126.96.36.199. SFI_MVLEM_3D - 3-D Shear-Flexure-Interaction Element for RC Walls¶
The SFI-MVLEM-3D model (Figure 1a) is a three-dimensional four-node element with 24 DOFs that incorporates axial-flexural-shear interaction and can be used for nonlinear analysis of non-rectangular reinforced concrete walls subjected to multidirectional loading. The SFI-MVLEM-3D model is an extension of the two-dimensional, two-node Shear-Flexure-Interaction Multiple-Vertical-Line-Element-Model (SFI-MVLEM). The baseline SFI-MVLEM, which is essentially a line element for rectangular walls subjected to in-plane loading, is extended in this study to a three-dimensional model formulation by applying geometric transformation of the element degrees of freedom that converted it into a four-node element formulation (Figure 1b), as well as by incorporating linear elastic out-of-plane behavior based on the Kirchhoff plate theory (Figure 1c). The in-plane and the out-of-plane element behaviors are uncoupled in the present model.
This element shall be used in Domain defined with -ndm 3 -ndf 6.
element('SFI_MVLEM_3D', eleTag, *eleNodes, m, '-thick', *thicks, '-width', *widths, '-mat', *matTags, <'-CoR', c>, <'-ThickMod', tMod>, <'-Poisson', Nu>, <'-Density', Dens>)
unique element object tag
a list of four element nodes defined in the counter-clockwise direction
number of element uniaxial fibers
a list of
a list of
a list of
mmaterial tags corresponding to nDmaterial FSAM
location of center of rotation from the base (optional; default = 0.4 (recommended))
thickness multiplier (optional; default = 0.63 equivalent to 0.25Ig for out-of-plane bending)
Poisson ratio for out-of-plane bending (optional; default = 0.25)
density (optional; default = 0.0)
More information available HERE and in the following reference:
- Kolozvari, K. Kalbasi, K. Orakcal & J. W. Wallace, “Three-Dimensional Shear-Flexure Interaction Model for Analysis of Non-Planar Reinforced Concrete Walls”, Journal of Building Engineering, Volume 44, December 2021, 102946.