An advanced plastic hinge method for steel members with closed thin walled section is presented in this paper. This method uses the tangent coefficient matrix obtained by the numerical integration of the hardening moduli of the fibers about the member section to calculate the generalized plastic strain increments. The effect of the shear stress due to torsional load is considered in the fiber level using the von Mises yield criterion. The accuracy of the stiffness matrix is examined by some numerical examples.
