Browse > Article
http://dx.doi.org/10.7734/COSEIK.2015.28.6.707

Measurement of Transfer Length for a Seven-Wire Strand with FBG Sensors  

Lee, Seong-Cheol (Department of NPP Engineering, KEPCO International Nuclear Graduate School)
Choi, Song-Yi (Department of Marine and Civil Engineering, Chonnam National Univ.)
Shin, Kyung-Joon (Department of Civil Engineering, Chungnam National Univ.)
Kim, Jae-Min (Department of Marine and Civil Engineering, Chonnam National Univ.)
Lee, Hwan-Woo (Department of Civil Engineering, Pukyung National Univ.)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.28, no.6, 2015 , pp. 707-714 More about this Journal
Abstract
In this paper, an experimental program has been conducted to investigate transfer length in high strength concrete members pretensioned through a seven-wire strand with FBG sensors. To measure transfer length, five members were fabricated, which had a length of 3 m and a cross-section of $150{\times}150mm$. It was measured that the concrete compressive strength was 58MPa at pretensioning. Test results indicated that more precise and reliable measurement on the transfer length was attained with FBG sensors than conventional gauges attached on concrete surface. Through comparing the measured transfer length and predictions, applicability of several transfer length models in literature was investigated. This paper can be useful for relevant research field such as investigation on the bond mechanism of a seven-wire strand in concrete members.
Keywords
smart tendon; FBG sensor; pretension; transfer length;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Russell, B.W., Burns, N.H. (1993) Design Guidelines for Transfer, Development and Debonding of Large Diameter Seven Wire Strands in Pretensioned Concrete Gierders, FHWA/TX-93+1210-5F, Cener for Transportation Research, the University of Texas at Austin, Austin, TX, USA, 200.
2 Russell, B.W., Burns, N.H. (1997) Measurement of Transfer Lengths on Pretensioned Concrete Elements, J. Struct. Eng., ASCE, 123, pp.541-549.   DOI
3 Udd, E. (1996) Fiber Optic Smart Structures, John Wiley and Sons, Inc.
4 Zia, P., Mostafa, T. (1977) Development Length of Prestressing Strands, PCI J., 22, pp.54-65.   DOI
5 ACI Committee 318 (2011) Building Code Requirements for Structural Concrete (ACI 318-11) and Commentary, American Concrete Institute, Farmington Hills, MI, USA.
6 Balazs, G.L. (1992) Transfer Control of Prestressing Strands, PCI J., 37, pp.60-71.   DOI
7 Barnes, R.W., Grove, J.W., Burns, N.H. (2006) Experimental Assessment of Factors Affecting Transfer Length, ACI Struct. J., 100, pp.740-748.
8 Kim, J.M., Kim, H.W., Park, Y.H., Yang, I.H., Kim, Y.S. (2012) FBG Sensors Encapsulated into 7-Wire Steel Strand for Tension Monitoring of a Prestressing Tendon, Adv. Struct. Eng., 15(6), pp.907-918.   DOI
9 Kim, J.M., Kim, H.W., Kim, Y.S., Kim, J.W., Yun, C.B. (2008) A Methodology for Monitoring Prestressed Force of Bridges Using OFS-embedded Stand, J. Comput. Struct. Eng. Inst. Korea, 21(3), pp.287-294.
10 Kim, J.M., Kim, H.W., Park, Y.H., Kim, Y.S. (2010) Tension Monitoring of a Prestressing Strand for Concrete Bridge using In-Tendon FBG Sensors, Proc. IABMAS-2010, pp.205-210.
11 Lau, K.T. (2003) Fibre-Optic Sensors and Smart Composites for Concrete Applications, Mag. Concr. Res., 55(1), pp.19-34.   DOI
12 Ministry of Land, Transport and Maritime Affairs (2012) The Revision of Structural Concrete Design Code, p.342
13 Mitchell, D., Cook, W.D., Khan, A.A., Tham, T. (1993) Influence of High Strength Concrete on Transfer and Development Length of Prestressing Strand, PCI J., 38, pp.52-66.
14 Oh, B.H., Kim, E.S. (2000) Realistic Evaluation of Transfer Lengths in Pretensioned, Prestressed Concrete Members, ACI Struct. J., 97, pp.821-830.
15 Park, H., Cho, J.-Y. (2014) Bond-Slip-Strain Relationship in Transfer Zone of Pretensioned Concrete Elements, ACI Struct. J., 111, pp.503-513.
16 Park, H., Din, Z.U., Cho, J.-Y. (2012) Methodological Aspects in the Measurement of Strand Transfer Length in Pretensioned Concrete, ACI Struct. J., 109, pp.625-634.
17 Ren, L., Li, H.N., Sun, L., Li, D.S. (2005) Development of Tube-Packaged FBG Strain Sensor and Application in the Vibration Experiment of Submarine Pipeline Model. SPIE Proc., pp.98-103.