Despite the great influence of corrosion on the strength of structures, this issue is the most forgotten. This situation is a direct consequence of the fact that this issue goes beyond the study of strength from the standpoint of construction mechanics and goes into the area of construction physics and chemistry, not affected by engineering research in this part.
The absence of standards does not allow this issue from generally accepted estimated positions. However, this does not reduce interest in it both from the theoretical side directly related to the problems of the durability and capital of the structure, which should be the basis of our further, more in -depth approach to structures, and from the practical side due to exclusively large losses caused by corrosion. Therefore, the creation of a corrosion -resistant constructive form is the first task.
The work of steel under load mainly depends on the following factors:
1) the type of power exposure;
2) the forms of an element subjected to power exposure;
3) steel structures;
4) the chemical composition of steel;
5) the influence of temperature effects;
6) the influence of their own stresses.
1. The influence of differences in strength influences
Power influences can be distinguished by the type of stress state that they cause. Below are the main types of strength influences.
Power influences that cause a single -axle stress state, namely, central stretching or compression, clean bend, worshiper stretching or compression of the maologian elements with the equal in length of the element of eccentricities and others. The work of steel with these power influences is most well studied and expressed by a well -known diagram of stretching or compression, in which the features of the work of steel are most clearly revealed.
