Modeling of the nonlinear behavior of steel framed structures with semi rigid connections

2015-07-21
Sarıtaş, Afşin
Özel, Halil Fırat
A mixed formulation frame finite element with internal semi-rigid connections is presented for the nonlinear analysis of steel structures. Proposed element provides accurate responses for spread of inelasticity along element length by monitoring the nonlinear responses of several crosssections, where spread of inelasticity over each section is captured with fiber discretization. Each material point on the section considers inelastic coupling between normal stress and shear stress. The formulation of the element also considers the presence of linear or nonlinear behavior of semi-rigid connection behavior without additional nodes and degrees of freedom, thus robustness of element response is maintained. Formulation of the element can include the presence of axial and shear deformations and rotation on localized connection region. For an accurate representation of cyclic behavior of connection regions, a multi-linear model is considered that accounts for strength and stiffness degradation as well as pinching of the hysteresis curves. Nonlinear response of the proposed element is assessed by considering steel framed structures with semi-rigid connections.
International Conference on Advances in Steel Structures ICASS 2015, (21 - 24 Temmuz 2015)

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Citation Formats
A. Sarıtaş and H. F. Özel, “Modeling of the nonlinear behavior of steel framed structures with semi rigid connections,” presented at the International Conference on Advances in Steel Structures ICASS 2015, (21 - 24 Temmuz 2015), Lizbon, Portekiz, 2015, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/88236.