Experimental study on stress performance of oblique section of reclaimed concrete without rib beam

recycled concrete;  beams;  no rib bridge;  Shear bearing capacity

Through the comparative test of 13 recycled concrete beams and ordinary concrete beams, the effects of recycled aggregate substitution rate and shear-span ratio on the oblique section stress performance of recycled concrete beams were discussed. The test results show that the deformation and oblique crack width of the recycled concrete beam are larger than that of ordinary concrete beam. The failure form of recycled concrete beams is related to shear span, λ≤1 oblique compression failure, 1.5≤λ<3 shear failure, λ≥3.0 diagonal failure occurs.With the increase of recycled aggregate replacement rate, the shear bearing capacity of recycled concrete beams has a downward trend. With the increase of shear span ratio, the shear bearing capacity decreases. On the basis of experimental research, according to the limit equilibrium theory, the calculation formula of the shear bearing capacity of recycled concrete beams is proposed.