Title:
Modeling Shear-Flexure Interaction in Reinforced Concrete Elements Subjected to Cyclic Lateral Loading
Author(s):
Luca Martinelli
Publication:
Structural Journal
Volume:
105
Issue:
6
Appears on pages(s):
675-684
Keywords:
cyclic shear; fiber element; reinforced concrete; shear-flexure interaction.
DOI:
10.14359/20095
Date:
11/1/2008
Abstract:
An enhanced fiber element is formulated to model the effects of shear-flexure interaction in reinforced concrete (RC) elements subjected to cyclic loading. In this stiffness-based element, adopting the Timoshenko beam theory, shear and flexural behavior are linked by means of kinematical assumptions. In bending, different from standard fiber elements, the cross-sectional fibers have the direction of the compressive principal stress and are not aligned with the element longitudinal axis. This accounts for the contributions to shear strength due to both the arch action and the inclined thrust-line developing in squat elements. Additionally, in shear, the so-called Mörsch’s truss is explicitly modeled considering both the tension and compression concrete diagonal, allowing for adopting only one truss for cyclic loading. The nonlinear behavior of materials is described by means of appropriate constitutive relations for which the critical implementation issues are highlighted. The proposed element has been validated by comparison with selected experimental results.