Special Vm Link Element For Modeling Of Shear-flexural Interaction In Frames

摘要

In the special zones of frame elements, which are used for seismic energy dissipation, inelastic interaction among the internal forces needs to be considered more precisely. This paper describes a special element called a VM link element for modeling the shear-flexural interaction in the inelastic zones of beam elements. The element may be used in the any inelastic location of frames subjected to the monotonic or cyclic loadings. The inelastic shear and flexural deformations are considered by using the multi-surfaces plasticity concept with dissimilar yield surfaces. A new kinematic hardening and new non-associated flow rules are introduced for definition of the plastic deformations and managing the yield surfaces translations, respectively. The special VM link element is examined for some shear links, and it is shown that the proposed model predictions are in good agreement with existing test results. An eccentrically braced steel frame (EBF), subjected to a strong ground motion, is modeled by using the beam and the proposed VM link elements, and shear-flexural interaction is investigated.