Modeling the Full Behavior of Reinforced Concrete Flanged Beams under Torsion

Luís Bernardo

doi:10.3390/app9132730

Abstract

Recently, an analytical model called the generalized softened variable angle truss-model (GSVATM) aimed to predict the full behavior of reinforced concrete (RC) rectangular beams under torsion. In this article, such a model is used to compute the full torsional behavior of RC flanged beams, namely T- and L-shaped beams. The calculation procedure to include the influence of the flanges is described. A comparative analysis between the predictions from the GSVATM and some experimental results, related with RC flanged beams under torsion and found in the literature, is also presented. From this comparative analysis and for high loading levels, the GSVTM is reliable. Yet, for low loading levels, the theoretical model still needs to be refined.

Highlights

The space truss analogy (STA) constitutes a comprehensive theoretical model which allows to understand and model the torsional behavior of reinforced concrete (RC) beams
A similar calculation procedure as the one proposed by Deifalla in 2015 [36] to model RC T- and similar calculation procedure as the one proposed by Deifalla in 2015 [36] to model RC T- and LL-shaped beams was adopted, which constitutes a generalization of the one proposed by Deifalla and shaped beams was adopted, which constitutes a generalization of the one proposed by Deifalla and Ghobarah in 2010 [37] for RC rectangular beams under torsion wrapped with fiber reinforced polymers
A theoretical model based on the generalized softened variable angle truss-model (GSVATM) for RC rectangular beams was proposed to predict the full behavior of RC flanged beams under torsion, namely T- and L-shaped beams

Summary

Introduction

The space truss analogy (STA) constitutes a comprehensive theoretical model which allows to understand and model the torsional behavior of reinforced concrete (RC) beams. It is used by several researchers and constitutes the base model for most of the current codes of practice. The model is able to predict the full response of RC beams under torsion, including low loading levels. This is important because some requirements from codes of practice include design rules for service loads. Among the developments of the STA that are proposed in the literature, the generalized softened variable angle truss-model (GSVATM) is one of the most recent

Objectives

Methods

Conclusion