Petrov A. Stress-strained state of bar columns under axial and eccentric compression

Object - bar columns; aim - the methodology elaboration of strained-stress state of shot and long bar columns under the axial and eccentric compression; the methods - analytical, numerical, experimental, step iteration; novelty - the methodology of strained-stress state evaluation of bar columns taking into account concretes' three-dimensional stress state and crack formation; the theoretical and experimental results of bar columns' deformation under the axial and eccentric compression were obtained; the influence of buckles' step at columns strained-stress state were researched together with its optimal value; the numerical analysis of bar columns geometry influence on concrete core state were provided; results - utilizing of bar columns helps to decrease the concrete up to 30% and steel - up to 20%; application - design, reconstruction, strengthening.