in construction projects, and gradually replaced crude concrete in industrial plant planning. The structure has been used throughout, and the article discusses the corresponding problems in the planning and construction of Dongguan steel structure plant.
The superiority of Dongguan steel structure workshop is summarized in the main interests of steel structure workshop: First, in terms of construction speed: high-rise steel structural members can be mass-produced in factories, construction is simple, equipment is convenient, and the construction period is greatly shortened. Secondly, Dongguan steel structure In terms of self-weight, the plant can reduce the structural quality of the building by about 30%, especially in areas with low foundation bearing capacity and high seismic fortification intensity. Its general economy is better than reinforced concrete structural system; after all, from the perspective of environmental protection: steel structure system Due to the environmentally friendly green construction system, the steel itself is a high-strength and high-performance material with high recycling value and no need for mold construction.
The importance of drawing planning for Dongguan steel structure factory: No matter what kind of project, the drawing is the basis of engineering construction. During the planning period of the steel structure workshop, the professional technicians of the construction unit shall be arranged to review the drawings, check the “mistakes, leaks, bumps and shortages” in the construction drawings, and strive to deal with the problems before the construction, and reduce the quality of the works due to the drawings. And the impact of the development. The steel structure engineering plan should plan the construction schedule for the manufacturing stage and the equipment stage. The manufacturing process content of the steel structure should include the quality standards and skill requirements of each process and each sub-item in the manufacturing stage, and the various items formulated to ensure product quality. specific measure.
Planning guidelines for the support system of the Guangang structural plant: In order to ensure the space operation of the steel structure workshop, the overall stiffness is traveled, the longitudinal horizontal force is withstood and transmitted, the excessive deformation of the rod is prevented, the pressure bar is prevented from being unstable, and the structure is ensured. The overall stability should be based on the structure of the plant structure, the setting of the workshop crane, the oscillating equipment and the span of the plant, the height, the length of the temperature section, etc., and arrange a solid support system. A stable inter-column support system shall be provided for each temperature section of the plant and shall be in harmony with the horizontal horizontal support arrangement of the roof. The orientation of the support of the lower column is an important factor in the direction of deformation of the longitudinal structure of the plant, and affects the temperature stress. The support of the lower column should be located in the middle of the temperature section as much as possible, so that the longitudinal members such as the crane beam can be freely changed with the temperature. Elastic to both ends of the section. When the length of the temperature section is not large, generally a lower section column support is provided in the middle of the temperature section, but when the length of the temperature section is greater than 150 meters, in order to ensure the longitudinal rigidity of the plant, two sections should be set in the temperature section. The lower column supports, the orientation should be arranged as much as possible within one third of the center of the temperature section. In order to prevent excessive temperature stress, the center distance of the two supports should not exceed 72 meters.
Key points for seismic planning of steel structure buildings in Dongguan: In the earthquake-resistant planning of Dongguan steel structure engineering, we should pay attention to: Firstly, in terms of overall arrangement, the quality and rigidity of the plant structure are required to be evenly distributed, so that the plant is evenly stressed and harmonically deformed. Try to prevent the structural rigidity from being uneven due to the structural rigidity. The horizontal structure of the plant should use the rigid frame or the structure that the truss and the column must be consolidated, so as to fully utilize the force function of the steel structure and reduce the lateral structural deformation. Secondly, the steel The general condition of the damage of the structural plant is not due to the lack of strength of the rod, but often due to the instability of the rod. Therefore, it is especially important for the steel structure factory to arrange the support system reasonably and ensure the stability of the whole structure of the plant; after all, under the earthquake effect, there is With low-week fatigue, the planning should pay attention to its impact on the plant. The planning of structural joints should ensure that the damage of the joints does not precede the full-section yielding of the structural members. The structural members should be able to enter the plastic operation and fully absorb the seismic energy to exert its seismic resistance.
The importance of the heat-resistant talent planning of Dongguan steel structure factory: In the first and last section, we mentioned that the fire-fighting talent of steel structure workshop is very poor. When the steel is heated above 100 °C, the tensile strength of the steel increases with the temperature. When the temperature is about 250 °C, the tensile strength of the steel slightly advances, but the plasticity decreases, and the blue brittle phenomenon occurs; when the temperature exceeds 250 °C, the steel becomes creeping; when the temperature reaches 500 °C, The strength of the steel drops to a very low level, causing the steel structure to collapse. Therefore, when the surface temperature of the steel structure is above 150 °C, it is necessary to do thermal insulation and fire prevention planning (usually by applying heat-resistant paint). In the construction of steel structure factory, the problems are very cumbersome. Here we only analyze the more prominent problems.
Analysis of the problem of embedding the anchor bolts during the construction process: It can be said that the consolidation of the anchor bolts is the root address of the stability of the steel structure building. The accuracy of the anchor bolts is related to the positioning of the steel structure, and the anchor bolts must be buried. Strictly ensure its accuracy, embedding accuracy of anchor bolts: axis displacement: ± 2.0mm, elevation: ± 5.0mm. Before the column anchor bolt device, each axis of the plane control net is cast onto the base surface of the column, all closed to ensure the accuracy of the bolt equipment, and then the outer edge of the column is released according to the axis, and the anchor bolt of the equipment steel column is to be After the shelf is set up, the required elevation is copied to the steel pipe rack. After the shelf of the platform is set up, the required elevation is copied to the steel pipe rack.
The above content is to pay attention to the planning of Dongguan steel structure plant.
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