期刊
BUILDINGS
卷 13, 期 1, 页码 -出版社
MDPI
DOI: 10.3390/buildings13010026
关键词
concrete; wall-like column; FE analysis; FRP; retrofitting
Experimental and numerical investigations were conducted on the retrofitting of half-scale wall-like reinforced concrete (RC) columns. The columns were strengthened by using external confinement through fiber-reinforced polymer (FRP) wraps and/or steel/FRP strips with/without modification of the column cross-section. The axial load versus displacement and strain curves were discussed. The experimental results were compared with numerical models, showing a reasonably close agreement with less than 10% error for the peak load. Different confinement schemes led to an enhancement in the load capacity of the strengthened columns in the range of 30-42% compared to the control column. Significant ductility improvements were observed when using FRP wraps after shape modification.
Experimental and numerical investigations on the retrofitting of half-scale wall-like reinforced concrete (RC) columns were conducted. The axial compressive behavior of the control un-strengthened wall-like RC column (having a section aspect ratio of four) was compared with the strengthened columns. The columns were strengthened by employing external confinement through fiber-reinforced polymer (FRP) wraps and/or steel/FRP strips with/without modification of the column cross-section. The characteristics of axial load versus displacement and strain curves were discussed. The experimental results were also compared with the numerical models, which were first validated against the previous studies. A reasonably close agreement was achieved between the numerical and the test results with an error in prediction of less than 10% for the peak load. With the different schemes used for confinement, the enhancement in the load capacity of strengthened columns was in the range of 30-42% of the control column. In addition, significant ductility improvements were seen in schemes that employed the FRP wraps after shape modification.
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