Behaviour of axially and eccentrically loaded short columns reinforced with GFRP bars

International Conference on Civil Engineering and Infrastructural Issues in Emerging Economies 2017

土木建筑工程;经济学

Sreenath, S.^1 ; Balaji, S.^2 ; Raja Mohan, K. Saravana^1

School of Civil Engineering, SASTRA University, Thanjavur

613401, India^1

Kongu Engineering College, Thoppupalayam, Perundurai

638052, India^2

关键词: Corrosion of steel;    Corrosion-resistant;    Eccentrically loaded;    Energy absorption capacity;    Fibre reinforced polymer bars;    Gfrp reinforcements;    Glass fibre reinforced polymer (GFRP) bars;    Reinforced cement concretes (RCC);   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/80/1/012030/pdf
DOI  :  10.1088/1755-1315/80/1/012030

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

The corrosion of steel reinforcing bars is a predominant factor in limiting the life expectancy of Reinforced Cement Concrete (RCC) structures. Corrosion resistant Fibre Reinforced Polymer (FRP) bars can be an effective alternative to steel bars in this context. Recent investigations reported the flexural behaviour of RCC beams reinforced with Glass Fibre Reinforced Polymer (GFRP) bars. This study is meant to investigate the suitability of Sand Coated GFRP reinforcement bars in short square columns which when loaded axially and loaded with a minimum eccentricity. Standard tests to assess mechanical properties of GFRP bars and pullout test to quantify the bond strength between the bars and concrete were conducted. GFRP reinforced column specimens with a cross-sectional dimension of 100mm X 100mm and of length 1000mm were cast and tested under axial and eccentric loading. The assessed load carrying capacity was compared with that of conventional steel reinforced columns of the same size. The yield load and ultimate load at failure withstood by the steel reinforced columns were considerably more than that of GFRP reinforced columns. The energy absorption capacity of GFRP reinforced columns was also poor compared to steel reinforced columns. Both the columns exhibited nearly the same ductile behaviour. Hence GFRP reinforcements are not recommendable for compression members.