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
e ects are taken into account. This model shows good agreement with experimental results that have been
reported in other research works.
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