Abstract
This study investigates the ability of a finite element model based on curved shell element formulation in predicting nonlinear behavior of planar RC structural walls, identifying the strengths and limitations of this modeling approach. For this purpose, a parametric validation is conducted in addition to verification of the model simulation against experimental results of several wall specimens tested in literature. The effects of variations in total length, thickness, shear-span ratio, axial load ratio, confinement, as well as the horizontal and vertical reinforcement ratios are investigated at both global and local levels. For scrutinizing the global response, lateral load versus total, flexural and shear deformation predictions are used. For local response, sensitivity of the stress and strain distributions throughout the length and height of the wall models to the parameters noted above is evaluated. The capabilities and deficiencies of the modelling approach are discussed in detail in light of the numerical versus experimental as well as parametric verifications. The model is found to be able to predict most of the experimentally observed failure mechanisms of rectangular walls including global out-of-plane instability under in-plane loading, concrete crushing at the base, diagonal tension and diagonal compression as well as sliding shear. The model is not able to represent bar buckling, bar fracture and the potential subsequent secondary failure modes such as instability of the compression boundary zone due to progressive asymmetric concrete crushing at the base. The parametric study indicated sensitivity of the model response to the variation of the parameters known to be influential on the nonlinear response of planar RC walls.
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The authors wish to acknowledge the financial support provided by the Ministry of Business, Innovation, and Employment (MBIE) and the Quake Centre at the University of Canterbury to conduct this research.
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Dashti, F., Dhakal, R.P. & Pampanin, S. A parametric investigation on applicability of the curved shell finite element model to nonlinear response prediction of planar RC walls. Bull Earthquake Eng 17, 6515–6546 (2019). https://doi.org/10.1007/s10518-019-00582-8
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DOI: https://doi.org/10.1007/s10518-019-00582-8