CHANGE OF THE LOAD-BEARING CAPACITY OF THE STRUCTURES IN TIME IN SEISMIC CONSTRUCTION

In article the analysis of the structures condition working in seismic activity zones is carried out. It is revealed that the degradation processes proceeding in materials of structures and also the seismic mode of the region influence on durability of structures. The intensity of influence depends on density of a total seismic stream in the region. It is proved that in deciding of restoration need and/or structures strengthening it is necessary to apply the differentiated approach: each structure has to be restored or strengthened proceeding from her concrete state, taking into account requirements for safety during the residual term of operation. At mitigation of consequences of an earthquake it is necessary to observe sequence of the buildings and structures demanding restoration, strengthening or demolition. The sequence has to be taking into account terms of maintenance free operation of the structures and risks connected with their operation in the damaged state.