Concrete Behavior Under Dynamic Loads in Bridge Structures

An analysis of the results of scientific research on dynamic loads, their characteristics and their impact on the structures of buildings and bridge structures is presented. Theoretically and experimentally confirmed dependences for determination of strength and deformation characteristics of high-strength concretes under dynamic influences are proposed. That allows to determine the characteristics of high-strength concrete under different types of stress-strain state. The possibility of determining the deformation characteristics of concretes depending on the compressive strength and the coefficient of dynamic strengthening is proved, which allows to simplify engineering calculations for dynamic loads. The obtained dependences are confirmed experimentally. Resistance of concrete to dynamic effects is characterized by the concept of explosion resistance. Concrete breakdown or penetration on impact is characterized by the coefficient of susceptibility to penetration. This coefficient also depends on many material parameters: hardness, strength, deformability and density. The possibility of obtaining reliable data on a simple coprop equipment in the laboratory is substantiated.