Testing device for axial tension of test pieces with different thicknesses

The invention relates to a test device for axial tension of test pieces with different thicknesses, which comprises an upper clamping mechanism, a steel fiber reinforced concrete test body and a lower clamping mechanism, the upper clamping mechanism comprises an upper connecting rod and an upper connector; the lower clamping mechanism comprises a lower connecting rod and a lower connector, universal joints are arranged in the upper clamping mechanism and the lower clamping mechanism, the steel fiber concrete test body comprises a test piece and clamping plates, the two ends of the side face of the test piece are bonded with the clamping plates, and the clamping plates at the two ends of the test piece are connected to the upper connector and the lower connector through fixing bolts. The problems that the end of an existing test piece axial tensile test device is prone to being snapped and the thicknesses of test pieces are different can be solved, and the test failure probability that non-test areas of the te