Overall, a good match is obtained between numerical and experimental results in terms of crack width, rebar strain distribution along the splices and ultimate displacement.Įxperimental tests on reinforced concrete (RC) walls have shown that the presence of lap splices may lead to a significant reduction of the member strength and ductility capacity (Almeida et al. Validation is carried out against a series of uniaxial cyclic tests on RC wall boundary elements featuring both continuous and spliced reinforcement different lap splice lengths and confining reinforcement are considered. For spliced members, the ultimate displacement is computed through a semi-empirical relationship providing the average lap splice strain at failure. For an imposed global displacement, the model provides the steel and concrete stress and strain distributions, the crack distribution and opening, as well as the global resisting axial force. Namely: (i) an anchorage-slip element accounting for the strain penetration of the longitudinal reinforcement into the foundation (ii) a basic tension chord element evaluating the response outside the lap splice zone and (iii) a lap splice element describing the behaviour within the lap splice region. The model is composed of an assembly of components, each one accounting for a different source of deformation. This paper presents a mechanical model for the simulation of reinforced concrete (RC) wall boundary elements with lap splices, which builds on the tension chord model.
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