METHOD OF STRENGTH TESTS OF NATURAL STRUCTURES Russian patent published in 2020 - IPC G01M7/06 

FIELD: test technology.

SUBSTANCE: invention relates to equipment for strength tests of natural structures, in particular to methods of two known types of tests, one of which is testing for static strength, and another fatigue test, which are carried out on two identical full-size structures. In the process of implementation of the proposed method, two types of tests are combined on the same natural structure and additional tests for static strength of samples of critical zones of natural structure which are critical under static strength conditions are carried out. For this, at the first stage, the most loaded part of the natural structure is stepped loaded to the operating load, and the rest of the structure is loaded with a load not exceeding the load variables of the fatigue tests, structure tensometry is carried out, based on the results of which the finite element (FE) model of the structure is verified. FE-based model is calculated for design loading case. Performing static tests of samples of natural structure zones, which are critical under conditions of static strength. Static strength of the structure is predicted by comparing active stresses obtained by finite-element calculation for design loads with destructive stresses obtained as a result of specimen testing. At the second stage, the same full-scale structure used for static tests is loaded with cycles of variable loads in an amount sufficient to confirm the design service life of the structure.

EFFECT: technical result consists in reduction of technical means for creation of facilities required for testing, and facilities for making two full-size structures, as well as reducing duration of preparation and testing.

3 cl, 7 dwg