Title:
Parametric Analysis and Experimental Study on Concrete Columns Reinforced by Steel-BFRP Composite Bar
Author(s):
Z. Y. Sun, G. Wu, Z. S. Wu, and J. B. Hao
Publication:
Symposium Paper
Volume:
275
Issue:
Appears on pages(s):
1-20
Keywords:
steel-BFRP composite bar (SBFCB); concrete column; post-yield stiffness; parametric analysis; experimental study
DOI:
10.14359/51682467
Date:
3/1/2011
Abstract:
A parametric analysis and experimental study of concrete columns reinforced by steel-BFRP (basalt fiber reinforced polymer) composite bar (SBFCB) were conducted. The relationship between post-yield stiffness of SBFCB and SBFCB reinforced concrete columns was investigated. The influences of reinforcement ratio, axial compression ratio, and post-yield stiffness ratio were explored. The results show that (1) under the same reinforcement ratio, the post-yield stiffness of SBFCB columns increases with the post-yield stiffness ratio of SBFCB; (2) the higher the BFRP content of SBFCB, the better deformation capacity of SBFCB column can be achieved due to the smaller curvature demand of column base; (3) a higher SBFCB post-yield stiffness ratio can delay or prevent the collapse of concrete column caused by P- effect; (4) the residual displacements of SBFCB columns are much smaller than those of ordinary RC columns, that is, the SBFCB column has a more better post-earthquake repairability.