Quantifying moment redistribution in FRP-strengthened RC beams

Author:

Tajaddini Abbas1,Ibell Tim2,Darby Antony2,Evernden Mark2,Silva Pedro3

Affiliation:

1. Department of Architecture and Civil Engineering, University of Bath, Bath, UK (corresponding author: )

2. Department of Architecture and Civil Engineering, University of Bath, Bath, UK

3. School of Engineering and Applied Science, The George Washington University, Washington, DC, USA

Abstract

Consideration of moment redistribution (MR) in the design of continuous reinforced concrete (RC) beams results in an efficient and economical design. Adding fibre-reinforced polymer (FRP) materials to reinforced structures to enhance flexural capacity leads to a reduction in ductility, such that design standards severely limit use of the MR in their design. This has forced engineers to use elastic analyses for strengthening design, which can lead to FRP wastage. To overcome this, complicated or empirical solutions have been applied to solve the problem of MR in strengthened concrete members, with limited success. This paper presents a novel theoretical strategy for quantifying and tracking MR in such members by employing basic structural mechanics without any need for estimating rotation capacity or ductility. Fully non-linear flexural behaviour of continuous strengthened members can be predicted and any geometry, loading arrangement and strengthening technique or configuration can be considered. The numerical model is validated against existing experimental data from the literature. Good agreement is shown between the experimental and numerical data, with the significance of this work being that, potentially, for the first time MR could credibly and confidently be incorporated into design guides for FRP strengthening of RC structures.

Publisher

Thomas Telford Ltd.

Subject

Building and Construction,Civil and Structural Engineering

Cited by 3 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Consideration of External Reinforcement Based on Carbon Fibers for the Redistribution of Bending Moments in Slabs;Lecture Notes in Civil Engineering;2022-09-03

2. Moment redistribution in continuous steel-fibre-reinforced concrete slabs;Proceedings of the Institution of Civil Engineers - Structures and Buildings;2020-03

3. Editorial;Proceedings of the Institution of Civil Engineers - Structures and Buildings;2016-11

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