Influence of the gripping fixture on the modified compact tension test results: evaluation of the experiments on cylindrical concrete speciments

摘要

The modified compact tension test (MCT) might become in the future a stable testconfiguration for the evaluation of fracture-mechanics parameters or also for description of fatiguebehavior of composites materials such as concrete. Core drilling is used for sampling of existingstructures. These samples have cylindrical shape with the selected thickness to avoid the stressconcentration. This contribution focuses on the evaluation of the fracture behavior during static andquasi static tests. Static tests are performed on standard specimen with diameter 150 mm and length300 mm. The quasi-static tests are performed using two different gripping fixtures. The results forquasi-static tests are represented as L-COD diagrams (i.e. load vs. crack opening displacement)measured on the loading axis. The comparison of results and discussion of advantages anddisadvantages are introduced.