4.2.3.10. SFI MVLEM - Cyclic Shear-Flexure Interaction Model for RC Walls

Developed and implemented by:

Kristijan Kolozvari (CSU Fullerton)

Kutay Orakcal (Bogazici University)

Leonardo Massone (University of Chile, Santiago)

John Wallace (UCLA)

The SFI_MVLEM command is used to construct a Shear-Flexure Interaction Multiple-Vertical-Line-Element Model (SFI-MVLEM, Kolozvari et al., 2018, 2015a, b, c; Kolozvari 2013), which captures interaction between axial/flexural and shear behavior of RC structural walls and columns under cyclic loading. The SFI_MVLEM element (Figure 1) incorporates 2-D RC panel behavior described by the Fixed-Strut-Angle-Model (nDMaterial FSAM; Ulugtekin, 2010; Orakcal et al., 2012), into a 2-D macroscopic fiber-based model (MVLEM). The interaction between axial and shear behavior is captured at each RC panel (macro-fiber) level, which further incorporates interaction between shear and flexural behavior at the SFI_MVLEM element level.

element('SFI_MVLEM', eleTag, *eleNodes, m, c, '-thick', *thick, '-width', *widths, '-mat', *mat_tags)

eleTag (int)	unique element object tag
eleNodes (list (int))	a list of two element nodes
m (int)	Number of element macro-fibers
c (float)	Location of center of rotation with from the iNode, c = 0.4 (recommended)
Thicknesses (list (float))	a list of m macro-fiber thicknesses
Widths (list (float))	a list of m macro-fiber widths
Material_tags (list (int))	a list of m macro-fiber nDMaterial1 tags

See also

Notes

Kolozvari K., Orakcal K., and Wallace J. W. (2015a). “New opensees models for simulating nonlinear flexural and coupled shear-flexural behavior of RC walls and columns”, Computers and Structures, Volume 196, February 2018, Pages 246-262, doi

Kolozvari K., Orakcal K., and Wallace J. W. (2015a). ”Modeling of Cyclic Shear-Flexure Interaction in Reinforced Concrete Structural Walls. I: Theory”, ASCE Journal of Structural Engineering, 141(5), 04014135 doi

Kolozvari K., Tran T., Orakcal K., and Wallace, J.W. (2015c). ”Modeling of Cyclic Shear-Flexure Interaction in Reinforced Concrete Structural Walls. II: Experimental Validation”, ASCE Journal of Structural Engineering, 141(5), 04014136 doi

Kolozvari K., Orakcal K., and Wallace J. W. (2015c). “Shear-Flexure Interaction Modeling of reinforced Concrete Structural Walls and Columns under Reversed Cyclic Loading”, Pacific Earthquake Engineering Research Center, University of California, Berkeley, PEER Report No. 2015/12

Kolozvari K. (2013). “Analytical Modeling of Cyclic Shear-Flexure Interaction in Reinforced Concrete Structural Walls”, PhD Dissertation, University of California, Los Angeles.