Near Surface Mounted Composites for Flexural Strengthening of Reinforced Concrete Beams

Existing structural components require strengthening after a certain period of time due to increases in service loads, errors in design, mechanical damage, and the need to extend the service period. Externally-bonded reinforcement (EBR) and near-surface mounted (NSM) reinforcement are two preferred...

Full description

Saved in:
Bibliographic Details
Published inPolymers Vol. 8; no. 3; p. 67
Main Authors Hosen, Md Akter, Jumaat, Mohd Zamin, Alengaram, Ubagaram Johnson, Islam, A B M Saiful, Bin Hashim, Huzaifa
Format Journal Article
LanguageEnglish
Published Switzerland MDPI AG 03.03.2016
MDPI
Subjects
analytical model
Carbon fiber reinforced plastics
cover separation
crack behavior
Failure
flexural behavior
Fracture mechanics
Mathematical analysis
NSM composites
Reinforced concrete
Reinforcement
Reinforcing steels
Strengthening
cover separation
NSM composites
analytical model
flexural behavior
crack behavior
Online AccessGet full text

Cover

More Information
Summary:Existing structural components require strengthening after a certain period of time due to increases in service loads, errors in design, mechanical damage, and the need to extend the service period. Externally-bonded reinforcement (EBR) and near-surface mounted (NSM) reinforcement are two preferred strengthening approach. This paper presents a NSM technique incorporating NSM composites, namely steel and carbon fiber-reinforced polymer (CFRP) bars, as reinforcement. Experimental and analytical studies carried out to explore the performance of reinforced concrete (RC) members strengthened with the NSM composites. Analytical models were developed in predicting the maximum crack spacing and width, concrete cover separation failure loads, and deflection. A four-point bending test was applied on beams strengthened with different types and ratios of NSM reinforcement. The failure characteristics, yield, and ultimate capacities, deflection, strain, and cracking behavior of the beams were evaluated based on the experimental output. The test results indicate an increase in the cracking load of 69% and an increase in the ultimate load of 92% compared with the control beam. The predicted result from the analytical model shows good agreement with the experimental result, which ensures the competent implementation of the present NSM-steel and CFRP technique.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:2073-4360
2073-4360
DOI:10.3390/polym8030067