خلاصة:
This article presents an experimental study related to the structural behavior
of slender square columns strengthened by carbon fiber reinforced polymer
(CFRP) , normal strength concrete (NSC) under biaxial bending moment.
Eight slender columns samples were tested under biaxial eccentric
compression at failure and divided into three groups to examine the
variables that columns have different reinforcement ratio, the different
dimensions of the column cross section, and the effect of slenderness ratio
of the column. Among those, one unwrapped column was selected as
reference specimen. The results clearly show that (CFRP) wrapping can
improve the structural performance of the columns by providing greater
load-bearing capacity and ductility than unwrapped columns. The effects of
the test parameters are highlighted and compared.
ملخص الجهاز:
Behavior of Reinforced Concrete Slender Column Strengthened using CFRP when Subjected to Biaxial Eccentric Loading Salah T Nimnim1 , Batool W Hassin 2 1.
Abstract This article presents an experimental study related to the structural behavior of slender square columns strengthened by carbon fiber reinforced polymer (CFRP), normal strength concrete (NSC) under biaxial bending moment.
Eight slender columns samples were tested under biaxial eccentric compression at failure and divided into three groups to examine the variables that columns have different reinforcement ratio, the different dimensions of the column cross section, and the effect of slenderness ratio of the column.
20021; Bank 20062; Hollaway and Teng 20083; Rasheed 20144; Eid and Paultre 20174; Pour et al.
201815) examined the reinforcement effect in short and long columns and the eccentric loading behavior with different wrapping of CFRP and the effect of slenderness.
To enable to provide biaxial loading application, two heavily reinforced concrete supports (200 × 200 × 200) mm were constructed at both ends of the column, figure.
4. The typical failure mechanism of the tested CFRP confined slender strengthened concrete column samples.
4. The typical failure mechanism of the tested CFRP confined slender strengthened concrete column samples.
1. Study the effect of reinforcement ratio (Group A) When increasing longitudinal reinforcement ratio for columns generally results in a small increase in the load carrying capacity and decrease in displacement of the tested column, as shown in, figure.
The results of the biaxial compression test of slender square columns show that wrapping CFRP around columns increases load-bearing capacity and reduce the deflection in the same section.