Features of the Calculation of Composite Beams with Constrained Torsion and the Presence of Corrosion Damage

In the process of operation in the construction metal structures are subject to intensive physical wear, manifested in the form of mechanical, corrosion damage, the formation and development of deformation damage in the form of cracks. The essential influence of the constructive form on structure durability is obvious from the analysis of steel structures corrosion damages. Studies of the influence of various elements, assemblies and conjugations of structures can prevent the corrosion damage in the design process. Knowing the quantitative indicators and regularities of this influence on the value of corrosion resistance of the structure as a whole, one can already pre-determine and choose possible constructive form which would least contribute to the emergence and development of factors increasing the intensity of corrosion damage. Usually, the influence of several factors is summed up at the same surface area and causes particularly accelerated destruction.