Hsiao-Lin Chenga, Elisa D. Sotelinob*, and Wai-Fah Chenc

a Department of Civil Engineering, Chung Cheng Institute of Technology, National Defense University, Taoyuan 33508, Taiwan, R.O.C.
b School of Civil Engineering, Purdue University, West Lafayette, Indiana, U.S.A.
c Department of Civil and Environmental Engineering, University of Hawaii at Manoa, Honolulu, Hawaii, HI 96822, U.S.A.


Download Citation: |
Download PDF


ABSTRACT


This paper presents the theoretical results of sensitivity studies performed on a simply supported FRP wrapped RC beam-column subjected to an axial load and to equal end moments. These sensitivity studies were performed to investigate the effects of the various parameters on the strength of the FRP wrapped RC beam-columns. The parameters used in the investigation include the unconfined concrete strength, the steel ratio, the thickness of FRP wraps, and the section diameter. A total of 23 cases were studied. Interaction equations were also developed in this work to provide a simplified and practical tool for engineers to evaluate the ultimate strength of the FRP wrapped columns. It is shown that the developed interaction equations for predicting the ultimate strength are reliable.


Keywords: fiber-reinforced polymers; reinforced concrete; sensitivity study; interaction diagram.


Share this article with your colleagues

 


REFERENCES


[1] Priestley, M. J. N., Seible, F., and Fyfe, E. 1992. Column seismic retrofit using fiberglass/epoxy jackets. Proceeding of the first International Conference on Advanced Composite Material in Bridges and Structure, Sherbrooke. Canada: 287-298.

[2] Xiao, Y., Martin. G. R., Yin, Z., and Ma, R. 1995. Retrofit design of existing reinforced concrete bridge columns using prefabricated composite Jacketing. Proceeding of National Seismic Conference on Bridges and Highway.

[3] Saadatmanesh, H., Ehsani, M. R., and Jin, L. 1996. Behavior of concrete columns retrofitted with fiber composite straps under cyclic loading. Proceeding of the 1st International Conference on Composites in Infrastructure, Arizon: 842-856.

[4] Monti, G., Nistico, N. and Santini, S. 2001. Design of FRP jackets for upgrade of circular bridge piers. Journal of Composites for Constructures, ASCE, 5, 2: 94-101.

[5] Fardis, M. N. and Khalili, H. H. 1982. FRP-encased concrete as a structural material, Magazine of Concrete Research, 34, 121: 191-202.

[6] Saadatmanesh, H., Ehsani, M. R., and Li, M. W. 1994. Strength and ductility of concrete columns externally reinforced with fiber composite straps. ACI Structure Journal, 91, 4: 434-447.

[7] Mirmiran, A. and Shahawy, M. 1997. “Analytical and Experimental Investigation of Reinforced Concrete Columns Encased in Fiberglass Tubular Jacket and Use of Fiber Jacket for Pile Splicing”. Final Report. The Florida Department of Transportation.

[8] Spoelstra, M. R. and Monti, G. 1999. FRP-confined concrete model. Journal of Composites in Construction, ASCE, 3, 3: 143-150.

[9] Pantazopoulou, S. J. and Mills, R. H. 1995. Microstructural aspects of the mechanical response of plain concrete. ACI Material Journal, 92: 605-616.

[10] Demers, M. and Neale, K. W. 1994. Strengthening of concrete columns with unidirectional composite sheets. Developments in short and medium span bridge engineering, ACM in Structures: 895-905.

[11] Nanni, A. and Bradford, N. M. 1995. FRP jacketed concrete under uniaxial compression. Constructure and Building Materials, 9, 2: 115-124.

[12] Mastrapa, J. C. 1997. “Effect of Bonded and Unbonded Construction on Confinement with Fiber Composite”. Master Thesis. University of Central Florida. Orlando. FL, S.A.

[13] Cheng, H. L., Sotelino, E. D. and Chen, W. F. 2002. Strength estimation for FRP wrapped reinforced concrete columns. Steel & Composite Structures, 2, 1: 1-20.

[14] Chen, W. F. and Rentschler, G. P. 1973. Ultimate strength of concrete-filled steel tubular beam-columns. Regional Conference on Tall Buildings, ASCE-IABSE Joint Committee. Madrid. Spain: 79-98.


ARTICLE INFORMATION




Accepted: 2004-06-16
Publication Date: 2004-07-03


Cite this article:

Cheng, H.-L., Sotelino, E.-D., Chen, W.-F. 2004. Sensitivity study and design procedure for FRP wrapped reinforced concrete circular columns, 2, 148–162. https://doi.org/10.6703/IJASE.2004.2.(2).148