TESTING AND NUMERICAL SIMULATION OF THE NORMAL CROSS SECTION BEARING CAPACITY OF STEEL REINFORCED RECYCLED CONCRETE COLUMNS
In order to study the normal cross section bearing capacity of steel reinforced recycled concrete columns, 7 specimens were tested under low cyclic reversed loading. The mechanical processes and failure modes were observed, and the bearing capacity of normal cross section and bending moment drift angle hysteretic loops were obtained. The influences of the recycled coarse aggregate replacement ratio, axial compression ratio, and stirrup ratio on the normal cross section bearing capacity were analyzed. Based on the experimental study, an analysis program for normal cross section bearing capacity was compiled by using a numerical integration method, through which the N M interaction curve and ultimate strength of steel reinforced recycled concrete columns can be calculated. The theoretical results and experimental results show good agreement. Furthermore, with the program, parametric analysis on N M interaction curves were carried out, and the laws governing the influence of concrete strength grade, steel strength, steel ratio, and loading angle were obtained.