Numerical modelling of cross-section variations of metal structures

Abstract

In this paper, the modelling of variable cross-sections of the members used in metal structures has been done. For this purpose, a four nodes finite element is used. The finite element stiffness matrix for the case of changes during the cross-section is limited to linear gain. Nodal loads equivalent to the weight to the case that the cross-sectional area changes during the linear component is limited and The nodal loads equivalent centrifugal force to form the cross-section is a fixed limit, obtained. To evaluate the accuracy of model, two samples including a rotary bar and a rotary rod has been checked. Conclusions show that modelling with this method gives appropriate results