On the influence of the location of the elastic bimoment stiffeners on the elastic critical resistance of a simple beam grillage

The aim of the study was to evaluate the impact of the location of the elastic bimoment stiffeners along the length of the main beam B-E of a simple H-type beam grillage on its elastic critical resistance (ECR) from the lateral-torsional buckling condition. The obtained ECR was compared with the critical resistance determined for the grillage without bimoment stiffeners. The greatest efficiency in increasing the ECR of the grillage (around +80%) was achieved by using elastic bimoment stiffeners shifted relative to joints B and E by approximately 21–25% of the main beam span.