What are the material requirements of the spherical space frame structure?

For the space frame steel structure processing has strict requirements on the static and dynamic properties of steel, such as elasticity, plasticity, strength, toughness, and scrap mechanical properties. The mechanical properties of steel are the main basis for structural design. Secondly, introduce the damage form of steel and the main factors affecting the performance of steel, as well as the classification, selection principles and specifications of steel. To understand the characteristics of steel structures in depth, it is necessary to start with the material of the frame steel structure and master the working performance of the steel under various stress states, different production processes and different use conditions, so as to be able to select the appropriate steel, not only to make the structure safe and reliable, and to meet the requirements of use, it is possible to save steel and reduce the cost.

There are many steel requirements in steel structure engineering, mainly in the following aspects:

(1) Have higher strength. The tensile strength and yield point of steel are required to be relatively high. A high yield point can reduce the cross-section of the component, thereby reducing weight, saving steel and reducing cost. The high tensile strength can increase the safety reserve of the structure.

(2) Good plasticity. The plasticity is good, it can make the structure have obvious deformation before breaking, and can avoid the brittle failure of the structure. Good plasticity can adjust the local peak stress, redistribute the stress, and improve the ductility of the member, thereby improving the seismic capacity of the structure.

(3) Good impact toughness. Good impact toughness can improve the ability of the structure to resist dynamic loads and avoid cracks and brittle fractures.

(4) Good cold working performance. Steels are often processed at room temperature. Good cold working performance can ensure that no cracks or brittle fractures occur during steel processing, and processing does not have a greater impact on strength, plasticity and toughness.



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