Consistent matrices for steel framed structures with semi-rigid connections accounting for shear deformation and rotary inertia effects

Date

2017-04-15

Author

ÖZEL, HALİL FIRAT
Sarıtaş, Afşin
Tasbahji, Tayseer

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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Estimation of vibration characteristics and thus the seismic loads acted on steel framed structures are influenced by the presence of semi-rigid connections and accurate modeling of shear deformations and rotary inertia effects. This paper presents a finite element model that takes into account all these effects in order to calculate consistent stiffness and mass matrices. The formulation of the element utilizes three fields Hu-Washizu-Barr principle, where the need for displacement shape function approximation is eliminated through the use of force-based approach. The proposed model does not require extra discretization to capture localized connection response. An accurate shear correction coefficient for I shaped steel sections is implemented to represent shear deformation and rotary inertia along steel beams and columns. Numerical examples on single member, portal frame and multi-story steel framed structures verify the accuracy and robustness of the proposed element with and without semi-rigid connections.

Subject Keywords

Steel structures, Finite element method, Semi-rigid connection, I-shaped steel sections, Shear deformation, Rotary inertia, Consistent matrices, Vibration

URI

https://hdl.handle.net/11511/35952

Collections

Department of Civil Engineering, Article