Open Access

ARTICLE

An Integrated Fracture Mechanics Based Approach for Non-Linear Analysis of Lightly Reinforced Concrete Beams

Ananthalakshmi K. Iyer¹, A. Rama Chra Murthy², Smitha Gopinath², Nagesh R. Iyer³

1 M.E. (Structural Engineering), Government College of Technology, Coimbatore – 641 013
2 Scientist, CSIR-Structural Engineering Research Centre, CSIR Campus, Taramani, Chennai - 600113
3 Director, CSIR-Structural Engineering Research Centre, CSIR Campus, Taramani, Chennai - 600113

Computers, Materials & Continua 2014, 42(3), 227-244. https://doi.org/10.3970/cmc.2014.042.227

Abstract

A non-linear fracture mechanics based approach is proposed to depict a typical fracture mechanism from initiation to growth, eventually leading to failure. This concept is developed for a lightly reinforced beam in flexure. The proposed model integrates the existing methodology of a Stress Intensity Factor equilibrium equation with the bridging forces developed in concrete cover and rebar. The model and solution algorithm outlined presents an elaborate understanding of the mechanism involved and is significant in predicting the behaviour of flexural members. The analysis is performed using MATLAB programming. The proposed approach ensures a maximum tolerable crack length and crack width for flexural members to prevent a catastrophic failure. Such an approach has the potential to serve as an analysis and design tool for reinforced concrete components subjected to normal conditions and towards deciding rehabilitation and strengthening measures.

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Keywords

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