Behavior of Rectangular RC Columns Confined with BFRP sheets Subjected to Axial Loading
Yehia A. Kotp,  Omar A. Farghal,  Mohammed F. M. Fahmy
In this paper an investigation on the behavior of short rectangular reinforced concrete columns wrapped with fiber reinforced polymer (FRP) sheets under axial compression loading was conducted. This study aims at experimentally evaluating the performance of these strengthened columns by using a new promising FRP material (Basalt fiber reinforced polymer (BFRP)) sheets. Moreover, it aims to investigate the limit of the cross-sectional aspect ratio parameter which has been the subject of controversial for the last two decades. Hence, eight RC columns with aspect ratios (1.0, 1.5, 2.0 and 2.5) were tested .The behavior of columns in the axial and transverse directions was analyzed. After that, some existing confinement models for rectangular RC columns were used to predict the nominal compressive strength of rectangular RC BFRP –confined columns sheets. From this research, it can be concluded that, using BFRP sheets in confining of RC columns increases the carrying capacity and ductility. Also, the limit of the aspect ratio at which the gained strength becomes insignificant is 2.0. Finally, the model of Wang and Hsu  has a good agreement to predict the nominal compressive strength of rectangular RC columns strengthened with BFRP sheets.
Keywords- Reinforced concrete columns, aspect ratio, FRP, Basalt fiber reinforced polymer (BFRP), full wrapping
Cite this Article
Yehia A. Kotp,  Omar A. Farghal,  Mohammed F. M. Fahmy,   "Behavior of Rectangular RC Columns Confined with BFRP sheets Subjected to Axial Loading"
, International Journal of Engineering Development and Research (IJEDR), ISSN:2321-9939, Volume.6, Issue 4, pp.215-229, November 2018, Available at :http://www.ijedr.org/papers/IJEDR1804041.pdf