Application of shell and solid elements in the analysis of building steel designs with software SCAD and Nastran accounting for geometrical and physical nonlinearity

Structural mechanics

Computational models using shell finite elements have a number of advantages in comparison with beam models, and their application can sometimes give essential improvements in design optimization, in the speed, presentation and simplicity of obtaining results using modern software. 

The following calculations were done in the paper:

  • durability of ribs of I-section components in assumption of elastic behavior of the material;
  • bearing ability of beams and frames based on welded double tees of variable cross-section in the supercritical area of rib behavior.

In manufacture of steel constructions with flanged joints with high-strength prestressed bolts, there often appear mushroom-shaped residual deformations in flanges. The calculation method with the use of solid element models introduced in the paper allows to justify doing without laborious and costly milling of the flanges.