Design principles of large span steel space frame structure

large span space frame structure

First, the design of long-span steel structure should be combined with the plane shape, size, span, supporting condition, load size and building function of the project to make a comprehensive analysis and determination. The structure layout and supporting form should ensure that the structure has reasonable transmission way and overall stability. The plane structure should be set up support system outside the plane .

Second, the horizontal and vertical seismic effects should be considered according to the seismic code for the large-span steel structures in seismic zones. For long-span steel structure floor, the corresponding comfort requirements should be met according to the using function.

Thirdly, according to the structure and node form, component type and load characteristics of long-span steel structure, and considering the interaction between the upper long-span steel structure and the lower supporting structure, should be established a reasonable calculation model for collaborative analysis.

Fourth, long-span steel structures should meet the all requirements of bearing capacity and stiffness under various load conditions. The prestressed long-span steel structure should be analyzed to determine the prestress distribution of cable or tie rod, and ensure that the cable force is greater than zero under various working conditions.

Fifthly, it is necessary to analyze the construction process for complex long-span steel structures or complex prestressed long-span steel structures.

Sixth, the minimum size section size of the rod should be calculated according to the importance of the structure, span and mesh size, ordinary section steel should not be less than 150×3, steel pipe should not be less than 48×3. For large and medium span structures, the steel tube shall not be less than 60×3.5.

Seventh, the support and joint forms of long-span steel structures should be consistent with the calculation model.

Eighth, the nonlinear stability analysis should be carried out for the arch structure, the single-layer space frame and the double-layer space frame with large span. The design principles of long-span steel structures fully meet the needs of large building structures, providing a solid steel structure scheme for large buildings.More:www.cnxzlf.com