Abstract. In this paper, the cyclic nonlinear behavior of a brace element has been modeled. A brace
element is modeled as two elastic beam-column segments, which are connected to each other via a plastic
hinge. The far ends of the element are hinged. By a suitable combination of the isotropic and kinematical
hardening rules of plasticity, the nonlinear axial force-displacement relation for a beam element has been
derived. So, the strain hardening, strain softening, tangential modulus of elasticity and Bauschinger
eects are taken into account. This model shows good agreement with experimental results that have been
reported in other research works.