Constitutive Models for Steel Fibre Reinforced Concrete Members

摘要

The constitutive models for the monotonic compressive and tensile behaviour of SFRC membersrnwere presented in this paper. The developed fibre tension model was expanded to the cyclic tensilernbehaviour of SFRC. The proposed models have been verified through the test results obtained fromrnthe extensive experimental program conducted by the authors’ research group. In addition, with thernconsideration of stress variation of concrete matrix between cracks, which are due to steel fibresrnbridging a crack and the bond mechanism of a conventional rebar, the tension stiffening model andrnthe average crack spacing model have been also developed so that the tensile behaviour of SFRCrnmembers with a conventional rebar (R/SFRC) could be accurately predicted. The proposed modelsrncan easily be implemented in most analysis procedures so that they will be useful in simulating thernstructural behaviour of SFRC or R/SFRC members.