1988 | By J. B. Mander,1 M. J. N. Priestley,2 and R. Park,3 Fellow, ASCE
The paper presents a theoretical stress-strain model for confined concrete subjected to uniaxial compressive loading and transverse reinforcement. The model accounts for various types of confinement, including spiral or circular hoops and rectangular hoops with or without supplementary cross ties, and allows for cyclic loading and strain rate effects. The effective lateral confining stress is defined to account for the configuration of transverse and longitudinal reinforcement. An energy balance approach is used to predict the longitudinal compressive strain in the concrete corresponding to the first fracture of the transverse reinforcement. The model is validated through experimental tests and is shown to provide accurate predictions of the stress-strain behavior of confined concrete under different loading conditions. The conclusions highlight the importance of considering the effective confining stresses and the influence of reinforcement configuration on the strength and ductility of reinforced concrete members.The paper presents a theoretical stress-strain model for confined concrete subjected to uniaxial compressive loading and transverse reinforcement. The model accounts for various types of confinement, including spiral or circular hoops and rectangular hoops with or without supplementary cross ties, and allows for cyclic loading and strain rate effects. The effective lateral confining stress is defined to account for the configuration of transverse and longitudinal reinforcement. An energy balance approach is used to predict the longitudinal compressive strain in the concrete corresponding to the first fracture of the transverse reinforcement. The model is validated through experimental tests and is shown to provide accurate predictions of the stress-strain behavior of confined concrete under different loading conditions. The conclusions highlight the importance of considering the effective confining stresses and the influence of reinforcement configuration on the strength and ductility of reinforced concrete members.