Numerical analysis of the stability of a multi-element rod structure under disproportionate loading

We study the stress-strain state and the process of stability loss for a multi-element rod structure supported by pillars, whose subsidence is prescribed. A numerical model is developed to reveal structure elements with lost stability. The calculated results corresponding to the stability loss process are compared with the data on stability loss obtained by engineering methods. Critical impacts that cause complete and local stability loss in the structure are determined.