Effect of Using ECC Layer on the Flexural Performance of RC Beams Previously Strengthened with EB CFRP Laminates

Author(s)/Creator(s)

Mohamed Emara
Ayman El-Zohairy
Mahmoud Fekry
Mohamed Husain

Publication Title

Sustainability

Document Type

Article

Abstract/Description

This paper studies the efficiency of applying an engineered cementitious composite (ECC) layer to the tensile surface of (RC) beams that were previously strengthened using externally bonded (EB) carbon fiber-reinforced polymer (CFRP) laminates. One control and ten strengthened RC beams were produced and tested utilizing a four-point loading regime. For strengthened beams, two beams were kept strengthened using only CFRP, and additional ECC layers were added to the rest of the strengthened beams. The CFRP width and overlap length and position were among the test factors. Experimental results revealed that strengthening RC beams with CFRP laminates enhanced both the stiffness and flexural capacity of beams. Additional enhancements were obtained through the application of the additional ECC layers. The existence of the ECC layer alongside the CFRP laminate improved the flexural capacity by 102% and 125% when using CFRP widths of 50 mmand100mm,respectively, and the stiffness was improved by an average value of 318%. Three-dimensional (3D) finite element models (FEMs) were developed using ABAQUS software and verified against the experimental results to model the response of the tested beams. The verified model was used to conduct a parametric study to consider the effect of the ECC layer thickness and the reinforcement ratio on the strengthened beam behavior. The numerical results revealed that the effect of the reinforcement ratio was more significant than the ECC layer thickness in enhancing the load-displacement response, especially after the cracking stage.

Department

Engineering and Technology

First Page

16990

Last Page

17010

DOI

10.3390/su142416990

Volume

14

ISSN

2071-1050

Date

12-18-2022

Citation Information

Emara, Mohamed; El-Zohairy, Ayman; Fekry, Mahmoud; and Husain, Mohamed, "Effect of Using ECC Layer on the Flexural Performance of RC Beams Previously Strengthened with EB CFRP Laminates" (2022). Faculty Publications. 223.
https://digitalcommons.tamuc.edu/cose-faculty-publications/223