BEARING CAPACITY OF COMPRESSED PILLARS

Abstract

The main goal of the research is to develop a calculation model for determining the residual bearing capacity of compressed stone elements of damaged cross-section. In the laboratory, 15 prototypes with pre-modeled damage were manufactured and tested. From the selected variation, factors most affect the carrying capacity proved parameters characterizing element damage eccentricity affects secondary. According to the estimates of the experimental statistical model and single-factor local fields, the depth of damage in the cross section of the column has the greatest impact on the bearing capacity. A calculation model was created to determine the residual bearing capacity of damaged structures of rectangular cross section and the height of the compressed zone (x) and the area of the compressed zone (A_c). At its core, the model is based on the basic assumptions of existing building codes. The article presents two generalized types of damages according to the type of shape: direct damage - when the inclination angle of the damage front is zero and oblique damage - when the inclination angle of the damage front is not zero.

Compound equilibrium equations by a joint solution allow to obtain the residual bearing capacity of damaged stone structures. On the basis of the obtained results it is possible to establish the actual technical condition of structures and the possibility of their further operation by calculation or to establish the need for reinforcement.