Safety and Stability of Structures with Semi-Rigid Connections of Members in Nodes

Abstract

The structural design of a system in which connections of members are absolutely rigid or perfectly pinned has been thoroughly worked out in the existing literature. In real structures in general, and particularly in the precast ones, connection in joints may be partially rigid, which can have a significant impact on the change of stresses and strains in the structure, i.e. on the stability and security of the structure.Testing of engineering structures, i.e. conditions that must be met so that they remain in stable equilibrium position is of special importance. To determine the limit state of stability in use are experimental and analytical methods based on static, dynamic and energetic principles.This article presents the methods used to ensure technical safety and security, as well as additional safety conditioned by public and social reasons. The functional damage and fatigue are discussed, as well as the concept of the projected lifespan of the structure. Increased strength provides a higher degree of security, although many factors are variable.