Rapid repair of severely damaged reinforced concrete columns under combined axial compression and flexure: An experimental study

Chellapandian, M and S, Suriya Prakash (2018) Rapid repair of severely damaged reinforced concrete columns under combined axial compression and flexure: An experimental study. Construction and Building Materials, 173. pp. 368-380. ISSN 0950-0618

Full text not available from this repository. (Request a copy)

Abstract

Reinforced concrete (RC) columns are in general subjected to combination of axial compression and bending loads. A rapid repair technique for effectively restoring the original strength and stiffness of severely damaged RC columns under combined bending and compression loads is investigated. In total, six RC columns are tested under uniaxial eccentric compression at an eccentricity (e) to depth ratio (d) of 0.63. The columns are initially subjected to severe damage corresponding to a concrete compressive strain (εc) of 0.0035. Damaged columns had buckling of longitudinal reinforcement and concrete crushing. After severe damage, the columns are repaired with three different techniques using (i) quick set cement grout mortar (QS), (ii) near surface mounting (NSM) of CFRP laminates and (iii) hybrid FRP strengthening using a combination of NSM and external bonding (EB) of CFRP fabric. The specimens are tested under high ratio of eccentric compression (e/d = 0.63) in a displacement controlled mode. The performance of different repair techniques under eccentric compression is compared with the similar specimens tested under concentric compression. Test results revealed that hybrid FRP strengthening is very efficient in fully restoring the original strength and failure displacement under combined compression and bending loads. Only NSM strengthening is found to be very efficient under eccentric compression than in concentric compression.

[error in script]
IITH Creators:
IITH CreatorsORCiD
S, Suriya Prakashhttp://orcid.org/0000-0003-0319-1773
Item Type: Article
Uncontrolled Keywords: CFRP, Concentric compression damaged column, Eccentric compression, Hybrid FRP technique Rapid repair RC column
Subjects: Civil Engineering
Divisions: Department of Civil Engineering
Depositing User: Team Library
Date Deposited: 27 Jul 2018 09:46
Last Modified: 27 Jul 2018 09:46
URI: http://raiith.iith.ac.in/id/eprint/4322
Publisher URL: http://doi.org/10.1016/j.conbuildmat.2018.04.037
OA policy: http://www.sherpa.ac.uk/romeo/issn/0950-0618/
Related URLs:

Actions (login required)

View Item View Item
Statistics for RAIITH ePrint 4322 Statistics for this ePrint Item