On the construction of the diagram of calculation method of rod reinforced concrete structures under the action of low negative temperatures

摘要

As a result of generalization and analysis of the data in the field of experimental studies, the significant influence of low negative temperatures on the development of stresses and strains in reinforced concrete structures from the force effects was justified. It is shown that this influence largely depends on various structural and technological factors: (characteristics of the composition of concrete, its structures, water-cement ratio and of the natural moisture content of concrete). The necessity of taking into account these factors of influence in the calculation of reinforced concrete structures on the strength, deformability and crack resistance at the same time power and temperature effects has been justified. Diagrams of deformation of concrete in the frozen to minus 70 °C condition are developed. Taking into account these diagrams the development of the diagram method is given, which allows to calculate reinforced concrete core structures under simultaneous influence of power loads, and low climatic (to minus 70 °C) negative temperatures.