The structural joint in civil engineering

The Joint in civil engineering represents the interruption of the continuity of a work, avoiding damage caused by earthquakes (or else two zones adjacent to a structure, avoids temperature variations caused by states of constraint, or those external causes, different loads in structures capable of inducing the onset of internal forces, withdrawal, constraint settlements, temperature variations, and prestressing tendons

Then the civil joint allows the structure to remain unharmed by earthquake. It can be  realized in various types depending on the type of structure, aesthetic requirements, plant engineering and structural (for example: Neoprene). The latter gives an elasticity to the joint amortizing the stresses peack in an effective manner.