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Proceedings of the 18
th
International Conference on Soil Mechanics and Geotechnical Engineering, Paris 2013
differences in the thickness of exterior filament winding FRP
tube. Moreover, the flexural moment versus vertical deflection
at the time of cracking initiation of the specimen surface is
shown in Figure 7.
3 CONCLUSIONS
In this paper, we presented the structural behavior of HCFFP
specimens under compression and flexure. The improvements
of the load carrying capacity of HCFFP members compared
with CFFP, based on the experimental investigations, are
discussed. As expected, load carrying capacity of HCFFP
member is increased if the confining pressure and core concrete
strength are increased. In addition, the equations for predicting
the compressive and flexure strengths of the HCFFP member
are proposed. The results obtained by the analytical study are
compared with the average experimental results. It was also
provided that HCFFP member is suitable to apply as the
structural member by performing the comparison with the
strength of CFFP member.
For the future study, structural performance of the
connection between the segments of HCFFP, and
constructability of HCFFP pile should be explored and
eventually its applicability in the construction field should be
evaluated.
Base
Block
Base
Block
Wire gage
HCFFT
Specimen
Loading
Frame
4.0m
0.5m
0.5m
1.0m
1.0m
1.0m
0.75m
0.75m
P
Figure 6 Loading and measurement location of HCFFP specimen.
4 ACKNOWLEDGEMENTS
This research was supported by the Construction Technology
Innovation Program (CTIP) (code: 11CCTI-C053526-03) of the
Korea Institute of Construction & Technology Evaluation and
Planning (KICTEP). The financial support provided by the
KICTEP is acknowledged.
5 REFERENCES
An, D.J. 2011.
Structural Characteristics of Hybrid FRP-Concrete
Composite Piles.
Ph.D. Thesis, Hongik University, Seoul, Korea.
Choi, J.W., Joo, H.J., Nam, J.H., and Yoon, S.J. 2010. Development of
the Hybrid CFFT Pile.
Journal of the Korean Society for Advanced
Composite Structures
1 (2), 20-28.
Shin, K.Y. 2010.
Estimation of Load Carrying Capacity of Hybrid FRP-
Concrete Composite Pile.
Ph.D. Thesis, Hongik University, Seoul,
Korea.
(a) 2.8mm FFRP
(b) 4.2mm FFRP
(c) 5.6mm FFRP
Figure 7 Moment-deflection relationship.
