Overall action effect analysis shall be conducted for cable tray; At the same time, in-depth analysis shall be carried out for special parts of cable tray under stress.
When there are various stress conditions of cable tray during construction and use, structural analysis shall be carried out for various working conditions respectively, and design analysis shall be carried out according to the most unfavorable conditions. When the outdoor cable tray may encounter accidental effects such as hurricane and snow load, the structural analysis shall be carried out in accordance with the requirements of relevant current national standards.
The model of structural analysis shall comply with the following provisions
The calculation diagram, geometric dimensions, calculation parameters, boundary conditions, meshing, structural material performance indicators and structural measures adopted in the structural analysis shall comply with the actual situation of the product
The action on the structure shall conform to the actual working conditions
Various approximate assumptions and simplifications shall have theoretical and experimental basis or verified by engineering practice; The accuracy of calculation results shall meet the requirements of engineering design.
The structural analysis shall comply with the following provisions
Meet the mechanical equilibrium conditions
Elastic analysis method shall be adopted for structural analysis.
The calculation software used for structural analysis shall be assessed and verified, and its technical conditions shall meet the requirements of relevant current national standards. At the same time, the analysis results are judged and checked to ensure the rationality of the analysis results.
The model structure should be analyzed as a whole according to the spatial system. The spatial structure with simple shape, regular shape and clear force transmission can be decomposed into plane structures along different directions for analysis.
The tray and ladder shall be analyzed as a whole by using the spatial system and shall meet the following calculation requirements
The pallet calculation model unit adopts plate element
When the side of the ladder is plate, the plate element is adopted. When the side of the ladder is section steel, the beam or solid element is adopted
The mesh size of the plate element of the calculation model should not be greater than 10mm.
The strength, stability and slenderness ratio calculation of cable tray structural members shall meet the relevant provisions of the current national standard design standard for steel structures (GB50017) and technical code for cold-formed thin-walled steel structures (gb50018); The strength calculation of structural members of stainless steel cable tray shall comply with the relevant provisions of the current association standard technical specification for stainless steel structure cecs410.