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

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

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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.

Item Type: Article
Additional Information: This is the peer reviewed version of the following article: Mergos, P.E. & Beyer, K. (2014). Modelling shear-flexure interaction in equivalent frame models of slender reinforced concrete walls. Structural Design of Tall and Special Buildings, 23(15), pp. 1171-1189. doi: 10.1002/tal.1114, which has been published in final form at http://onlinelibrary.wiley.com/doi/10.1002/tal.1114/full. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Uncontrolled Keywords: Civil Engineering
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TH Building construction
Divisions: School of Engineering & Mathematical Sciences
URI: http://openaccess.city.ac.uk/id/eprint/12621

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