000019668 001__ 19668
000019668 005__ 20170118182331.0
000019668 04107 $$aeng
000019668 046__ $$k2017-01-09
000019668 100__ $$aGullu, M.Fethi
000019668 24500 $$aNonlinear Finite Element Modeling of Reinforced Concrete Structural Walls

000019668 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000019668 260__ $$b
000019668 506__ $$arestricted
000019668 520__ $$2eng$$aA relatively simple finite element modeling methodology was developed for simulating the cyclic lateral load behavior of reinforced concrete structural walls with varying levels of coupling between nonlinear flexural and shear response components. The behavioral characteristics of the constitutive panel elements incorporated in the model formulation are based on a fixed-crack-angle modeling methodology, which is effectively a smeared-stress-strain-based strut-and-tie approach that does not require ad-hoc model parameters. The constitutive panel model formulation also incorporates simple yet effective behavioral models for the shear-aggregate-interlock effects in concrete and dowel action on reinforcing bars, constituting the shear stress transfer mechanisms across the cracks. The model formulation was implemented into Matlab and model response predictions were compared with experimentally-measured responses of selected wall specimens with varying geometry and reinforcement characteristics; including relatively slender (aspect ratio of 3.0) walls with rectangular and T-shaped cross-sections, squat walls (aspect ratio of 0.5) with shear-controlled responses, and medium-rise walls (aspect ratios of 1.5–2.0) with predominant shear-flexure interaction responses. The proposed finite element modeling approach demonstrates a reasonable level accuracy in predicting the nonlinear hysteretic response of the wall specimens investigated. Accurate predictions are obtained for the experimentally-measured response attributes of the walls; including their lateral strength, stiffness, and ductility, as well as their hysteretic response characteristics. The model also provides accurate estimates of the relative contribution of nonlinear flexural and shear deformations to wall lateral displacements, and local response characteristics (e.g., strain distributions). Based on the response comparisons presented, model capabilities are assessed and possible model improvements are identified. Overall, the modeling approach proposed, despite its relatively simple formulation, is shown to provide reliable predictions of the nonlinear lateral load behavior of reinforced concrete walls with various aspect ratios and response characteristics.

000019668 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000019668 653__ $$aReinforced concrete; Wall; Model; Shear; Flexure

000019668 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000019668 720__ $$aGullu, M.Fethi$$iOrakcal, Kutay
000019668 8560_ $$ffischerc@itam.cas.cz
000019668 8564_ $$s2781468$$uhttps://invenio.itam.cas.cz/record/19668/files/4134.pdf$$yOriginal version of the author's contribution as presented on USB, paper 4134.
000019668 962__ $$r16048
000019668 980__ $$aPAPER