dc.contributor.author | Sadeghian, Pedram | |
dc.contributor.author | Fam, Amir | |
dc.date.accessioned | 2017-08-02T15:00:42Z | |
dc.date.available | 2017-08-02T15:00:42Z | |
dc.date.issued | 2015-04 | |
dc.identifier.citation | Publisher's version: Sadeghian, Pedram, and Fam, Amir. (2015). Strengthening Slender Reinforced Concrete Columns Using High-Modulus Bonded Longitudinal Reinforcement for Buckling Control. American Society of Civil Engineers, 141 (4), 04014127-1 - 04014127-12. doi: 10.1061/(ASCE)ST.1943-541X.0001066 | |
dc.identifier.uri | http://hdl.handle.net/10222/73088 | |
dc.identifier.uri | https://dx.doi.org/10.1061/(ASCE)ST.1943-541X.0001066 | |
dc.description.abstract | This paper introduces a model for strengthening slender reinforced concrete columns. The proposed technique aims at controlling second-order lateral deflections using longitudinal high-modulus bonded reinforcement, thereby altering the loading path to intercept the axial load-bending moment (P-M) interaction curve at a higher axial capacity. With the availability of high and ultra-high-modulus carbon fiber–reinforced polymer (CFRP) plates, this approach should be quite efficient according to Euler’s buckling rule, in which column strength is stiffness-controlled. This approach is different from the classical transverse-wrapping method for confinement, a technique that achieves strengthening by enlarging the (P-M) diagram in the compression-controlled region. The proposed model accounts for concrete nonlinearity in compression, cracking in tension, steel rebar plasticity, and certainly geometric nonlinearity, in addition to the possibility of premature CFRP-debonding failure in tension and the lower CFRP strength in compression than tension. The model is validated against experimental results and used in a parametric study to assess the effects of slenderness ratio λλ, axial load initial eccentricity ratio e0/h, CFRP reinforcement ratio ρfρf, and modulus Ef. It was shown that significant gains in axial strength, ranging from 17 to 90%, occur as the magnitudes of λ, ρf, Ef and e0/h increase. | en_US |
dc.language.iso | en | en_US |
dc.publisher | American Society of Civil Engineers | en_US |
dc.relation.ispartof | Journal of Structural Engineering | en_US |
dc.subject | Slender | en_US |
dc.subject | Concrete | en_US |
dc.subject | Column | en_US |
dc.subject | FRP | en_US |
dc.subject | Strengthening | en_US |
dc.subject | CFRP | en_US |
dc.subject | Buckling | en_US |
dc.title | Strengthening Slender Reinforced Concrete Columns Using High-Modulus Bonded Longitudinal Reinforcement for Buckling Control | en_US |
dc.type | Text | en_US |