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Mixed Formulation of Inelastic Composite Shear Beam Element
| 题名： | Mixed Formulation of Inelastic Composite Shear Beam Element |
| 正文语种： | 英文 |
| 作者： | Dipankar Das; Ashraf Ayoub |
| 作者单位： | City, Univ, of London |
| 关键词： | formulation；element；composite；mixed；stic；beam；last；deform；coupling；stability |
| 摘要： | 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 are 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, Timoshenko beam theory has been adopted in deriving the section kinematics equations. The J2 plasticity following a radial return mapping algorithm and a fixed crack smeared softened membrane model are used to simulate the multiaxial stress state in steel and concrete, respectively. The accuracy and efficiency of the mixed-based formulation was evaluated by comparing the responses at local and global levels with the displacement-based formulation. |
| 出版日期： | 2020.10 |
| 出版年： | 2020 |
| 期刊名称： | Journal of Structural Engineering |
| 卷： | Vol.146 |
| 期： | No.10 |
| 页码： | 04020222 |
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