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Mixed Formulation of Inelastic Composite Shear Beam Element

Ayoub, A. (2020). Mixed Formulation of Inelastic Composite Shear Beam Element. Journal of Structural Engineering, 146(10), article number 04020222. doi: 10.1061/(asce)st.1943-541x.0002648


This study presents a new beam element formulation following a Hellinger-Reissner functional for composite members considering coupling between bond-slip and shear deformations. A robust state determination along with new stability criteria for the mixed-based formulation is proposed. The constitutive laws of the concrete, steel, and shear connectors are used to derive the inelastic coupled axial-flexural-shear interaction of the composite element. To consider shear deformations, a Timoshenko beam theory has been adopted in deriving the section kinematics equations. J2 plasticity following radial return mapping algorithm and fixed crack smeared softened membrane model are used to simulate the multi-axial stress state in steel and concrete respectively. The accuracy and efficiency of the mixed-based formulation wasevaluated by comparing the responses at local and global levels with the displacement-based formulation.

Publication Type: Article
Additional Information: This material may be downloaded for personal use only. Any other use requires prior permission of the American Society of Civil Engineers. This material may be found at
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TH Building construction
Departments: School of Science & Technology > Engineering
SWORD Depositor:
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