Prediction of shear capacity of SRC beam and numerical study of continuous beam based on ABAQUS
In order to achieve an accurate prediction of shear capacity of steel reinforced concrete(SRC)beams and deeply understand the shear behavior of SRC continuous members,a numerical model suitable for shear analysis was firstly established with ABAQUS,which considered the concrete-confined effect by stirrups and steel.The rationality of the model was validated using the data from fifty-seven SRC shear beams.To explore the application scope of the model,the influences of design parameters,such as concrete strength grade,steel shape ratio,stirrup ratio,etc.,were studied in further.Then,the effects of two parameters,including dilation angle and viscosity coefficient,in the CDP model were also researched.It is found that the influences of dilation angle and viscosity coefficient are more sensitive to the specimens with lower shear-span ratios.It is suggested that the viscosity coefficient is taken as 0.0001～0.0005 and the dilation angle is taken as 35°～40° for non-strong-confined zone and 56° for strong-confined zone.Finally,the shear mechanism of SRC continuous beams and the influence of shear-span ratio on the shear capacity were studied with the established model.
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