Experimental Fatigue Assessment of CFRP-Retrofitted Reinforced Concrete Beams Subjected to Service Temperatures

Mahmoud, Hussam; Memari, Mehrdad; Atadero, Rebecca A.

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Experimental Fatigue Assessment of CFRP-Retrofitted Reinforced Concrete Beams Subjected to Service Temperatures

2018-08-01
By Mahmoud, Hussam ; Memari, Mehrdad ; Atadero, Rebecca A.

File Language:

English

Details

Creators:

Mahmoud, Hussam ; Memari, Mehrdad ; Atadero, Rebecca A.
Corporate Creators:

Mountain Plains Consortium
Corporate Contributors:

Colorado State University
Subject/TRT Terms:
Publication/ Report Number:

MPC-18-362
Resource Type:

Tech Report
Geographical Coverage:

United States
Corporate Publisher:

Mountain Plains Consortium
Abstract:

The use of Carbon Fiber Reinforced Polymers (CFRP) for the repair of civil infrastructure has been on the rise. Most studies have focused on the effect of CFRP to increase the stiffness and strength of reinforced concrete beams or columns. Limited attention has been given to the effect of CFRP on mitigating fatigue crack growth in steel reinforcement. Understanding how CFRP affects fatigue crack growth in rebar is important for predicting the impact of CFRP repairs on service life extension. This paper presents the results of an experimental study on the effect of externally bonded CFRP on slowing or arresting fatigue crack growth in the steel rebar in a reinforced concrete beam subjected to cyclic loading and service temperature. Localized debonding of the CFRP was observed and is attributed to the application of service temperature. Despite the development of localized debonding, the fatigue life was extended overall in specimens repaired with CFRP systems and subjected to service temperatures in comparison to those only repaired with CFRP. Crack growth rates were used to determine material constants for the Paris Law, which describes growth of a stable fatigue crack.
Format:

PDF
Funding:

MPC-412
Download URL:

https://rosap.ntl.bts.gov/view/dot/44228/dot_44228_DS1.pdf
File Type:

[PDF - 6.65 MB]
Collection(s):

University Transportation Centers ; US Transportation Collection
Main Document Checksum:

urn:sha256:0a6cb3c8747c523e883faa28c548647d276a55927bc86c9616580328b0cb9aa3

File Language:

English

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