To investigate whether the indirect steel bar is capable of yielding when the concrete reaches local bearing capacity

the calculation method of tensile stress when the indirect steel bar could not yield

and the possibility of reasonable anchoring of meshed indirect steel bar outside the wedge

18 specimens reinforced with spiral indirect steel bars and 18 with meshed indirect steel bars were experimentally evaluated

subjected to local compression forces. Results show that when the concrete reached the ultimate load

non-yielding occurred in the indirect steel bars in the area affected by the local pressure. Based on the test results

the volumetric ratios of indirect steel bars corresponding to the yielding of the spiral and meshed indirect steel bars for hot-rolled steel bars with different strength grades (HPB300

HRB400

HRB500

HRB600) were obtained. A calculation method of the tensile stress at the intersection of the meshed indirect steel bar and the outer side of the wedge was established for the situation that the meshed indirect steel bar does not yield under local pressure.