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|Title: ||The behavior of FRP-confined short concrete columns subjected to eccentric loading|
|Authors: ||Wong, Hei Long (黃羲朗)|
|Department: ||Department of Architecture and Civil Engineering|
|Issue Date: ||2015|
|Course: ||CA4516 Final Year Project|
|Programme: ||Bachelor of Engineering (Honours) in Building Engineering (Civil and Structural Engineering)|
|Supervisor: ||Dr. Wu, Yufei|
|Subjects: ||Columns, Concrete -- Testing.|
Reinforced plastics -- Testing.
Fiber-reinforced concrete -- Testing.
Reinforced concrete construction -- Testing.
|Citation: ||Wong, H. L. (2015). The behavior of FRP-confined short concrete columns subjected to eccentric loading (Outstanding Academic Papers by Students (OAPS)). Retrieved from City University of Hong Kong, CityU Institutional Repository.|
|Abstract: ||Many researches were carried out in the past on the column confined by fiber reinforced
polymer (FRP) under concentric loading, which was found that confinement greatly
enhance the strength and ductility of column. However, the loading of columns may not
be perfectly concentric due to different reasons, in which the column is subjected to
eccentric loading. In recent years, many people tried to predict the response of column
by simply using the stress-strain equation for concentric loading. Until now, only one
stress-strain model was developed to account for behavior of FRP-confined column
under eccentric loading with parameters correctly identified. Thus, this study was
developed based on the existing model. This study adopted another loading method to
investigate the performance of columns under eccentric loads and compare with the
existing model. 70 columns were tested and reported in this thesis. Three primary
parameters were introduced in the experimental program, which were axial load ratio,
confinement ratio and concrete grade. The relationship between the parameters was
studied by expressing the experimental data in terms of moment curvature curves and
N-M interaction diagrams. The relationship between the lateral strain and longitudinal
strain was also studied, which could demonstrate the effectiveness of FRP in enhancing
the capacity of column.
Based on the experimental result, comparisons were made to the prediction by Wu and
Jiang’s stress-strain equation by using section analysis. Great disparity was observed
between the predicted curve and the experimental curve. It was found that the prediction
from the model overestimates the moment capacity of the column. However, the reason
for such a great difference needs detailed analysis in the future study. A preliminary conclusion could be drawn that the stress-strain behavior of column was load path
dependent, as seen from the comparison with the existing experimental result.|
|Appears in Collections:||OAPS - Dept. of Architecture and Civil Engineering|
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