Numerical and experimental study of concrete I-beam subjected to bending test with cyclic load

Paula De Oliveira Ribeiro,Gustavo De Miranda Saleme Gidrão,Luiz Vicente Vareda,Maximiliano Malite,Ricardo Carrazedo

doi:10.1590/1679-78255880

Paula De Oliveira Ribeiro, Gustavo De Miranda Saleme Gidrão + Show 3 more

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https://doi.org/10.1590/1679-78255880

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Abstract

This paper provides guidelines for cyclic loading bending test simulation and modal analysis of a reinforced concrete I-beam. For this purpose, experimental and numerical cyclic bending test were performed. In the experimental study, the natural frequencies of the structure in the intact and damaged states were measured. The simulation of the cyclic bending test was done with Concrete Damaged Plasticity model (CDP), implemented in Abaqus finite element software. Based on the experimental results, different constitutive models for concrete were evaluated. In order to evaluate the dynamic behavior of the structure in the numerical model, the automatic calibration of the finite element model by Genetic Algorithm (GA) was used. With the calibrated numerical model, methodologies for estimating the overall damage of the structure based on its dynamic properties were proposed. The results confirm that the well-designed numerical model is able to efficiently represent the cyclic loading bending test. In addition, the proposed global damage estimates demonstrate the coherence between numerical and experimental models.

Highlights

Physical nonlinearity of concrete can be treated with different models, namely: nonlinear elastic, elastoplastic and elastoplastic damage models
The study by Genikomsou and Polak (2015) is notable, in which nonlinear finite element analysis was performed on reinforced concrete pillar connections under static and pseudo-dynamic loads, investigating the failure modes in terms of final load and cracking patterns
3 OBJECTIVES Given the context and numerical formulation properly presented, this paper advances to demonstrate a numericalexperimental study of a reinforced concrete I-beam, subjected to cyclic loading, using the constitutive model for Concrete Damaged Plasticity

Summary

Introduction

Physical nonlinearity of concrete can be treated with different models, namely: nonlinear elastic, elastoplastic and elastoplastic damage models. An alternative to overcome this problem is to use for example elastoplastic damage models, which presents the advantage of computing both the plastic strain accumulation and reducing the elasticity modulus due to damage of the material, which are more accurate and realistic (Genikomsou and Polak, 2015; Jankowiak and Lodygowski, 2005). In this sense, the Concrete Damaged Plasticity (CDP), implemented in Abaqus commercial finite element software (Abaqus, 2014), is a model able to compute both material damage and the accumulation of plastic strain. The works of Chen and Graybeal (2011), Graybeal (2008) and Singh et al (2017) stand out for simulating the flexural behavior of UHPFRC beams using concrete damaged plasticity

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