Compressive Behavior of Concrete Confined with GFRP Tubes and Steel Spirals

Polymers

Xiaoxun Sun¹  Liang Huang¹  Deju Zhu¹  Libo Yan² 

[1] College of Civil Engineering, Hunan University, Changsha 410082, China;Department of Organic and Wood-Based Construction Materials,Technical University of Braunschweig, Hopfengarten 20, Braunschweig 38102, Germany;

关键词: confinement;    concrete;    GFRP;    composite materials;    spiral;    compressivestress–strain behavior;    stress–strain model;   

DOI  :  10.3390/polym7050851

来源: DOAJ

【 摘 要 】

This paper presents the experimental results and analytical modeling of theaxial compressive behavior of concrete cylinders confined by both glass fiber-reinforced polymer (GFRP) tube and inner steel spiral reinforcement (SR). The concrete structure is termed as GFRP–SR confined concrete. The number of GFRP layers (1, 2, and 3 layers) and volumetric ratios of SR (1.5% and 3%) were the experimental variables. Test results indicate that both GFRP tube and SR confinement remarkably increase the ultimate compressive strength, energy dissipation capacity, and ductility of concrete. The volumetric ratio of SR has a more pronounced influence on the energy dissipation capacity of confined concrete with more GFRP layers. In addition, a stress–strain model is presented to predict the axial compressive behavior of GFRP–SR confined concrete. Comparisons between the analytical results obtained using the proposed model and experimental results are also presented.

【 授权许可】

Unknown