Design Optimization for Shear Strengthening of RC Beam Using CFRP Laminate with Embedded Double Connector

DOI

10.2991/978-94-6463-884-4_59How to use a DOI?

Keywords

Design Optimization; RC Beam; Shear Strengthening; EBR Method; CFRP Laminate; Embedded Double Connector Anchor

Abstract

Carbon fiber reinforced polymer (CFRP) laminate is one of the most popular shear strengthening materials due to its extensive physical and mechanical properties. Several design guidelines or methods have been developed for the shear strengthening of RC beams utilizing CFRP laminate to optimize the requirement of strengthening materials without sacrificing the structural performance. Hence, this study focused on optimizing the shear strengthening design of RC beams using EBR-CFRP laminate with the embedded double connector anchor system. Three (03) full-scale RC beams with a dimension of 1500 mm x 300 mm x 150 mm were fabricated with normal-strength concrete, including a control specimen. According to the strain compatibility model and a design laminate strain of 0.004 (ACI 440), the CFRP laminate spacings were found to be 150 mm and 200 mm, respectively. The result exhibited that the load-carrying capacity of the beams strengthened with 150 mm and 200 mm spacings of CFRP laminate was increased by 40.84% and 32.67%, respectively, compared to the control beam. It was found that the strain compatibility model required 33.33% more strengthening materials than the ACI 440 design strain (0.004) model for increasing the load-carrying capacity by only 6.16% compared to the ACI 440 design strain model. Both of the strengthening methods significantly increased the ductility of the beams. Moreover, the strain compatibility model ensured the flexural failure by eliminating debonding. In contrast, the ACI 440 design strain (0.004) model helped to delay the debonding and prevented the complete separation of the CFRP laminate. Considering all the structural performances investigated in this study, the ACI 440 design strain (0.004) model was found to be a more efficient method than the strain compatibility model for shear-strengthening of RC beams using CFRP laminate with embedded double connector anchor.

Copyright

© 2025 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Md Ashraful Alam
AU  - Md Delwar Hossain Talukder
AU  - Md. Mehedi Hasan Polash
PY  - 2025
DA  - 2025/11/18
TI  - Design Optimization for Shear Strengthening of RC Beam Using CFRP Laminate with Embedded Double Connector
BT  - Proceedings of the 8th International Conference on Engineering Research, Innovation, and Education 2025 (ICERIE 2025)
PB  - Atlantis Press
SP  - 494
EP  - 502
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-884-4_59
DO  - 10.2991/978-94-6463-884-4_59
ID  - Alam2025
ER  -