A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Behaviour and Strength Prediction of Reinforced Recycled Aggregate Concrete Columns Confined with CFRP Wraps
https://orcid.org/http://orcid.org/0000-0002-9535-9889
Detailed experimental investigations were carried out to study the behaviour of confined reinforced concrete (RC) columns cast with recycled aggregate concrete (RAC). For this purpose, RC columns were cast with 0, 30, 50 and 100% replacement of natural coarse aggregates (NCA) with recycled coarse aggregates (RCA) and confinement was provided using externally bonded carbon fibre reinforced polymer (CFRP) wraps. The failure load and failure mode of columns are studied and investigated under uniaxial compression. It is observed that with an increase in the RCA replacement percentages, the peak load of columns decreases. However, no significant difference in the peak loads and overall structural behaviour is found for columns having 30% RCA compared with natural aggregate columns (NAC). Furthermore, it has been observed that the confinement provided by the CFRP wrap can effectively improve the behaviour and ultimate axial load-carrying capacity of the RC column. A significant increase in load-carrying capacity of confined columns is observed when compared with unconfined columns having similar replacement percentages of RCA. The load-carrying capacities of unconfined and confined RC columns are compared with ACI 318-19 and ACI 440.2R-17 codes, respectively. It is found that the equations provided by these standards can be used safely to estimate the load-carrying capacities of RC unconfined and confined columns made with RCA for replacement percentages in the range of 30–50%.
Behaviour and Strength Prediction of Reinforced Recycled Aggregate Concrete Columns Confined with CFRP Wraps
https://orcid.org/http://orcid.org/0000-0002-9535-9889
Detailed experimental investigations were carried out to study the behaviour of confined reinforced concrete (RC) columns cast with recycled aggregate concrete (RAC). For this purpose, RC columns were cast with 0, 30, 50 and 100% replacement of natural coarse aggregates (NCA) with recycled coarse aggregates (RCA) and confinement was provided using externally bonded carbon fibre reinforced polymer (CFRP) wraps. The failure load and failure mode of columns are studied and investigated under uniaxial compression. It is observed that with an increase in the RCA replacement percentages, the peak load of columns decreases. However, no significant difference in the peak loads and overall structural behaviour is found for columns having 30% RCA compared with natural aggregate columns (NAC). Furthermore, it has been observed that the confinement provided by the CFRP wrap can effectively improve the behaviour and ultimate axial load-carrying capacity of the RC column. A significant increase in load-carrying capacity of confined columns is observed when compared with unconfined columns having similar replacement percentages of RCA. The load-carrying capacities of unconfined and confined RC columns are compared with ACI 318-19 and ACI 440.2R-17 codes, respectively. It is found that the equations provided by these standards can be used safely to estimate the load-carrying capacities of RC unconfined and confined columns made with RCA for replacement percentages in the range of 30–50%.
Behaviour and Strength Prediction of Reinforced Recycled Aggregate Concrete Columns Confined with CFRP Wraps
https://orcid.org/http://orcid.org/0000-0002-9535-9889
Detailed experimental investigations were carried out to study the behaviour of confined reinforced concrete (RC) columns cast with recycled aggregate concrete (RAC). For this purpose, RC columns were cast with 0, 30, 50 and 100% replacement of natural coarse aggregates (NCA) with recycled coarse aggregates (RCA) and confinement was provided using externally bonded carbon fibre reinforced polymer (CFRP) wraps. The failure load and failure mode of columns are studied and investigated under uniaxial compression. It is observed that with an increase in the RCA replacement percentages, the peak load of columns decreases. However, no significant difference in the peak loads and overall structural behaviour is found for columns having 30% RCA compared with natural aggregate columns (NAC). Furthermore, it has been observed that the confinement provided by the CFRP wrap can effectively improve the behaviour and ultimate axial load-carrying capacity of the RC column. A significant increase in load-carrying capacity of confined columns is observed when compared with unconfined columns having similar replacement percentages of RCA. The load-carrying capacities of unconfined and confined RC columns are compared with ACI 318-19 and ACI 440.2R-17 codes, respectively. It is found that the equations provided by these standards can be used safely to estimate the load-carrying capacities of RC unconfined and confined columns made with RCA for replacement percentages in the range of 30–50%.
Behaviour and Strength Prediction of Reinforced Recycled Aggregate Concrete Columns Confined with CFRP Wraps
Iran J Sci Technol Trans Civ Eng
Khan, Asad-ur-Rehman (author) / Fareed, Shamsoon (author) / Nasir, Rida (author) / Xiao, Jianzhuang (author)
2022-08-01
13 pages
Article (Journal)
Electronic Resource
English
Concrete columns confined with CFRP wraps
| British Library Online Contents | 2014
Concrete columns confined with CFRP wraps
| Online Contents | 2013
Concrete columns confined with CFRP wraps
| Online Contents | 2013
Concrete columns confined with CFRP wraps
| Online Contents | 2014
Concrete columns confined with CFRP wraps
| Springer Verlag | 2013