Verification of steel-to-concrete anchorage system reliability based on failure probability evaluation using test results

摘要

The paper deals with the problems of load-carrying capacity of the particular type of anchorage systems and the topic discussed in the paper is oriented to the post-installed steel anchors to concrete. Some information about the statistic and probabilistic evaluation of the test results for expansion anchors subjected to tensile force and shear force are presented in the paper. Within the framework of the large experimental research programme realized in authors' workplace in the last period, steel expansion anchors to concrete under tensile and shear loading have been tested. A large number of the experimental results - the values of load-carrying capacities namely - has been obtained from these loading tests. Then these test data have been evaluated by the methods of the design based on test results. Using the procedure for the evaluation of the design resistance, characteristic and design values of the resistance have been calculated for particular loading types (tension, shear). For these calculations, the necessary statistical uncertainties influencing the resistance uncertainty (variability of material and geometrical properties mainly) have been taken into account.