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Modelling shear-flexure interaction in equivalent frame models of slender RC walls

Mergos, P.E. and Beyer, K. (2014). Modelling shear-flexure interaction in equivalent frame models of slender RC walls. The Structural Design of Tall and Special Buildings, 23(15), pp. 1171-1189. doi: 10.1002/tal.1114

Abstract

Quasi-static cyclic tests on reinforced concrete (RC) walls have shown that shear deformations can constitute a significant ratio of the total deformations when the wall is loaded beyond the elastic regime. For slender RC walls that form a stable flexural mechanism, the ratio of shear to flexural deformations remains approximately constant over the entire range of imposed displacement ductilities. This paper proposes a method for incorporating shear-flexure interaction effects in equivalent frame models of slender RC walls by coupling the shear force-shear strain relationship to the curvature and axial strain in the member. The suggested methodology is incorporated in a finite element consisting of two interacting spread inelasticity sub-elements representing flexural and shear response, respectively. The element is implemented in the general finite element code IDARC and validated against experimental results of RC cantilever walls. In a second step, it is applied in inelastic static and dynamic analyses of tall wall and wall-frame systems. It is shown that ignoring shear-flexure interaction may lead to erroneous predictions in particular of local ductility and storey drift demands.

Publication Type: Article
Additional Information: This is the accepted version of the following article: Mergos P. E., and Beyer K. (2014), Modelling shear–flexure interaction in equivalent frame models of slender reinforced concrete walls, Struct. Design Tall Spec. Build., which has been published in final form at http://dx.doi.org/10.1002/tal.1114
Publisher Keywords: reinforced concrete, slender walls, shear-flexure interaction
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Departments: School of Mathematics, Computer Science & Engineering > Engineering
URI: http://openaccess.city.ac.uk/id/eprint/4799
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