Estimation of operated ferro-concrete structures strength of usual and prestressed reinforcing under longitudinal forces, bending and twisting moments

Results of the theoretical research to perfect methods of strength and crack durability of the operated building's ferro-concrete structures and construction estimation under static and short-term dynamic loadings of emergency nature are considered. The calculation methods of ferro-concrete structures in complex intense conditions take into account basic physical laws of dynamic deformation of ferro-concrete at all stages of structure work. The common conditions of ferro-concrete element's relative strength and crack durability are formulated.