Calculation for the progressive collapse of the steel frame based on the shutdown of an element of the structural scheme

Reliability of a building object - the ability of a building object perform the required functions during the estimated service life. In this case, the structure may experience a special limit state after exceeding the limit of the bearing capacity in the first and deformability in the second limit states, in which they do not fully comply with the functional requirements; further increase in loads and impacts leads to their destruction. The assumed initial local destruction implies the removal of a bearing structural element, simulating the loss of bearing capacity and stability, as well as leading to a change in the structural design of the structure. As a result of the damage received, a progressive avalanche collapse can occur in the form of the destruction of load-bearing building structures, leading to the collapse of the entire building or structure or its parts due to the initial local destruction.